PT2E-3051

Gas Detector Head
GD-84D-EX Series (Ethernet models)
GD-84D-EX-ET-EC
GD-84D-EX-ET
GD-84D-EX-EA-EC
GD-84D-EX-EA

Communication Functions Operating Manual

2-7-6 Azusawa, Itabashi-ku, Tokyo, 174-8744, Japan
Website: https://www.rikenkeiki.co.jp/

Contents

Contents
1.

2.

3.

4.

5.

About this document .................................................................................................................................. 4
1-1 Introduction .......................................................................................................................................... 4
1-2 DANGER, WARNING, and NOTE ...................................................................................................... 5
Device connection ...................................................................................................................................... 6
2-1 Connecting the product and a PC ....................................................................................................... 6
2-2 Setting IP addresses ........................................................................................................................... 7
2-2-1 Setting the IP address for this product...................................................................................... 7
2-2-2 Setting the IP address for the PC ............................................................................................. 7
2-2-3 Performing communication tests............................................................................................... 8
Setting GAS DETECTOR MANAGER ....................................................................................................... 9
3-1 Overview of GAS DETECTOR MANAGER......................................................................................... 9
3-1-1 About GAS DETECTOR MANAGER ........................................................................................ 9
3-1-2 Supported browsers ................................................................................................................ 10
3-2 Launching GAS DETECTOR MANAGER ......................................................................................... 11
3-2-1 Network environment settings................................................................................................. 11
3-2-2 Logging on in user mode ........................................................................................................ 13
3-2-3 Logging on in administrator mode .......................................................................................... 14
PLC communication settings ................................................................................................................... 16
4-1 OMRON CJ/CS series....................................................................................................................... 16
4-1-1 PLC communication settings (OMRON CJ/CS series) ........................................................... 16
4-1-2 Connecting the PLC (OMRON CJ/CS series) ........................................................................ 17
4-1-3 Setting PLC communication (OMRON CJ/CS series) with GAS DETECTOR MANAGER .... 18
4-1-4 Setting PLC communication (OMRON CJ/CS series) with the product.................................. 19
4-2 MELSEC Q series ............................................................................................................................. 20
4-2-1 PLC communication settings (MELSEC Q series).................................................................. 20
4-2-2 Connecting the PLC (MELSEC Q series) ............................................................................... 21
4-2-3 Setting PLC communication (MELSEC Q series) with GAS DETECTOR MANAGER .......... 22
4-2-4 Setting PLC communication (MELSEC Q series) with the product ........................................ 23
Operating GAS DETECTOR MANAGER.................................................................................................28
5-1 List of GAS DETECTOR MANAGER functions ................................................................................ 28
5-2 Checking the current status of the product ....................................................................................... 30
5-3 Displaying the setting information for the product (Status) ...............................................................32
5-4 Displaying histories ........................................................................................................................... 33
5-4-1 Displaying the event history (Event History) ...........................................................................33
5-4-2 Displaying the calibration history (Calibration History) ........................................................... 35
5-4-3 Displaying alarm trends (Alarm Trend) ...................................................................................36
5-4-4 Displaying network event history (Network Event History) ..................................................... 38
5-4-5 Displaying communication history (Communication History).................................................. 40
5-5 Performing calibration ....................................................................................................................... 42
5-5-1 Running zero calibration (Zero Calibration) ............................................................................42
5-5-2 Running span adjustment (Span Calibration) ......................................................................... 43
5-6 Performing alarm tests and fault alarm tests .................................................................................... 44
5-6-1 Performing alarm tests (Alarm Test) ....................................................................................... 44
5-6-2 Performing fault alarm tests (Fault Test) ................................................................................ 45
5-7 Viewing and changing setting details ................................................................................................ 46
5-7-1 Changing alarm related settings (Alarm) ................................................................................46
5-7-2 Changing settings related to the network, email, and PLC communications (Network) ......... 49
5-7-3 Changing the date and time (Date/Time)................................................................................ 52
5-7-4 Changing the settings of this product (Configuration)............................................................. 53

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Contents

6.

7.

Modbus/TCP communication ................................................................................................................... 55
6-1 Modbus/TCP communication specifications ..................................................................................... 55
6-1-1 Communication specifications ................................................................................................ 55
6-1-2 Exception responses ............................................................................................................... 55
6-2 Modbus/TCP communication register map ....................................................................................... 57
6-3 Modbus/TCP communication commands .........................................................................................65
PLC communication ................................................................................................................................. 67
7-1 PLC communication specifications ................................................................................................... 67
7-2 PLC communication data types ........................................................................................................ 68
7-2-1 Basic Data: Small .................................................................................................................... 68
7-2-2 Basic Data: Large ................................................................................................................... 69
7-2-3 Basic Data: Small + Optional Data ......................................................................................... 70
7-2-4 Basic Data: Large + Optional Data ......................................................................................... 71
7-2-5 Basic Data: Very Small ........................................................................................................... 72
7-2-6 Basic Data: Very Small + Optional Data .................................................................................73
7-3 PLC communication setting details ................................................................................................... 74
7-4 PLC communication data map .......................................................................................................... 76
7-4-1 Basic Data: Small .................................................................................................................... 76
7-4-2 Basic Data: Large ................................................................................................................... 78
7-4-3 Basic Data: Very Small ........................................................................................................... 80
7-4-4 Optional Data .......................................................................................................................... 81
7-5 PLC communication commands ....................................................................................................... 83
7-5-1 Issuing command 1 (setting change) ......................................................................................83
7-5-2 Issuing command 2 - 9 (Basic Data: Large only) .................................................................... 84
7-5-3 Issuing command 10 (alarm test concentration setting) (Basic Data: Large only) ................. 85
7-5-4 Issuing command 3 - 6 (Basic Data: Very Small only)............................................................ 86
7-5-5 Basic Data: Large command related data .............................................................................. 87
7-5-6 Basic Data: Very Small command related data ...................................................................... 89
7-4-4 Optional Data command related data .....................................................................................90
7-5-8 Changing alarm setpoint settings............................................................................................ 92
7-5-9 Setting INHIBIT ....................................................................................................................... 93
7-6 PLC communication setting specifications using this product .......................................................... 94
7-6-1 PLC Mode settings .................................................................................................................. 96
7-6-2 PLC Area settings .................................................................................................................100

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1. About this document

1-1 Introduction

1

About this document
1-1 Introduction
Thank you for purchasing this GD-84D-EX series Gas Detector (Ethernet models) ("product" hereinafter).
This operating manual describes product operating procedures and specifications for GD-84D-EX series(Ethernet models) Ethernet functions.
Make sure you have read and fully understood the contents of this manual before use.
Note that the GD-84D-EX series (Ethernet models) are intended to be used as part of a network.
Additionally, be sure to read the ‘GD-84D-EX Series Gas Detector Head Operating Manual’.
Keep this operating manual on hand to allow ready reference during use.
The contents of this manual are subject to change without notice to allow product improvements. Any
duplication or reproduction of this manual without permission is prohibited, whether in whole or in part.
Riken Keiki accepts no liability for accidents or damage resulting from use of programs of devices
communicating with the product, whether within or outside the warranty period.
Review the warranty policy indicated on the warranty.

<Models covered by this operating manual> GD-84D-EX-ET-EC
 GD-84D-EX-ET GD-84D-EX-EA-EC
 GD-84D-EX-EA<About the notations used in this document><Notations used for numbers>
Decimal: Numbers only indicatedExample: 1, 100, 1000, etc.
Hexadecimal: Values are prefixed with "0x".
Example: 0x00, 0x64, 0x3EB, etc.
<Sensor positioning indications>
In this document, the positions [A1], [A2], [B1], and [B2] at which the sensors are fitted in this product are
indicated as slot 1, slot 2, slot 3, and slot 4.

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1. About this document

1-2 DANGER, WARNING, and NOTE

1-2 DANGER, WARNING, and NOTEThis operating manual uses the following categories to indicate potential damage/hazards if the user
disregards the information provided and uses the product incorrectly:

DANGER

This indicates situations in which improper handling may result in fatal or
serious injury or significant property damage.

WARNING

This indicates situations in which improper handling may result in serious injury
or significant property damage.

CAUTION

This indicates situations in which improper handling may result in minor injury
or minor property damage.

Additionally, usage recommendations are indicated as follows:

NOTE

This indicates items that will be helpful to know when using the product.

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2. Device connection

2-1 Connecting the product and a PC

2

Device connection
2-1 Connecting the product and a PC
Connect the product and the PC as shown below.

When using a switching hub (PoE+)>
GD-84D-EX (Ethernet model)
PC

Switching hub (PoE+)

Ethernet cable<When using a switching hub (non PoE+)>
Connect the product to a 24 V DC power supply.
A switching hub (non PoE+) can be used with EA models (GD-84D-EX-EA-EC, GD-84D-EX-EA).
GD-84D-EX (EA model)
PC

Switching hub

Ethernet cable

Power cable(24 V DC)
AC-DC power
supply(24 V DC)6 / 99

2. Device connection

2-2 Setting IP addresses

2-2 Setting IP addresses
2-2-1 Setting the IP address for this productSet the following IP address in this product.
Refer to ‘7-10-18 ETHERNET settings (ETHERNET)’ in the ‘GD-84D-EX Series Gas Detector Head
Operating Manual’ for setting instructions.
IP address: 192.168.1.1
Subnet mask: 255.255.255.0

NOTE
 It takes about 10 seconds to write the IP address.

2-2-2 Setting the IP address for the PC
Set the following IP address in Internet Protocol (TCP/IP) Properties.
IP address: 192.168.1.2
Subnet mask: 255.255.255.0* The above assumes the user is running Windows 10.

CAUTION If the IP address of the device following replacement is identical to the one before replacement, it
may not be possible to communicate from the PC to the connected device for a certain period(usually 10 minutes) after replacement.
To enable communication as quickly as possible, disable the network connection, then enable once
again.

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2. Device connection

2-2 Setting IP addresses

2-2-3 Performing communication tests
1

Launch the Windows Command Prompt.

2Enter “ping 192.168.1.1” and press the <Enter> key.
If the communication test is successful, icons (TX fortransmission, RX for reception) will appear on the
product LCD as data is transmitted and received.

NOTE If the communication test fails, recheck the connections with the product, the IP address, and othersettings.

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3. Setting GAS DETECTOR MANAGER

3-1 Overview of GAS DETECTOR MANAGER

3

Setting GAS DETECTORMANAGER
3-1 Overview of GAS DETECTOR MANAGER
3-1-1 About GAS DETECTOR MANAGERGAS DETECTOR MANAGER is a Web application that connects the product to a PC, allowing real-timemonitoring of the status of this product and changes in network and alarm setpoint settings from a Web
browser. GAS DETECTOR MANAGER also displays an event history (alarm history) and calibration
history and can be used to run calibrations and alarm tests.
GAS DETECTOR MANAGER has a user mode and an administrator mode; each mode has different
functions.
<User mode>
Displays basic product information, such as the gas names and alarm setpoints, as well as event history(alarm history) and communication history.

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3. Setting GAS DETECTOR MANAGER

3-1 Overview of GAS DETECTOR MANAGER<Administrator mode>
Displays basic product information and event history (alarm history), communication history, calibration
history, alarm trends, etc.
You can also change settings for alarm setpoints or the network, run calibrations, alarm tests and fault
alarm tests, reset alarms, and set INHIBIT.

NOTE For more information on GAS DETECTOR MANAGER, refer to ‘5-1 List of GAS DETECTORMANAGER functions’.

3-1-2 Supported browsers
GAS DETECTOR MANAGER is designed to run in Microsoft Edge.
GAS DETECTOR MANAGER may not be fully compatible with other browsers.

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3. Setting GAS DETECTOR MANAGER

3-2 Launching GAS DETECTOR MANAGER

3-2 Launching GAS DETECTOR MANAGER
3-2-1 Network environment settings<Proxy server settings (Windows 10)>
This feature cannot be used via a proxy server.
If you are using a proxy server, turn the proxy server settings off.
1

In Windows, select [Settings] → [Network & Internet] → [Proxy].

2

Confirm that [Use a proxy server] is switched to [Off].
If [Use a proxy server] is switched to [On], switch to [Off].

1

2

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3. Setting GAS DETECTOR MANAGER

3-2 Launching GAS DETECTOR MANAGER<When using a local address (Windows 10)>CAUTION The following operations are for the settings to use a local address for this product. GASDETECTOR MANAGER cannot be used via a proxy server.

1

In Windows, select [Settings] → [Network & Internet] → [Proxy].

2

Select the [Don't use the proxy server for local (intranet) addresses] check box.

3

In the [Use the proxy server except for addresses that start with the following entries. Use
semicolons (;) to separate entries.] field, enter the IP address for this product.

4. Click the [Save] button.

3
2
4
1

NOTE
 If product settings are modified, the message [Data is updated.] will appear when you exit
maintenance mode, and the screen is shown again.
 Login details are recorded on this product when you log on in administrator mode. These login
details are deleted when the product is turned OFF. For this reason, the PC will display an error if
you turn the product ON while GAS DETECTOR MANAGER runs on the PC. Before turning the
product OFF, close GAS DETECTOR MANAGER. After starting the product, log into GAS
DETECTOR MANAGER once again.
 Do not change the settings on GAS DETECTOR MANAGER and this product at the same time.

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3. Setting GAS DETECTOR MANAGER

3-2 Launching GAS DETECTOR MANAGER

3-2-2 Logging on in user mode
1

Launch Microsoft Edge.

2

In the [Search or enter web address] field, enter “http://192.168.1.1” and press the <Enter> key.

Displays the user mode screen for GAS DETECTOR MANAGER.

NOTE
 Depending on the version and settings of the browser, the actual display may differ.

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3. Setting GAS DETECTOR MANAGER

3-2 Launching GAS DETECTOR MANAGER

3-2-3 Logging on in administrator mode
1

Launch Microsoft Edge.

2

In the [Search or enter web address] field, enter “http://192.168.1.1/login.html” and press the<Enter> key.

3

Enter the password and click the [Login] button.
The default password is “GD-84D”.

Displays the administrator mode screen for GAS DETECTOR MANAGER.

NOTE
 Depending on the version and settings of the browser, the actual display may differ.

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3. Setting GAS DETECTOR MANAGER

3-2 Launching GAS DETECTOR MANAGER<Logging out of administrator mode>
Click [Logout] in [HOME].

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4. PLC communication settings

3-2 Launching GAS DETECTOR MANAGER

4

PLC communication settings
This is a simple setup that allows easy connection to OMRON PLCs (CJ/CS series) and Mitsubishi Electric
PLCs (Q series) by setting the PLC mode and PLC area.
PLC mode: Select the PLC model to be connected and the communication data size.
PLC area: Select the data area to be used for writing/reading detectors in the destination PLC.
*When setting up using PLC mode or PLC area, the IP address of the PLC to be connected will be fixed atxxx.xxx.xxx.251.

4-1-1 PLC communication settings (OMRON CJ/CS series)
There are two ways to set PLC communications.

<Setting with GAS DETECTOR MANAGER>
Log in at the administrator mode screen for GAS DETECTOR MANAGER. Make the settings in Network
screen.
Detailed PLC communication settings can be made in GAS DETECTOR MANAGER.
For instructions on making or modifying settings, refer to ‘4-1-3 Setting PLC communication (OMRONCJ/CS series) with GAS DETECTOR MANAGER’.

NOTE Detailed settings for PLC communication can be made when the [PLC Mode] is [1].

<Setting in product maintenance mode>
Set [PLC Mode] and [PLC Area] in the ETHERNET settings in product maintenance mode([SET-18 ETHERNET] in [2-10 SETTING2]).
In each of the [PLC Mode] and [PLC Area] modes, the setting values for the PLC communication settings
are set automatically for each area.
For instructions on making or modifying settings, refer to ‘4-1-4 Setting PLC communication (OMRONCJ/CS series) with the product’.

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4. PLC communication settings

3-2 Launching GAS DETECTOR MANAGER

4-1-2 Connecting the PLC (OMRON CJ/CS series)
Connect the product and the PLC (OMRON CJ/CS series).
The following shows an example of making a connection when using a PoE+ compliant switching hub.
Set the following IP address in the PLC:
 IP address: 192.168.1.251
 FINS/UDP port: 9600
GD-84D-EX (Ethernet model)
PC

Switching hub (PoE+)

PLC (OMRON CJ/CS)

NOTE The PLC IP address is set to xxx.xxx.xxx.251, with the NODE fixed at 251. (xxx is the product IP
address.)

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4. PLC communication settings

3-2 Launching GAS DETECTOR MANAGER

4-1-3 Setting PLC communication (OMRON CJ/CS series) with GAS
DETECTOR MANAGER
Log in at the administrator mode screen for GAS DETECTOR MANAGER and click [Network] to display
the Network screen.
The [PLC Mode] must be set to [1] to make detailed settings for PLC communications.
The following screen shows an example of writing Basic Data:Small in the 0 address of the D memory of
the PLC.
In this example, note that the PLC IP address is: 192.168.1.251; the NODE: 251; and the FINS/UDP port:
9600.

Make the [PLC Mode] [1]
Items that canbe setNOTE For more information on settings for PLC communication, refer to ‘7. PLC communication’.
 For information on PLC settings and tools, refer to the PLC operating manual.

CAUTION Any errors in data written to the PLC memory may result in unexpected PLC behavior. Check thedata for errors before finalizing the settings.

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4. PLC communication settings

3-2 Launching GAS DETECTOR MANAGER

4-1-4 Setting PLC communication (OMRON CJ/CS series) with the productSet [PLC Mode] and [PLC Area] in the ETHERNET settings in product maintenance mode([SET-18 ETHERNET] in [2-10 SETTING2]). (Refer to '7-10-18 ETHERNET settings (ETHERNET)' in the‘GD-84D-EX Series Gas Detector Head Operating Manual’)
If you set the [PLC Mode] to [2] and the [PLC Area] to [2] with this unit, the PLC communication settings
will be as follows.
In this example, note that the PLC IP address is: 192.168.1.251; the NODE: 251; and the FINS/UDP port:
9600.
PLC Mode = 2
PLC Type
Type of Basic Data
Memory Address
Detector write
Detector read
PLC Area = 2
Area Type (FINS)

FINS
Small
0*
E2

* When the product IP address is 192.168.1.1

NOTE
 The PLC IP address is set to xxx.xxx.xxx.251, with the NODE fixed at 251. (xxx is the product IP
address.)
 For more information on settings for PLC communication, refer to ‘7. PLC communication’.
 For more information on [PLC Mode], the various [PLC Area] modes, and the PLC communication
settings corresponding to each area, refer to ‘7-6 PLC communication setting specifications using
this product’.
 For information on PLC settings and tools, refer to the PLC operating manual.

CAUTION Any errors in data written to the PLC memory may result in unexpected PLC behavior. Check thedata for errors before finalizing the settings.

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4. PLC communication settings

4-2 MELSEC Q series

4-2 MELSEC Q series
4-2-1 PLC communication settings (MELSEC Q series)
There are two ways to set PLC communications.

<Setting with GAS DETECTOR MANAGER>
Log in at the administrator mode screen for GAS DETECTOR MANAGER. Make the settings in Network
screen.
Detailed communication settings can be made in GAS DETECTOR MANAGER.
For instructions on making or modifying settings, refer to ‘4-4-3 Setting PLC communication (MELSEC Q
series) with GAS DETECTOR MANAGER’.

NOTE Detailed settings for PLC communication can be made when the [PLC Mode] is [1].

<Setting in product maintenance mode>
Set [PLC Mode] and [PLC Area] in the ETHERNET settings in product maintenance mode([SET-18 ETHERNET] in [2-10 SETTING2]).
In each of the [PLC Mode] and [PLC Area] modes, the setting values for the PLC communication settings
are set automatically for each area.
For instructions on making or modifying settings, refer to ‘4-2-4 Setting PLC communication (MELSEC Q
series) with the product’.

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4. PLC communication settings

4-2 MELSEC Q series

4-2-2 Connecting the PLC (MELSEC Q series)
Connect the product and the PLC (MELSEC Q series).
The following shows an example of making a connection when using a PoE+ compliant switching hub.
Set the following IP address in the PLC:
 IP address: 192.168.1.251
 UDP local port number: 2000

GD-84D-EX (Ethernet model)
PC

Switching hub (PoE+)

PLC (MELSEC Q)

NOTE The PLC IP address is set to xxx.xxx.xxx.251. (xxx is the same as the product IP address)

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4. PLC communication settings

4-2 MELSEC Q series

4-2-3 Setting PLC communication (MELSEC Q series) with GAS
DETECTOR MANAGER
Log in at the administrator mode screen for GAS DETECTOR MANAGER and click [■Network] to display
the Network screen.
The [PLC Mode] must be set to [1] to make detailed settings for PLC communications.
The following screen shows an example of writing Basic Data:Small in the 0 address of the D memory of
the PLC.
In this example, note that the PLC IP address is: 192.168.1.251, and the UDP local port number: 2000.

Make the [PLC Mode] [1]
Items that canbe setNOTE For more information on settings for PLC communication, refer to ‘7. PLC communication’.
 For information on PLC settings and tools, refer to the PLC operating manual.

CAUTION Any errors in data written to the PLC memory may result in unexpected PLC behavior. Check thedata for errors before finalizing the settings.

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4. PLC communication settings

4-2 MELSEC Q series

4-2-4 Setting PLC communication (MELSEC Q series) with the productSet [PLC Mode] and [PLC Area] in the ETHERNET settings in product maintenance mode([SET-18 ETHERNET] in [2-10 SETTING2]). (Refer to ‘7-10-18 ETHERNET settings (ETHERNET)’ in the‘GD-84D-EX Series Gas Detector Head Operating Manual’.)If you set the [PLC Mode] to [4] and the [PLC Area] to [2] with this unit, the PLC communication settings
will be as follows.
In this example, note that the PLC IP address is: 192.168.1.251, and the UDP local port number: 2000.
PLC Mode = 4
PLC Type
Type of Basic Data
Memory Address
Detector write
Detector read
PLC Area = 2
Area Type (MC)
*

MC
Small
0*
ZR (65536)

When the product IP address is 192.168.1.1

NOTE
 The PLC IP address is set to xxx.xxx.xxx.251. (xxx is the same as the product IP address)
 For more information on settings for PLC communication, refer to ‘7. PLC communication’.
 For more information on [PLC Mode], the various [PLC Area] modes, and the PLC communication
settings corresponding to each area, refer to ‘7-6 PLC communication setting specifications using
this product’.
 For information on PLC settings and tools, refer to the PLC operating manual.

CAUTION Any errors in data written to the PLC memory may result in unexpected PLC behavior. Check thedata for errors before finalizing the settings.

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4. PLC communication settings

4-3 PLC memory-saving setting function

4-3 PLC memory-saving setting function
This function allows a slot that is not equipped with an F-sensor but has a dummy sensor connected to it
to be optionally omitted from the data sent to the PLC. The setting of this function can be specified foreach slot and is to be selected from enable/disable. The standard settings are all enabled (when disabled,
the target sensor is omitted from the transmitted data).
As shown in the figure below, the slot to which the dummy sensor is connected can be set to the disabled
setting to save area in the PLC used by one product.

CAUTION・

If a sensor other than a dummy sensor is connected, the target slot cannot turn off the PLC memorysaving setting.

・Sensors other than dummy sensors cannot be replaced in slots where the PLC memory saving setting
is OFF. (By turning the setting ON before replacement work, it is possible to replace the sensor with
one other than a dummy sensor.) Therefore, when changing the configuration of the F sensor anddummy sensor, turn on all PLC memory-saving settings once before replacing the sensor, and thenreplace the sensor and make the settings again.

・

If the address setting of the PLC is wrong regardless of this setting, data in a certain area of the PLC
will be duplicated as shown in the figure below. In this case, the same area will be rewritten for eachother, resulting in unstable operation.

・When using this function, the size of the area occupied by each PLC is variable depending on thesetting, whereas it was fixed at a multiple of 4.

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4. PLC communication settings

4-3 PLC memory-saving setting function

Memory(1)(2)（In the left figure, memory 3 is duplicated in products (1) and (2)）

・



4-3-1

Setting PLC memory saving

Step (1)Operate the button on the GD-84D series main unit to enter the maintenance mode from the detection
mode. For details on GD-84D series button operation, please refer to the instruction manual of the mainunit.

1 In detection mode, hold down the MODE key (about
three seconds).

Switches to user mode

2 Press the ▲ key or ▼ key to select [1- 8 M MODE],
then press the TEST/SET key.

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4. PLC communication settings

4-3 PLC memory-saving setting function

3 Hold down the TEST/SET key for about threeseconds.

Switches to maintenance mode.
After switching to maintenance mode, proceed to step (2).

Step(2)
1

In maintenance mode, press the ▲ key or ▼ key toselect [2-10 SETTING2], then press the TEST/SET key.

2

Press the ▲ key or ▼ key to select［SET-18
ETHERNET］, then press the TEST/SET key.

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4. PLC communication settings

3

4-3 PLC memory-saving setting function

PLC Data Select on the third page of the maintenance mode "2-10 SETTING2" - "SET-18
ETHERNET". Select PLC data saving settings in the menu from the top to the bottom.
The display screen will look like this*The ON/OFF setting can be changed for the dummy sensor.
For F sensor, the setting is fixed at ON (*HOLD).

Step (3).
The settings are reflected at the time you exit the "SET-18 ETHERNET" menu.

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5. Operating GAS DETECTOR MANAGER

5-1 List of GAS DETECTOR MANAGER functions

5

Operating GAS DETECTORMANAGER
5-1 List of GAS DETECTOR MANAGER functions
NOTE If product settings are modified, the message [Data is updated.] will appear when you exit
maintenance mode, and the screen is shown again.
 Login details are recorded on this product when you log on in administrator mode. These login
details are deleted when the product is turned OFF. For this reason, the PC will display an error if
you turn the product ON while GAS DETECTOR MANAGER runs on the PC. Before turning the
product OFF, close GAS DETECTOR MANAGER. After starting the product, log into GAS
DETECTOR MANAGER once again.
 Do not change the settings on GAS DETECTOR MANAGER and this product at the same time.

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5. Operating GAS DETECTOR MANAGER

5-1 List of GAS DETECTOR MANAGER functions〇: Can be displayed ×: Cannot be displayed
Menu items

Function details

User mode

Administrator
mode

〇

〇

Displays information about
the various settings for the
product.

〇〇

Displays event history (alarm
history).
A trend graph can also be
displayed.

×〇

Displays the calibration
history for each slot.

×〇

Displays a list of alarm
trends.

Network Event
History〇〇

Displays the network event
history in list format.

Communication
History〇〇

Displays the communication
history in list format.

×〇

Logs out of administrator
mode.

Zero Calibration

×〇Performs zero calibration.

Span Calibration

×〇Performs span adjustment.

Alarm Test

×〇

Performs alarm tests.

Fault Test

×〇

Performs fault alarm tests.

Alarm

×

〇

View and set alarm settings.

×〇

View and make settings forcommunications, email, andnetworks.

×〇

View and set date and time.

×〇

View and set detailed
information for the productand the details of sensor
information related settings.

[MAINTENANCE] button

×〇

Switches to maintenance
mode.

[INHIBIT] button

×〇

Set ON/OFF for INHIBIT.

[ALARM RESET] button

×〇Resets the alarms.

HOME

StatusEvent History

Calibration
History
Alarm Trend

LogoutCALIBRATIONTESTAUTHORIZED
USERS

Network

Date/Time
Configuration

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5. Operating GAS DETECTOR MANAGER

5-2 Checking the current status of the product5-2 Checking the current status of the productThe upper part of the screen of GAS DETECTOR MANAGER displays flow and gas concentration for the
product in real-time.
<User mode screen>②①<Administrator mode screen>

②
③
④

①

⑤

NumberItem

Description①

Status of this product

Displays the model, TAG number, device name, installation
location, serial number, and alarms of the product, along withthe gas names, gas concentration, serial numbers, and
INHIBIT settings of the sensors fitted.

②

Flow display

Displays the current flow of the product.

③[MAINTENANCE] button*

Click to switch to the maintenance mode of the product.

④[ALARM RESET] button*

Click to reset the alarm state of the product.

⑤[INHIBIT] button*

Click to switch the sensor INHIBIT setting ON/OFF. If the
button is light blue, the INHIBIT setting is ON. If the button isgray, the INHIBIT setting is OFF.

* This can be set only in administrator mode.

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5. Operating GAS DETECTOR MANAGER

5-2 Checking the current status of the product

NOTE When the first alarm and second alarm are triggered, the following displays will appear on thescreen of GAS DETECTOR MANAGER.
<User mode screen><Administrator mode screen>
If you logged in as an administrator, you can cancel the alarm state on the product by clicking the[ALARM RESET] button.

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5. Operating GAS DETECTOR MANAGER

5-3 Displaying the setting information for the product (Status)

5-3 Displaying the setting information for the product (Status)
Click [Status] in GAS DETECTOR MANAGER to view product settings.
<User mode screen>
①

②

③
④
⑤

⑥

<Administrator mode screen>
①

②

③
④

⑥

NumberItem

Description①

General information(General)

Displays the gas names, full scale values, and setting units forthe sensors in each of the slots.

②

Alarm setpoint(Alarm Configuration)

Displays the alarm pattern, first and second alarm setpoints forthe sensors in each slot, the alarm type, and the energized/deenergized setting (first alarm contact, second alarm contact).

③

Calibration

Displays the date on which calibration was last performed forthe sensors in each slot.

④

Sensor information(Sensor Configuration)

Displays the model, serial number, and version for each sensor
in each slot.

⑤

Date and time (Date/Time)

Displays the date and time on the product as well as the dateformat.

⑥[Open Print Page] button

Click to view the screen for printing the current page.
To print, press the [Print] button in the printing screen.
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5. Operating GAS DETECTOR MANAGER

5-4 Displaying histories

5-4 Displaying histories
5-4-1 Displaying the event history (Event History)
Click [Event History] in GAS DETECTOR MANAGER to view 10 event history (alarm history) items in asingle screen. You can display a maximum of 272 history items.
<User mode screen>
①

②

③
④
⑤

<Administrator mode screen>
①

②

③
④
⑤

NumberItem

Description①

Displayed page number

Displays the page number being displayed.

②

Event history (alarm history)

Displays the date and time events occur and the descriptionsof events (alarms).
When there is graph data, the [Graph] button is displayed, andwhen you click it, it displays the trend graph showing the threeminutes before and after the alarm was triggered. (Refer to<Displaying the trend graph> on this page)③

Select page number todisplay

Select the page number to display and click the [GO] button toview the selected page.
Press the [>>] button or [<<] button to view the next page or
the previous page.

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5. Operating GAS DETECTOR MANAGER

Number

5-4 Displaying histories

Item

Description④[Open Print Page] button

Click to view the screen for printing the current page.
To print, press the [Print] button in the printing screen.

⑤[Open Print All] button

Click to view the screen for printing all pages, including pages
not currently displayed.
To print, press the [Print] button in the printing screen.

<Displaying the trend graph>
①

②

③
④

NumberItem

Description①

Event information

Displays for the event for which the graph is displayed the date
and time the event occurred, the description of the event(alarm), the serial number of the product, the serial number ofthe sensor, and the gas name.

②

Graph

Displays the trend graph showing the three minutes before
and after the alarm was triggered for each slot.

③[Return] button

Click to return to the event history screen.

④[Open Print Page] button

Click to view the screen for printing the current page.
To print, press the [Print] button in the printing screen.

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5. Operating GAS DETECTOR MANAGER

5-4 Displaying histories

5-4-2 Displaying the calibration history (Calibration History)
Click [Calibration History] in GAS DETECTOR MANAGER to view 10 calibration history events in asingle screen. You can display a maximum of 64 sensor calibration history items for each slot.
You must log in as an administrator.
<Administrator mode screen>
①

②

③
④
⑤
⑥

NumberItem

Description①

Displayed slot number andpage number

Displays the slot number and page number being displayed.

②

Calibration History

Displays the date of calibration and calibration details for thesensor fitted in the slot being displayed.

③

Select page number to display

Select the page number to display and click the [GO] button
to view the selected page.
Press the [>>] button or [<<] button to view the next page or
the previous page.

④

Slot selection

Select the slot number to display.
[Slot A1], [Slot A2], [Slot B1], and [Slot B2] correspond to theindications [A1], [A2], [B1], and [B2] on the product thatindicate the positions at which the sensors are fitted.

⑤[Open Print Page] button

Click to view the screen for printing the current page.
To print, press the [Print] button in the printing screen.

⑥[Open Print All] button

Click to view the screen for all pages, including pages not
currently displayed.
To print, press the [Print] button in the printing screen.

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5. Operating GAS DETECTOR MANAGER

5-4 Displaying histories

5-4-3 Displaying alarm trends (Alarm Trend)
Click [Alarm Trend] in GAS DETECTOR MANAGER to view 26 alarm trend items in a single screen.
You must log in as an administrator.
<Administrator mode screen>

①

•
•
•

②

NumberItem

Description①

Alarm Trend

The times the alarms triggered and the alarm details are
displayed.
Press the [Graph] button to display the trend graph showing
the three minutes before and after the alarm was triggered.
(Refer to ‘<Displaying the trend graph>’ on this page)②[Open Print Page] button

Click to view the screen for printing the current page.
To print, press the [Print] button in the printing screen.

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5. Operating GAS DETECTOR MANAGER

5-4 Displaying histories<Displaying the trend graph>
①

②

③
④

NumberItem

Description①

Alarm information

Displays for the alarm for which the graph is displayed thedate and time the alarm occurred, the description of the alarm,the serial number of the product, the serial number of thesensor, and the gas name.

②

Graph

Displays the trend graph showing the three minutes before
and after the alarm was triggered for each slot.

③[Return] button

Click to return to the event history screen.

④[Open Print Page] button

Click to view the screen for printing the current page.
To print, press the [Print] button in the printing screen.

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5. Operating GAS DETECTOR MANAGER

5-4 Displaying histories

5-4-4 Displaying network event history (Network Event History)
Click [Network Event History] in GAS DETECTOR MANAGER to view 100 network event history items
in a single screen. You can display a maximum of 2000 history items.
<User mode screen>
①

②

•
•
•

③
④
⑤

<Administrator mode screen>
①

②

•
•
•

③
④
⑤

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5. Operating GAS DETECTOR MANAGER

Number

5-4 Displaying histories

Item

Description①

Displayed page number

Displays the page number being displayed.

②

Network event history

Displays the dates and times the network events occurred anddescriptions of the network events.

③

Select page number todisplay

Select the page number to display and click the [GO] button toview the selected page.
Press the [>>] button or [<<] button to view the next page or
the previous page.

④[Open Print Page] button

Click to view the screen for printing the current page.
To print, press the [Print] button in the printing screen.

⑤[Open Print All] button

Click to view the screen for all pages, including pages not
currently displayed.
To print, press the [Print] button in the printing screen.

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5. Operating GAS DETECTOR MANAGER

5-4 Displaying histories

5-4-5 Displaying communication history (Communication History)
Click [Communication History] in GAS DETECTOR MANAGER to view 100 communication history
events in a single screen. You can display a maximum of 2000 history items.
<User mode screen>
①

②

•
•
•

③
④
⑤

<Administrator mode screen>
①

②

•
•
•

③
④
⑤

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5. Operating GAS DETECTOR MANAGER

Number

5-4 Displaying histories

Item

Description①

Displayed page number

Displays the page number being displayed.

②

Communication history

Displays the date and time the communication occurred, thesender IP address, the sender port, and the receiver port.

③

Select page number todisplay

Select the page number to display and click the [GO] button toview the selected page.
Press the [>>] button or [<<] button to view the next page or
the previous page.

④[Open Print Page] button

Click to view the screen for printing the current page.
To print, press the [Print] button in the printing screen.

⑤[Open Print All] button

Click to view the screen for all pages, including pages not
currently displayed.
To print, press the [Print] button in the printing screen.

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5. Operating GAS DETECTOR MANAGER

5-5 Performing calibration

5-5 Performing calibration
5-5-1 Running zero calibration (Zero Calibration)
Click [Zero Calibration] in GAS DETECTOR MANAGER to view the zero calibration screen.
You must log in as an administrator.
When preparations for zero calibration are complete on the product, click the [Start] button.

CAUTION When performing zero calibrations, carefully read ‘7-5 Performing calibration’ in the ‘GD-84D-EX
Series Gas Detector Head Operating Manual’. Comply with the procedures given.

<Administrator mode screen><Maintenance service>
Riken Keiki provides services related to regular maintenance, including gas calibration, adjustments, andservicing.
Preparing a calibration gas requires dedicated equipment, including gas cylinders of the specified
concentration and gas sampling bags. Our certified service engineers have expert knowledge of these
dedicated tools and products.
Please take advantage of the Riken Keiki maintenance service to maintain safe operation of the product.

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5. Operating GAS DETECTOR MANAGER

5-5 Performing calibration

5-5-2 Running span adjustment (Span Calibration)
Click [Span Calibration] in GAS DETECTOR MANAGER to view the span adjustments screen.
You must log in as an administrator.
Click the [Start] button when product span adjustment preparations are complete.

CAUTION Before performing span adjustments, carefully read ‘7-5 Performing calibration’ in the ‘GD-84D-EX
Series Gas Detector Head Operating Manual’. Comply with the procedures given.

<Administrator mode screen><Maintenance service>
Riken Keiki provides services related to regular maintenance, including gas calibration, adjustments, andservicing.
Preparing a calibration gas requires dedicated equipment, including gas cylinders of the specified
concentration and gas sampling bags. Our certified service engineers have expert knowledge of these
dedicated tools and products.
Please take advantage of the Riken Keiki maintenance service to maintain safe operation of the product.

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5. Operating GAS DETECTOR MANAGER

5-6 Performing alarm tests and fault alarm tests

5-6 Performing alarm tests and fault alarm tests
5-6-1 Performing alarm tests (Alarm Test)
Click [Alarm Test] in GAS DETECTOR MANAGER to view the screen for performing alarm tests.
You must log in as an administrator.
Click the [Start] button to start the alarm test.
<Administrator mode screen>

WARNING When performing an alarm test, be sure to notify the relevant departments in advance and takemeasures to prevent the external output signal or alarm contact from being activated and detected
as abnormal by peripheral devices or host systems. Please refer to the instruction manual of themain unit for the operating conditions of the external output signal and alarm contact.

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5. Operating GAS DETECTOR MANAGER

5-6 Performing alarm tests and fault alarm tests

5-6-2 Performing fault alarm tests (Fault Test)
Click [Fault Test] in GAS DETECTOR MANAGER to view the screen for performing fault alarm tests.
You must log in as an administrator.
Click the [Start] button to start the fault alarm test.
<Administrator mode screen>

WARNING In the case of EA models (GD-84D-EA, GD-84D-EA-ET), if a failure alarm test is performed, thefailure contact will be activated depending on the setting even during maintenance mode. Be sure to
take measures to prevent external output signals and alarm contacts from operating and being
detected as abnormal by peripheral devices and host systems before performing the test. Refer tothe instruction manual of the main unit for the operating conditions of the external output signal andalarm contact.

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5. Operating GAS DETECTOR MANAGER

5-7 Viewing and changing setting details

5-7 Viewing and changing setting details
NOTE If product settings are modified, the message [Data is updated.] will appear when you exit
maintenance mode, and the screen is shown again.
 Do not change the settings on GAS DETECTOR MANAGER and this product at the same time.

5-7-1 Changing alarm related settings (Alarm)
Click [Alarm] in GAS DETECTOR MANAGER to view the screen for viewing and changing a variety ofalarm related settings.
You must log in as an administrator.
<Administrator mode screen>①②③

Number①

Item

Description

Alarm related settings (Alarm Configuration)
Alarm Limiter

Set ON/OFF for the alarm point limiter.
[Yes]: Set ON for the alarm point limiter.
[No]: Set OFF for the alarm point limiter.

Latching Alarms

Set the alarm pattern.
[Yes]: Self-latching[No]: Auto-reset

Relay for Alarm Test

Enable/disable contacts during alarm tests.
[Yes]: Contact operation ON[No]: Contact operation OFF
Setting available with EA models

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5. Operating GAS DETECTOR MANAGER

5-7 Viewing and changing setting details

NumberDescription

②

③

Item
Output for Alarm Test

Set to enable/disable external output during alarm tests.
[Yes]:External output[No]: No external output
Setting available with EA models

Gas Name

Set the detection target gas for each slot.
This can be up to eight characters in length.

Alarm Point 1

Set the first alarm setpoint for the sensors in each slot.

Alarm Point 2

Set the second alarm setpoint for the sensors in each slot.

Alarm TypeSet the alarm type for the sensors in each slot.
When an oxygen deficiency alarm model ESF sensor is fitted,
any of H-HH type, L-LL type, or L-H type can be set.

1st Alarm Relay StateSet energized/de-energized for the first alarm for the sensors ineach slot.
[ND]: De-energized[NE]: Energized
Setting available with EA models

2nd Alarm Relay StateSet energized/de-energized for the second alarm for thesensors in each slot.
[ND]: De-energized[NE]: Energized
Setting available with EA models

Alarm Delay

Set the alarm delay time (seconds) for the sensors in each slot.

Fault alarm related settings (Fault Configuration)
Latching Fault

Set the fault alarm pattern.
[Yes]: Self-latching[No]: Auto-reset

Relay for Flow Fault

Set the behavior of fault contacts when flow is low.
[Yes]: Contact operation ON[No]: Contact operation OFF

Trouble Alarm RelayState

Set the energized/de-energized state for the fault alarm pattern.
[ND]: De-energized[NE]: Energized
Setting available with EA models

Caution Display

Set to enable/disable warning displays.
Select the check boxes for the fault codes to display.

Caution Output

Set whether to output warnings.
Select the check boxes for the fault codes to output.

Gas Name

Set the detection target gas for each slot.
This can be up to eight characters in length.

Fault Output

Set the value output at a sensor fault for each slot.
Select [0.5mA], [21.5mA], or [OPT]. If you selected [OPT], set avalue (digit: 0.1) in the 0.0 mA - 4.0 mA range.
Setting available with EA models[Update] button

Click this button to update the settings.

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5. Operating GAS DETECTOR MANAGER

5-7 Viewing and changing setting details

CAUTION Be sure to click the [Update] button if you changed the settings.
The settings will not be updated unless you click the [Update] button.

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5. Operating GAS DETECTOR MANAGER

5-7 Viewing and changing setting details

5-7-2 Changing settings related to the network, email, and PLC
communications (Network)
Click [Network] in GAS DETECTOR MANAGER to view the screen for viewing and changing network,
email, time, and PLC communication related settings.
You must log in as an administrator.

NOTE
 For information on the PLC communication settings, refer to ‘7-3 PLC communication setting
details’.

<Administrator mode screen>
①

②

③

④

⑤

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5. Operating GAS DETECTOR MANAGER

Number
①

Item

DHCP

Set DHCP ON/OFF.
The IP address is acquired automatically from the DHCP
server if [On] is selected. [IP Address], [Subnet Mask], and[Default Gateway] settings are not used in this case.

IP Address

Set the IP address.

Subnet Mask

Set the subnet mask.

Default Gateway

Set the default gateway.

MAC Address

An identification number unique to the device. This setting
cannot be changed.

Net Version

The version of the communication PCB. This setting cannot bechanged.

Standard time setting (Zone
Time)

③

Mail sending settings (Mail)⑤

Description

Communication settings(Network)②④

5-7 Viewing and changing setting details

Set the standard time (Zone Time).
This is used by the mail settings and the time synchronization
settings.

Use

Set enable ([Yes]) or disable ([No]) for the function to send
mail when an alarm is triggered.
If the function to send mail when an alarm is triggered is set to[Yes], then when an alarm or fault alarm is triggered, an email
with the event details is sent to the registered recipient email
addresses.

SMTP Server Domain
Name

Set the domain name of the SMTP server for the mail sender.

SMTP Server Address

Set the IP address for the SMTP Server.

Mail Address(From)

Set the email address for the mail sender.

Mail Address(To 1)・・
Mail Address(To 10)

Set the email address of the mail recipient.
A maximum of 10 recipient email addresses can be registered.
The email is sent simultaneously to all of the registeredaddresses.

Time synchronization setting (Time Synchronization)
Use

Set enable ([Yes]) or disable ([No]) for the Time
Synchronization function.
If the Time Synchronization function is set to [Yes], the date
and time are acquired from the NTP server at the specified
time ([Execution Time]) to adjust the clock. (There is nocorrection made for the delay caused by communication with
the NTP server.)NTP Server IP Address

Set the IP address for the NTP server from which date andtime are acquired.

Execution Time

Set the time when date and time are acquired.

[Update] button

Click this button to update the settings.

CAUTION Be sure to click the [Update] button if you changed the settings.
The settings will not be updated unless you click the [Update] button.

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5. Operating GAS DETECTOR MANAGER

5-7 Viewing and changing setting details

NOTE
 When an alarm is triggered on this product, email such as those below is sent.
<When the first alarm is triggered><When a flow abnormality alarm is triggered>

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5. Operating GAS DETECTOR MANAGER

5-7 Viewing and changing setting details

5-7-3 Changing the date and time (Date/Time)
Click [Date/Time] in GAS DETECTOR MANAGER to view the screen for viewing and changing date andtime settings.
You must log in as an administrator.
<Administrator mode screen>①②

Number①②

Item

Description

Date and time setting(Date/Time)
Date Format

Set the format for displaying the date and time.

No Change Date/Time

You cannot change the date and time.

Synchronize with PC

The date and time of this product is synchronized with the date
and time of the PC.

Specification

Set date and time of the product as specified. Specify theyear ([Year]), month ([Month]), day ([Day]), hour ([Hour]),minutes ([Minute]), and seconds ([Second]).

[Update] button

Click this button to update the settings.

CAUTION Be sure to click the [Update] button if you changed the settings.
The settings will not be updated unless you click the [Update] button.

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5. Operating GAS DETECTOR MANAGER

5-7 Viewing and changing setting details

5-7-4 Changing the settings of this product (Configuration)
Click [Configuration] in GAS DETECTOR MANAGER to view the screen for viewing and changing
settings such as TAG number, device name, and installation location of this product.
You must log in as an administrator.
<Administrator mode screen>①②

Number①

Item

Description

Settings of this product(Configuration)
TAG No.

Set the TAG number.
The TAG number is used as the mail sender when the
mail function is used.

Device Name

Set this device name of this product.

LocationSet the installation location of this product.

Password (Authorized User)

Set the password for administrator mode on GASDETECTOR MANAGER.

Auto Flow

Set ON/OFF for the automatic flow adjuster function.

Pump Check

Set ON/OFF for pump drive level diagnostics.

Gas Name

Set the detection target gas for each slot.
This can be up to eight characters in length.

Zero Suppression Value

Set zero suppression value for the sensors in each slot.

Zero Suppression Setting

Set the zero suppression type for each sensor in each
slot.
Select either [Slope] (SLOPE type) or [Cut off] (CUTtype).

Sensitivity Compensation

Set ON/OFF for the sensitivity correction function for thesensors in each slot.
This can be set for electrochemical type detection
principle sensors.

Zero Follower

Set ON/OFF for the zero follower function for the sensors
in each slot.

Zero Follower in 24-Hour

Set ON/OFF for the 24-hour zero follower function for thesensors in each slot.
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5. Operating GAS DETECTOR MANAGER

Number②

5-7 Viewing and changing setting details

Item

Description

Maintenance Output

Set the external output during maintenance mode for thesensors in each slot.
Select [2.5mA], [4-20mA], [HOLD] (hold previous value),or [4.0mA].
Setting available with EA models

4mA Adjustment

Adjust the external output of the sensor 4 mA for eachslot.
Setting available with EA models

20mA Adjustment

Adjust the external output of the sensor 20 mA for eachslot.
Setting available with EA models[Update] button

Click this button to update the settings.

CAUTION Be sure to click the [Update] button if you changed the settings.
The settings will not be updated unless you click the [Update] button.

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6. Modbus/TCP communication

6-1 Modbus/TCP communication specifications

6

Modbus/TCP communication
6-1 Modbus/TCP communication specifications
6-1-1 Communication specifications
The specifications for Modbus/TCP communication are as follows:
Item

Specification

ProtocolModbus/TCP

Transmission mode

RTU

Port number

502 port

Supported functions

Read Holding Register (0x03)
Preset Multiple Registers (0x10)

Simultaneousconnections8

6-1-2 Exception responses
This product will return Modbus/TCP exception responses in the following cases:<When an unsupported function is specified>This product supports functions 0x03 and 0x10.
Data example:
Query:
000000000006010400000001← Function code: 0x04
Response: 000000000003018401← Exception response 01: invalid function<When an address that does not exist is specified>
The address of this product is in the range between 40001 and 41024.
Data example:
Query:
000000000006010304000001← Address: 41025
Response: 000000000003018302← Exception response 02: invalid data address<When access to an address that does not exist is specified>
The address is correct, but the data count exceeds the last address (40256).
Data example:
Query:
000000000006010303FF0002← Read two registers from address 41024
Response: 000000000003018303← Exception response 03: invalid data

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6. Modbus/TCP communication

6-1 Modbus/TCP communication specifications<When an unwritable address is specified>
The entire function will return an error if even one location is unwritable.
Data example:
Query:
00000000000D0110002E000306000503E80000 ← Write three registers from address 40047(Address 40049 is unwritable)
Response: 000000000003019003← Exception response 03: invalid data

<When an invalid alarm setpoint is specified>
If the upper 16 bits and lower 16 bits cannot be written as a single query, no query is executed (i.e., thesystem does not write one or the other instead). The system returns an error. (Exception response 03:
invalid data)
An error is also returned if the value is not a valid alarm setpoint, as shown below. (Exception response
03: invalid data) Alarm setpoint 1 is a negative value.
 Alarm setpoint 2 is a negative value.
 Alarm setpoint 1 is greater than full scale.
 Alarm setpoint 2 is greater than full scale.
 When alarm setpoint 1 is greater than alarm setpoint 2 (when the alarm type is H-HH or L-H)
 When alarm setpoint 2 is greater than alarm setpoint 1 (when the alarm type is L-LL)
 Alarm setpoint 1 is less than 1/10 of full scale (when the alarm type is H-HH and the alarm point limiter
is ON).
 Alarm setpoint 2 is less than 1/10 of full scale (when the alarm type is H-HH and the alarm point limiter
is ON).
 Alarm setpoint 1 cannot be divided by a digit (determined by the value after rounding to significant
digits).
 Alarm setpoint 2 cannot be divided by a digit (determined by the value after rounding to significant
digits).

NOTE These operating instructions do not address general specifications for Modbus/TCP. Refer to the
Modbus/TCP specification documents. (http://www.modbus.org/)

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6. Modbus/TCP communication

6-2 Modbus/TCP communication register map

6-2 Modbus/TCP communication register map
The Modbus/TCP register map for this product is as follows:
Slot 1: addresses 40001 - 40256
Slot 2: addresses 40257 - 40512
Slot 3: addresses 40513 - 40768
Slot 4: addresses 40769 - 41024
Lines colored orange (): information on main unit of the product. All slots have the same values.
Lines colored light blue (): sensor information. Values for each slot
Address

Write

Item

Description

40001

－

Statusbit0 - 3: Mode
(0: initializing; 1: measurement mode, 3: INHIBIT; 5: testmode)
bit5: Fault flag
bit6: 1st alarm flag
bit7: 2nd alarm flag
bit8: 1st alarm contact flag
bit9: 2nd alarm contact flag
bit10: Fault contact flag
bit11: Heartbeat (0 and 1 repeat in two-second cycle.)

40002

－

(Reserved)

-

40003

－
Concentration value

Floating point number
Address 40003: lower 16 bits
Address 40004: upper 16 bits

40004

－

40005

－

Concentration
value*4

Signed integer (concentration rounded to nearest integer)

40006

－

(Reserved)-

Concentration units

bit0 - 2: Factor(0: same; 1: 1/10; 2: 1/100; 3: 1/1000)
bit8 - 11: Units(1: ppm; 2: ppb; 4: vol%; 8: %LEL)

40007

－

40008

－

Temperature

Unsigned integer
The temperature is displayed if the value is within theoperating temperature range (0 - 40 °C) for the product.
Beyond range values are indicated as higher than 40 °C or
lower than 0 °C.
・ 0 - 40: temperature (0 - 40 °C)
・ 41 - 3276: Higher than 40 °C
・ Other: Less than 0 °C

40009

－

(Reserved)

-

40010

－

Date and time

The lower 16 bits of the value for the number of seconds
elapsed since 0 o’clock, January 1, 1970

40011

－

Flow

Signed integer
Indicated in units of mL/min

40012

－

(Reserved)

-

40013

○
Alarm setpoint 1*6

Floating point number
Address 40013: lower 16 bits
Address 40014: upper 16 bits

Alarm setpoint 2*6

Floating point number

40014

○

40015

○

57 / 99

6. Modbus/TCP communication

Item

6-2 Modbus/TCP communication register map

Address

Write

Description
Address 40015: lower 16 bits
Address 40016: upper 16 bits

40016

○

40017

－

Alarm status

bit0: 1st alarm flag
bit1: 2nd alarm flag

40018

－

Fault status

bit1: Fault flag

40019

－
Full scale

Floating point number
Address 40019: lower 16 bits
Address 40020: upper 16 bits

40020

－

40021

○

(Reserved)

-

40022

○

(Reserved)-

Status*1, *2

bit0 - 1: Factor(0: same; 1: 1/10; 2: 1/100; 3: 1/1000)
bit2 - 3: Units(0: vol%; 1: %LEL; 2: ppm; 3: ppb)
bit4: Flow caution flag
bit5: Flow fault flag
bit6: Communication fault flag
bit7: Sensor fault flag
bit8: 1st alarm flag
bit9: 2nd alarm flag
bit10: Smoke alarm flag (SiO2)
bit11: Full scale over flag
bit12: Initialization flag
bit13: INHIBIT flag
bit14: Alarm test flag
bit15: Maintenance mode flag

40023

－

40024

－

Concentration
value*3, *5

Signed integer (equals significant integers of theconcentration value.)
The actual concentration value is the value obtained bymultiplying this value by the bit0 - 1 (= factor) of address
40023.

40025

－

Flow

Signed integer
Indicated in units of mL/min

40026

－

PLU heatertemperature

Signed integer
The temperature set for the PLU (units: °C)

40027

○

Y/M

Upper bytes: year (0- 99)
Lower bytes: month

40028

○

Day/hourUpper bytes: day
Lower bytes: hour

40029

○

Minute/seconds

Upper bytes: minutes
Lower bytes: seconds

40030

－

Date and time

The lower 16 bits of the value for the number of seconds
elapsed since 0 o’clock, January 1, 1970 (Same as address
40010)

40031－

Set potential

Signed integer
Indicated in units of mV

40032

－

Element voltage

Signed integer
Indicated in units of mV

40033

－

Temperature

Signed integer
Value that is 10 times the temperature (units: °C)

58 / 99

6. Modbus/TCP communication

6-2 Modbus/TCP communication register map

Address

Write

Item

Description

40034

－

PLU temperature

40035

－

Flow without PLU
bypass40036－

PLU power

40037

－

PLU voltage

40038

－

PLU current

40039

－

Device information

bit0 - 1: Model code (0: 70D; 1: 81D; 2: 84D-EX)

40040

－

Percentage forforecasting service
life

40041

－

Full scale

40042

－

Digit

A percentage that changes, with 100% being the value atthe time of the shipping adjustment.
0 - 100 (Units: %)Signed integer (the significant figures of the full scale turned
into an integer)
The actual full scale is the value obtained by multiplying thisvalue by the bit0 - 1 (= factor) of address 40023.
Signed integer (the significant figures of the digit turned into
an integer)
The actual digit is the value obtained by multiplying thisvalue by the bit0 - 1 (= factor) of address 40023.

40043

－

Factor0: same; 1: 1/10; 2: 1/100; 3: 1/1000

40044

－

Units

0: vol%; 1: %LEL; 2: ppm; 3: ppb

Signed integer
Indicated in units of °C
Signed integer
Indicated in units of mL/min
Unsigned integer
PLU voltage  PLU current
Unsigned integer
Indicated in units of mV
Unsigned integer
Indicated in units of mA

Signed integer (the significant figures of alarm setpoint 1 turned
into an integer)
The actual alarm setpoint 1 is the value obtained by multiplying
this value by the bit0 - 1 (= factor) of address 40023.
Signed integer (the significant figures of alarm setpoint 2 turned
into an integer)
The actual alarm setpoint 2 is the value obtained by multiplying
this value by the bit0 - 1 (= factor) of address 40023.
A signed integer (the significant figures of the zero suppression
value turned into an integer).
The actual zero suppression value is the value obtained bymultiplying this value by the bit0 - 1 (= factor) of address 40023.
Signed integer
Indicated in units of 10 milliseconds

40045

○

Alarm setpoint 1

40046

○

Alarm setpoint 2

40047

○

Zero suppression
value

40048

○

Alarm delay time

40049

○

Fault hold

0: Auto reset; 1: Self-latching

40050

○

Smoothing settings

0: Cut off, 1: Slope

40051

○

Alarm type

0: H-HH; 1: L-LL; 2: L-H

40052

○○

Alarm hold

0: Auto reset; 1: Self-latching

40053

○

Contact operation
during tests

0: Off; 1: On

40054

○

(Reserved)

-

40055

○

Energized/deenergized

bit0: 1st alarm (0: de-energized; 1: energized)
bit1: 2nd alarm (0: de-energized; 1: energized)
bit2: Fault (0: de-energized; 1: energized)

40056

○

(Reserved)

-

40057

○

(Reserved)

-

40058

○

(Reserved)

-

40059

○

Automatic correction

0: Off; 1: On
59 / 99

6. Modbus/TCP communication

6-2 Modbus/TCP communication register map

Address

Write

40060

○

Zero following

0: Off; 1: On

40061

○

24-hour zero
follower

0: Off; 1: On

40062

－

40063

－

40064

－
Date and time lastcalibrated

ASCII character string
Indicated as year 4 places + month 2 places + days 2places + hours 2 places + minutes 2 places + seconds 2
placesSerial number

ASCII character string
Left-justified; blanks are spaces (0x20).

Gas name

ASCII character string
Left-justified; blanks are spaces (0x20).

TAG number

ASCII character string
Left-justified; blanks are spaces (0x20).

Device Name

ASCII character string
Left-justified; blanks are spaces (0x20).

40065

－

40066

－

40067

－

40068

－

40069

○

40070

○

40071

○

40072

○

40073

○

40074

○

40075

○

40076

○

40077

○

40078

○

40079

－

40080

－

40081

－

40082

－

40083

－

40084

○

40085

○

40086

○

40087

○

40088

○

40089

○

40090

○

40091

○

40092

○

40093

○

40094

○

40095

○

40096

○

40097

○

40098

○

40099

○

Item

Description

60 / 99

6. Modbus/TCP communication

Address

Write

40100

○

40101

○

40102

○

40103

○

40104

○

40105

○

40106

○

40107

○

40108

○

40109

○

40110

○

40111

○

40112

○

40113

○

40114

○

40115

○

40116

○

40117

○

40118

○

40119

－

40120

－

40121

－

40122

－

40123

－

40124

－

40125

－

40126

－

40127

－

40128

－

40129

－

40130

－

40131

－

40132

－

40133

－

40134

－

40135

－

40136

－

40137

－

40138

－

6-2 Modbus/TCP communication register map

Item

Description

Measured location

ASCII character string
Left-justified; blanks are spaces (0x20).

Client code

ASCII character string
Left-justified; blanks are spaces (0x20).

Sensor serial
numberASCII character string
Left-justified; blanks are spaces (0x20).

Sensor model

ASCII character string
Left-justified; blanks are spaces (0x20).

Unit type

0: None; 1: NCF; 2: TEF; 3: IRF; 4: SGF; 5: SHF; 6: ESF; 7:
OSF; 8: PIF; 9: SSF

Error flag

From the most significant bits of address 40135: Error flag 0
to least significant bit of address 40142: Error flag 127
However, 100 - 127 are unused.

61 / 99

6. Modbus/TCP communication

Address

Write

40139

－

40140

－

40141

－

40142

－

40143

－

40144

－

40145

－

40146

－

40147

－

40148

○

40149

○

40150

○

40151

○

40152

○

40153

○

40154

○

6-2 Modbus/TCP communication register map

Item

Description

Alarm/fault new flag

bit0: Alarm new flag
bit1: Fault new flag

Fault flag

bit0: E-1
bit1 - 3: Reserved
bit4: E-5
bit5: E-6
bit6: E-7
bit7: Reserved
bit8: E-9
bit9: FLOW
bit10: RTC
bit11 - 14: Reserved
bit15: Concentration display flag

MAC address

From the upper bytes of address 40145: First octet
to lower bytes of address 40147: Sixth octet

IP address

From the upper bytes of address 40148: First octet
to lower bytes of address 40149: Fourth octet

Subnet mask

From the upper bytes of address 40150: First octet
to lower bytes of address 40151: Fourth octet

Default gateway

From the upper bytes of address 40152: First octet
to lower bytes of address 40153: Fourth octet

DHCP

0: Off; 1: On

40155

－

Service life
determination flag

Upper bytes: Service life forecast support flag (0: service
life forecasting not supported; 1: service life forecastingsupported)
Lower bytes: Service life determination flag (0: Before
service life expiration; 1: Service life expired)

40156

－

Serviceable life
expiration flag

0: Before serviceable life expiration; 1: Serviceable life
expired40157－

Additional status

40158

－

Degradation
diagnosis rate

40159

－

Days sensor used

40160

－

40161

－

40162

－

40163 40250

Sensor type

ASCII character string
Left-justified; blanks are spaces (0x20).

○(Reserved)

-

40251

○

Command40252○

Subcommand

40253

○

Parameter 1

Refer to ‘6-3 Modbus/TCP communication commands’.

62 / 99

6. Modbus/TCP communication

6-2 Modbus/TCP communication register map

Address

Write

Item

Description

40254

○

Parameter 2

40255

○

Parameter 3

40256

○

Parameter 440257 40512*

Slot 2Same as 40001 - 40256.

40513 40768*

Slot 3Same as 40001 - 40256.

40769 41024*

Slot 4Same as 40001 - 40256.

*1 Bit patterns for each status (address 40023)

15

14

13

12

11

10

9

8

7

6

5

4

3-0

Status

Maintenance mode flag

Alarm test flag

INHIBIT flag

Initialization flag

Full scale over flag

Smoke alarm flag (SiO2)

2nd alarm flag

1st alarm flag

Sensor fault flag

Communication fault flag

Flow fault flag

Flow caution flag

Factor, units

Normal: measuring
Normal: alarm (1st)Normal: alarm (2nd)Normal: alarm (smoke)
Full scale overInitialization
Maintenance
Alarm test
Fault alarm test
Problem: sensor
Problem: communication
Problem: flow
Caution: flow
INHIBIT

0
0
0
0
0
0
1
1
1
0
0
0
0
1

0
0
0
0
0
0
0
1
0
0
0
0
0
0

0
0
0
0
0
0
0
0
0
0
0
0
0
1

0
0
0
0
0
1
0
0
0
0
0
0
0
0

0
0
0
1
1
0
0
＊
0
0
0
0
0
0

0
0
0
1
0
0
0
0
0
0
0
0
0
0

0
0
1
1
＊
0
0
＊
0
0
0
0
0
0

0
1
＊
1
＊
0
0
＊
0
0
0
0
0
0

0
0
0
0
0
0
0
0
1
1
0
0
0
0

0
0
0
0
0
0
0
0
1
0
1
0
0
0

0
0
0
0
0
0
0
0
1
0
0
1
0
0

0
0
0
0
0
0
0
0
0
0
0
0
1
0

＊
＊
＊
＊
＊
＊
＊
＊
＊
＊
＊
＊
＊
＊

*: Undetermined value*2 When in the maintenance status, the alarm flag will not stand even if the concentration value goes above the alarm
setpoint. However, in a case such as when performing the maintenance mode [2- 0 GAS TEST] on the main unit,
then the maintenance flag and the alarm flag will both stand.
*3 If the sensor output is under the 0 base point, then the concentration value will be output as 0 during the normal
detection state. In the maintenance status, a negative concentration value (2’s complement representation) will be
output.
*4 An integer rounded off to the closest whole number.
Example: ・ Full scale 25.0 concentration value 20.9 → 21
・ Full scale 50.0 concentration value 0.2 → 0
・ Full scale 5.00 concentration value 0.20 → 0

63 / 99

6. Modbus/TCP communication

6-2 Modbus/TCP communication register map*5 An integer including the significant figures
Example: ・ Full scale 25.0 concentration value 20.9 → 209
・ Full scale 50.0 concentration value 0.2 → 2
・ Full scale 5.00 concentration value 0.20 → 20
*6 Be aware of the following points when writing alarm setpoints.
(1) The upper 16 bits and lower 16 bits must be written as a single query. A query to write one of them only is not
executed, and an error is returned. (Exception response 03: invalid data)(2) Concentration value is rounded off after the significant digits.
Example: 20.888 → 20.9
(3) An error is returned if the value is not a valid alarm setpoint, as shown below. (Exception response 03: invalid
data)
・ Alarm setpoint 1 is a negative value.
・ Alarm setpoint 2 is a negative value.
・ Alarm setpoint 1 is greater than full scale.
・ Alarm setpoint 2 is greater than full scale.
・ Alarm setpoint 1 is greater than alarm setpoint 2 (when the alarm type is H-HH or L-H).
・ Alarm setpoint 2 is greater than alarm setpoint 1 (when the alarm type is L-LL).
・ Alarm setpoint 1 is less than 1/10 of full scale (when the alarm type is H-HH and the alarm point limiter isON).
・ Alarm setpoint 2 is less than 1/10 of full scale (when the alarm type is H-HH and the alarm point limiter isON).
・ Alarm setpoint 1 cannot be divided by a digit (determined by the value after rounding to significant digits).
・ Alarm setpoint 2 cannot be divided by a digit (determined by the value after rounding to significant digits).

64 / 99

6. Modbus/TCP communication

6-3 Modbus/TCP communication commands

6-3 Modbus/TCP communication commands
You can execute the following functions by writing commands and parameters in the registers ofaddresses 40251 - 40256.
Execution of the functions is triggered by writing to the command (address 40251).
Normally, commands, subcommands, and if necessary, parameters, are written in a single query forexecution, but if only a command is written, then the subcommand and parameter at that point are used
for execution.

NOTE You can execute the functions by writing the commands and parameters as shown below to theregisters for addresses 40507 - 40512 for Slot 2, 40763 - 40768 for Slot 3, and 41019 - 41024 forSlot 4.

40251

40252

40253

40254

40255

40256

Command

Subcommand

Parameter 1

Parameter 2

Parameter 3

Parameter 4

S(0x0053)

-

-

-

-

Maintenancemode startE(0x0045)

-

-

-

-

Maintenancemode exit

0x0000---INHIBIT off

0x0001---INHIBIT on

S(0x0053)

-

-

-

-

Alarm test Start

E(0x0045)

-

-

-

-

Alarm test End

W(0x0057)

Concentration
value

-

-

-

Alarm test, apply
concentration
value

S(0x0053)

-

-

-

-

Fault alarm testStart

E
(0x0045)

-

-

-

-

Fault alarm test
EndSB
(0x5342)W(0x0057)

-

-

-

-

Alarm resetSP(0x5350)W(0x0057)

-

-

-

-

Air calibration
executeSZ(0x535A)

W(0x0057)

-

-

-

-

Zero calibration
executeMM(0x4D4D)
GS(0x4753)RA(0x5241)RT(0x5254)W(0x0057)

Function

NOTE
 Only one slot specified is effective in the alarm test. If multiple slots are specified simultaneously,
only one of the specified slots will be applied.

65 / 99

6. Modbus/TCP communication

6-3 Modbus/TCP communication commands

CAUTION Exception responses are not returned if you write any commands other than those shown above.
This is also the case if failure is the execution result of the above commands. Modbus/TCP
responses merely indicate whether the write was successful. To determine whether a commandexecution succeeded, reload the status and concentration values.

66 / 99

7. PLC communication

7-1 PLC communication specifications

7

PLC communication
7-1 PLC communication specifications
The specifications for PLC communication are as follows:
Item
Specification
ProtocolFor OMRON PLCs: FINS/UDPFor MELSEC PLCs: MC/UDP
Supported PLCs
OMRON CJ/CS Series
MELSEC Q series
Data type
Basic Data (Small)
Basic Data (Large)
Basic Data (Small) + Optional Data
Basic Data (Large) + Optional Data
Very Small
Very Small + Optional Data

NOTE
 These instructions do not address the use or specifications of PLCs. Refer to the operating manualfor your PLC.

67 / 99

7. PLC communication

7-2 PLC communication data types

7-2 PLC communication data types
7-2-1 Basic Data: Small
The following data is written to the PLC:
 Alarm status, concentration value, alarm setpoint, other basic data

PLC memory(D, E, etc.)
Write to PLC
Slot 1
Not used
Slot 2
GD-84D-EX(Ethernet model)

168 words

Not used
Slot 3
Not used
Slot 4
Not used

68 / 99

16 words
Basic Data: Small
26 words
16 words
Basic Data: Small
26 words
16 words
Basic Data: Small
26 words
16 words
Basic Data: Small
26 words

GD-84D-EX
writing
starting
address

7. PLC communication

7-2 PLC communication data types

7-2-2 Basic Data: Large
The following data is written to the PLC:
 Alarm status, concentration value, alarm setpoint, other basic data
 Date/time, gas name
The following data is read from the PLC:
 Data for changing settings such as alarm patterns, alarm setpoints, etc.

PLC memory(D, E, etc.)
Slot 1
Write to PLC

Slot 2168 words
Slot 3
Slot 442 words
Basic Data: Large
42 words

GD-84D-EX
writing
starting
address

Basic Data: Large
42 words
Basic Data: Large
42 words
Basic Data: Large

GD-84D-EX(Ethernet model)

Slot 1
Read from PLC
Slot 2
88 words
Slot 3
Slot 469 / 99

22 words
Basic Data: Large
22 words
Basic Data: Large
22 words
Basic Data: Large
22 words
Basic Data: Large

GD-84D-EX
reading
starting
address

7. PLC communication

7-2 PLC communication data types

7-2-3 Basic Data: Small + Optional Data
The following data is written to the PLC:
 Alarm status, concentration value, alarm setpoint, other basic data
The following data is read from the PLC:
 Extended data: names, sensor models, sensor serial numbers, etc.
 Data for changing various names, etc.
PLC memory(D, E, etc.)
16 words

Write to PLC
Slot 1

Basic Data: Small
72 words

GD-84D-EX
writing
starting
address

Optional Data
16 words
Slot 2

Basic Data: Small
72 words
Optional Data

352 words

16 words
Slot 3

Basic Data: Small
72 words
Optional Data
16 words

GD-84D-EX(Ethernet model)

Slot 4

Basic Data: Small
72 words
Optional Data

Read from PLC

Slot 1
Slot 2224 words
Slot 3
Slot 470 / 99

56 words
Optional Data
56 words
Optional Data
56 words
Optional Data
56 words
Optional Data

GD-84D-EX
reading
starting
address

7. PLC communication

7-2 PLC communication data types

7-2-4 Basic Data: Large + Optional Data
The following data is written to the PLC:
 Alarm status, concentration value, alarm setpoint, other basic data
 Date/time, gas name
The following data is read from the PLC:
 Data for changing settings such as alarm patterns, alarm setpoints, etc.
 Extended data: names, sensor models, sensor serial numbers, etc.
 Data for changing various names, etc.
PLC memory(D, E, etc.)
42 words
Write to PLC

Slot 1

Basic Data: Large
72 words

GD-84D-EX
writing
starting
address

Optional Data
42 words
Slot 2

Basic Data: Large
72 words
Optional Data

456 words

42 words
Slot 3

Basic Data: Large
72 words
Optional Data
42 words

Slot 4

Basic Data: Large
72 words
Optional Data

GD-84D-EX(Ethernet model)
22 words
Slot 1

Basic Data: Large
56 words
Optional Data
22 words

Read from PLC
Slot 2

Basic Data: Large
56 words
Optional Data

312 words

22 words
Slot 3

Basic Data: Large
56 words
Optional Data
22 words

Slot 4

Basic Data: Large
56 words
Optional Data

71 / 99

GD-84D-EX
reading
starting
address

7. PLC communication

7-2 PLC communication data types

7-2-5 Basic Data: Very Small
The following data is written to the PLC:
 Alarm status, concentration value data
The following data is read from the PLC: Point skip, data required for maintenance mode

PLC memory(D, E, etc.)
Slot 1

Write to PLC

Slot 2
16 words
Slot 3
Slot 4

4 words
Basic Data: Very Small
4 words

GD-84D-EX
writing
starting
address

Basic Data: Very Small
4 words
Basic Data: Very Small
4WORD
Basic Data: Very Small

GD-84D-EX(Ethernet model)
Slot 1
Read from PLC

Slot 2
16 words
Slot 3
Slot 472 / 99

4 words
Basic Data: Very Small
4 words
Basic Data: Very Small
4 words
Basic Data: Very Small
4 words
Basic Data: Very Small

GD-84D-EX
reading
starting
address

7. PLC communication

7-2 PLC communication data types

7-2-6 Basic Data: Very Small + Optional Data
The following data is written to the PLC:
 Alarm status, concentration value data
 Date/time, gas name
The following data is read from the PLC: Point skip, data required for maintenance mode Extended data: names, sensor models, sensor serial numbers, etc.
 Data for changing various names, etc.
PLC memory(D, E, etc.)
4 words
Write to PLC

Slot 1

Basic Data: Very Small
72 words

GD-84D-EX
writing
starting
address

Optional Data
4 words
Slot 2

Basic Data: Very Small
72 words
Optional Data

304 words

4 words
Slot 3

Basic Data: Very Small
72 words
Optional Data
4 words

Slot 4

Basic Data: Very Small
72 words
Optional Data

GD-84D-EX(Ethernet model)

4 words
Slot 1

Basic Data: Very Small
56 words
Optional Data
4 words

Read from PLC

Slot 2

Basic Data: Very Small
56 words
Optional Data

240 words

4 words
Slot 3

Basic Data: Very Small
56 words
Optional Data
4 words

Slot 4

Basic Data: Very Small
56 words
Optional Data

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GD-84D-EX
reading
starting
address

7. PLC communication

7-3 PLC communication setting details

7-3 PLC communication setting details
Use GAS DETECTOR MANAGER and this product to make PLC communication settings.
To make settings in GAS DETECTOR MANAGER, log on in Administrator mode and go to the Network
screen.
(Refer to ‘5-7-2 Changing settings related to the network, email, and PLC communications (Network)’.)While making product settings, refer to ‘7-10-18 ETHERNET settings (ETHERNET)’ in the ‘GD-84D-EX
Series Gas Detector Head Operating Manual’. For more information on communication settings for thisproduct, refer to ‘7-6 PLC communication setting specifications using this product’. Note that somesettings are not available with this product.
Item
PLC

FINS

Description

Remarks

PLC Mode

Make batch settings for PLC Type,Type of Basic Data, and Use Optional
Data.
Also, addresses for Detector Write
and Detector Read are set
automatically:

1: User-defined setting
2: FINS; Basic Data: Small; do not
use Optional.
3: FINS; Basic Data: Large; do not
use Optional.
4: MC; Basic Data: Small; do not
use Optional.
5: MC; Basic Data: Large; do not
use Optional.
6: FINS; Basic Data: Very Small;
do not use Optional.
7: FINS; Basic Data: Very Small;
do not use Optional.

PLC Area

Used to determine the address whensetting automatically in PLC Mode

PLC Type

Select the PLC communication type.
The FINS settings in this table areused when FINS is selected. The MCsettings in this table are used when
MC is selected.

Not Used: Do not use (default).
FINS: OMRON CJ/CS series
MC: MELSEC Q series

Type of Basic Data

Set the basic data type.

Small: small
Large: large
Very Small: very small

Use Optional Data

Set whether to use optional data.

Yes: Use
No: Do not use (default).

IntervalMin

Set the minimum transmissioninterval.
This is the transmission interval when
the data varies and the mode is notdetection mode (at an alarm state, inmaintenance state).

250 - 10,000 msec
Default minimum time: 1,000 msec
(with variation in concentration)
Default maximum time: 3,000 msec
(without variation in concentration)

Max

Set the maximum transmissioninterval.
This is the transmission interval in
detection mode when the data does
not vary.

Timeout

Set the timeout for reception from a
PLC.
Waiting is canceled if the specified
time elapses after a transmission
from a PLC and no response ismade. Data is resent after the time
set in [Interval] elapses.

IP Address

Set the IP address for the PLC.

Port

Set the UDP port number.

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1 - 10 sec
Default: 5 sec

Default: 9600

7. PLC communication

Item
Detector

PLC

Detector
Write

Detector
ReadMC

7-3 PLC communication setting details

Description
Network
Address

Set the network address for thisproduct. (Setting value in FINS
specifications)

NodeAddress

Set the node address for this product.
(Setting value in FINS specifications)

Unit
Number

The unit number of this product(Setting value in FINS specifications)

Network
Address

Set the network address for the PLC.
(Setting value in FINS specifications)

NodeAddress

Set the node address for the PLC.
(Setting value in FINS specifications)

Unit
Number

Set the PLC unit number.
(Setting value in FINS specifications)

MemoryAddress

Set the memory address for writing to
the PLC.

Area TypeSet the memory area for writing to the
PLC.

MemoryAddress

Set the memory address to be readfrom the PLC.

Area TypeSet the memory area to be read fromthe PLC.

IP Address

Set the IP address for the PLC.

Port

Set the UDP port number.

PLC

Detector
Write

Detector
Read

Network
Address

Set the network address for the PLC.
(Setting value in MC specifications)

NodeAddress

Set the node address for the PLC.
(Setting value in MC specifications)

MemoryAddress

Set the starting memory address forwriting to the PLC.

Area TypeSet the memory area for writing to the
PLC.

MemoryAddress

Set the starting memory address tobe read from the PLC.

Area TypeSet the memory area to be read fromthe PLC.

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Remarks

Default: 5000

7. PLC communication

7-4 PLC communication data map

7-4 PLC communication data map
7-4-1 Basic Data: Small<Write data map (GD-84D-EX write area)>
Address
GD-84DEX data

Item

Remarks0

Statusbit15: Maintenance
bit14: Test
bit13: INHIBIT
bit12: Initial
bit11: Alarm: RANGE OVER
bit10: Smoke detection
bit9: Alarm: 2nd
bit8: Alarm: 1st
bit7: Error: Sensor
bit6: Error: Communication(Internally, it consists of the CPU on
the main unit side and the CPU for Ethernet
communication, and the CPU on the main unit sideand the CPU for Ethernet communication
communicate with each other via serial
communication. This indicates a communication
error between the CPU on the main unit side and theCPU for Ethernet communication.)
bit5: Error: Flow
bit4: Caution: Flow
bit2 - 3: Concentration unit code (00: vol%; 01: %LEL; 10: ppm;
11: ppb)
bit0 - 1: Decimal places code (00: 1/1; 01: 1/10; 10: 1/100;
11: 1/1000)

1

Concentration
value

Signed integer (equals significant integers of the concentration
value.)
The actual concentration value is the value obtained by multiplying
this value by the decimal places code in status.

2

Counter toconfirm
continued
operation

This value increments with each transmission.
Reverts to 0 if an overflow occurs.

3

Supply flow rate

Indicated in mL/min

4

Pyrolyzer
temperature

Indicated in °C (or 0x8000 if no pyrolyzer is present)

5

IP address(Upper 16 bits)

First half of IP address
Example: For 192.168.0.1, this would be 0xC0A8.

6

IP address(Lower 16 bits)

Second half of IP address.
Example: For 192.168.0.1, this would be 0x0001.

7

Subnet mask
(Upper 16 bits)

First half of subnet mask
Example: For 255.225.225.0, this would be 0xFFFF.

8

Subnet mask
(Lower 16 bits)

Second half of subnet mask
Example: For 255.225.225.0, this would be 0xFF00.

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7. PLC communication

7-4 PLC communication data map

Address

Item

Remarks

9

Flag

bit11 - 12: Slot numbers (0: Slot 1; 1: Slot 2; 2: Slot 3; 3: Slot 4)
bit9 - 10: Model code (0: 70D; 1: 81D; 2: 84D-EX)
bit8: Fault new flag
bit7: Alarm new flag
bit6: Sensitivity correction (0: off; 1: on)
bit5: Zero following (0: off; 1: on)
bit4: Suppression type (0: Cut off; 1: Slope)
bit3: Fault alarm pattern (0: auto reset; 1: self-latching)bit2: Gas alarm pattern (0: auto reset; 1: self-latching)
bit0 - 1: Alarm type (0: H-HH; 1: L-LL, 2: L-H)

10

Full scale

Signed integer
The full scale is the value obtained by multiplying this value by thedecimal places code in status.

11

1st alarm
setpoint

Signed integer
The actual 1st alarm setpoint is the value obtained by multiplying
this value by the decimal places code in status.

12

2nd alarm
setpoint

Signed integer
The actual 2nd alarm setpoint is the value obtained by multiplying
this value by the decimal places code in status.

13

Concentration
value
3200 units

The relative value when full scale is represented as 3200.

14

1st alarm
setpoint
3200 units

The relative value when full scale is represented as 3200.

15

2nd alarm
setpoint
3200 units

The relative value when full scale is represented as 3200.

CAUTION During maintenance, the concentration value of address 1 can become a negative value.
Take into account the issue of negative values when obtaining working values from measured
concentrations.

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7. PLC communication

7-4 PLC communication data map

7-4-2 Basic Data: Large<Write data map (GD-84D-EX write area)>
Address
GD-84DEX data

Commanddata

ItemRemarks

0 - 15

Concentration/Alarm
status, etc.

Same as Basic Data (Small)(Refer to ‘7-4-1 Basic Data: Small’.)16

Date and time
(Year/Date)

The upper bytes indicate year (last two digits); the lower
bytes indicate month.

17

Date and time (Day/hour)

The upper bytes indicate day; the lower bytes indicate hour.

18

Date and time(minute/seconds)

The upper bytes indicate minutes; the lower bytes indicate
seconds.

19

Alarm delay time

Indicated in 10 milliseconds

20

Digit

Signed integer
The actual digit is the value obtained by multiplying thisvalue by the decimal places code in status.

21

Zero suppression value

Signed integer
The actual zero suppression value is the value obtained bymultiplying this value by the decimal places code in status.

22 - 27

Gas name

An ASCII character string.
Left-justified; blanks are spaces (0x20).

28 - 33(Reserved)

34

Pump duty

35(Reserved)

36

Service life data

bit0 - 7: Service life forecasting percentage
bit8 - 11: Reserved
bit12: Degradation diagnosis result
bit13: Used determination
bit14: Service life determination
bit15: Service life function yes/no37

Service life data 2

bit0 - 7: Degradation diagnosis rate

38

Service life data 3

Number of days sensor used

39

(Reserved)

40

Command execution
status(GD-84D-EX)

0: Normal state
1: Processing

41

Command execution
resultFor Command 1 (setting changes) (When successful: bit on;
when unsuccessful: bit off)
bit12: Sensitivity correction
bit11: Date and time
bit10: Zero following
bit9: Zero suppression type
bit8: Zero suppression value
bit7: Alarm delay time
bit6: Fault alarm patternbit5: Gas alarm pattern
bit4: 2nd alarm setpoint
bit3: 1st alarm setpoint
bit2: Alarm type
bit1: Subnet mask
bit0: IP address
Command 2 0: failure
1: success

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7. PLC communication

7-4 PLC communication data map

CAUTION During maintenance, the concentration value of address 1 can become a negative value.
Take into account the issue of negative values when obtaining working values from measured
concentrations.

<Read data map (GD-84D-EX read area)>
Address
GD-84DEX
setting data

Remarks0

IP address(Upper 16 bits)

First half of IP address

1

IP address(Lower 16 bits)

Second half of IP address.

2

Subnet mask
(Upper 16 bits)

First half of subnet mask

3

Subnet mask
(Lower 16 bits)

Second half of subnet mask

4

Flag

bit3: Fault alarm pattern (0: auto reset; 1: self-latching)bit2: Gas alarm pattern (0: auto reset; 1: self-latching)
bit0 - 1: Alarm type (0: H-HH; 1: L-LL, 2: L-H)

5

1st alarm setpoint

Signed integer
The actual 1st alarm setpoint is the value obtained bymultiplying this value by the decimal places code in status.

6

2nd alarm setpoint

Signed integer
The actual 2nd alarm setpoint is the value obtained bymultiplying this value by the decimal places code in status.

7

Date and time
(Year/Date)

The upper bytes indicate year (last two digits); the lower
bytes indicate month.

8

Date and time
(Day/hour)

The upper bytes indicate day; the lower bytes indicate hour.

9Date and time(minute/seconds)

The upper bytes indicate minutes; the lower bytes indicate
seconds.

10

Alarm delay time

Indicated in 10 milliseconds

11

Zero suppression value

Signed integer
The actual zero suppression value is the value obtained bymultiplying this value by the decimal places code in status.

12 - 15
Commanddata

Item(Reserved)

16

Command execution
status (PLC)

0: Normal state
1: Processing

17

Command code

(Refer to ‘7-5 PLC communication commands’.)

18

Parameter

19 - 21(Reserved)

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7. PLC communication

7-4 PLC communication data map

7-4-3 Basic Data: Very Small<Write data map (GD-84D-EX write area)>
Address
GD-84DEX
data

Item

Remarks0

Statusbit15: Maintenance
bit14: Test
bit13: INHIBIT
bit12: Initial
bit11: Alarm: RANGE OVER
bit10: Smoke detection
bit9: Alarm: 2nd
bit8: Alarm: 1st
bit7: Error: Sensor
bit6: Error: Communication
bit5: Error: Flow
bit4: Caution: Flow
bit2 - 3: Concentration unit code (00: vol%; 01: %LEL; 10: ppm; 11:
ppb)
bit0 - 1: Decimal places code (00: 1/1; 01: 1/10; 10: 1/100; 11: 1/1000)

1

Concentration
value

Signed integer (equals significant integers of the concentration value.)
The actual concentration value is the value obtained by multiplying
this value by the decimal places code in status.

2

Counter toconfirm
continued
operation

This value increments with each transmission.
Reverts to 0 if an overflow occurs.

3(Reserved)

CAUTION During maintenance, the concentration value of address 1 can become a negative value.
Take into account the issue of negative values when obtaining working values from measured
concentrations.

<Read data map (GD-84D-EX read area)>
Address
Commanddata

ItemRemarks0Command execution
status(PLC)

0: Normal state
1: Processing

1

Command code

(Refer to ‘7-5 PLC communication commands’.)

2-3(Reserved)

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7. PLC communication

7-4 PLC communication data map

7-4-4 Optional Data
<Write data map (GD-84D-EX write area)>

GD-84DEX
data

Commanddata

Address
Basic Data
(Small)Address
Basic Data
(Large)Address
Basic Data
(Very Small)

16 - 25

42 - 51

4 - 13

TAG number

An ASCII character string.
Left-justified; blanks arespaces (0x20).

26 - 35

52 - 61

14 - 23

Device Name

An ASCII character string.
Left-justified; blanks arespaces (0x20).

36 - 4562 - 71

24 - 33

Measured location

An ASCII character string.
Left-justified; blanks arespaces (0x20).

46 - 50

72 - 76

34 - 38

Client code

An ASCII character string.
Left-justified; blanks arespaces (0x20).

51 - 55

77 - 81

39 - 43

Sensor model

An ASCII character string.
Left-justified; blanks arespaces (0x20).

56 - 65

82 - 91

44 - 53

Sensor serial number

An ASCII character string.
Left-justified; blanks arespaces (0x20).

66 - 67

92 - 9354 - 55

Unit type setting.

An ASCII character string.
Justified left.

68 - 85

94 - 111

56 - 73(Reserved)

86

112

74

Command execution
status (GD-84D-EX)

0: Normal state
1: Processing

87

113

75

Command execution
resultFor Command 1 (settingchanges)(When successful: bit on;
when unsuccessful: bit off)
bit3: Client code
bit2: Measured location
bit1: Device namebit0: TAG number
Command 2 - (Reserved)
0: Failure
1: Success

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Item

Remarks

7. PLC communication

7-4 PLC communication data map<Read data map (GD-84D-EX read area)>

GD-84DEX
setting data

Commanddata

Address
Basic Data
(Small)Address
Basic Data
(Large)Address
Basic Data
(Very
Small)

0-9

22 - 31

4 - 13

TAG number

An ASCII character string.
Left-justified; blanks arespaces (0x20).

10 - 1932 - 41

14 - 23

Device Name

An ASCII character string.
Left-justified; blanks arespaces (0x20).

20 - 2942 - 51

24 - 33

Measured location

An ASCII character string.
Left-justified; blanks arespaces (0x20).

30 - 34

52 - 56

34 - 38

Client code

An ASCII character string.
Left-justified; blanks arespaces (0x20).

35 - 49

57 - 71

39 - 53(Reserved)

50

72

54

Commandexecution
status (PLC)

0: Normal state
1: Processing

51

73

55

Command code

(Refer to ‘7-5 PLC
communication commands’.)

52

74

56

Parameter

53 - 55

75 - 77

57 - 59(Reserved)

Item

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Remarks

7. PLC communication

7-5 PLC communication commands

7-5 PLC communication commands
Execute a variety of functions by writing Basic Data: Large, Basic Data: Very Small, and Optional Data
GD-84D-EX setting data, command execution statuses (PLC), command codes, and parameters.

7-5-1 Issuing command 1 (setting change)
1

Confirm that [Command execution status (PLC)] is “0” (normal state).

2

Issue command 1 (setting change).
(1) Set data in the items to be changed in [GD-84D-EX setting data] (multiple settings possible).
(2) Set “1” (setting change) in [Command code].
(3) Set the values that turn on the bits for the items to be changed in [Parameter] (multiple settings
possible).

3

Set “1” (execute process) in [Command execution status (PLC)].

4

Confirm that [Command execution status (GD-84D-EX)] is “1” (processing complete).

5

Set “0” (normal state) in [Command execution status (PLC)].
If the setting change was successful, the bits for the changed items in [Command execution result] will
be on.
If the setting change was unsuccessful, the bits for the changed items in [Command execution result]will be off.

CAUTION Do not change the values for [GD-84D-EX setting data], [Command code], or [Parameter] between
issuing the command and the completion of the process.

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7. PLC communication

7-5 PLC communication commands

7-5-2 Issuing command 2 - 9 (Basic Data: Large only)1

Confirm that [Command execution status (PLC)] is “0” (normal state).

2

Issue commands 2 - 9.
(1) Set data in the items to be changed in [GD-84D-EX setting data] (multiple settings possible).
(2) Set one of commands “2” to “9” in the [Command code].
(3) Set “0” in [Parameter] (commands 2 - 9 do not use parameters).

3

Set “1” (execute process) in [Command execution status (PLC)].

4

Confirm that [Command execution status (GD-84D-EX)] is “1” (processing complete).

5

Set “0” (normal state) in [Command execution status (PLC)].
If the setting change was successful, the [Command execution result] will be “1”.
If the setting change was unsuccessful, the [Command execution result] will be “0”.

CAUTION Do not change the values for [GD-84D-EX setting data], [Command code], or [Parameter] between
issuing the command and the completion of the process.

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7. PLC communication

7-5 PLC communication commands

7-5-3 Issuing command 10 (alarm test concentration setting) (Basic Data:
Large only)1

Confirm that [Command execution status (PLC)] is “0” (normal state).

2

Issue command 10 (alarm test concentration setting).
(1) Set data in the items to be changed in [GD-84D-EX setting data] (multiple settings possible).
(2) Set “10” (alarm test concentration setting) in [Command code].
(3) Set the alarm test concentration value in [Parameter].

3

Set “1” (execute process) in [Command execution status (PLC)].

4

Confirm that [Command execution status (GD-84D-EX)] is “1” (processing complete).

5

Set “0” (normal state) in [Command execution status (PLC)].
If the setting change was successful, the [Command execution result] will be “1”.
If the setting change was unsuccessful, the [Command execution result] will be “0”.

CAUTION Do not change the values for [GD-84D-EX setting data], [Command code], or [Parameter] between
issuing the command and the completion of the process.

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7. PLC communication

7-5 PLC communication commands

7-5-4 Issuing command 3 - 6 (Basic Data: Very Small only)1

Confirm that [Command execution status (GD-84D-EX)] is “0” (normal state).

2

Set one of commands “3” to “6” in the [Command code].

3

Confirm that [Command execution status (GD-84D-EX)] is “1” (processing complete).

4

Confirm that it is the value specified in bit15: maintenance and bit13: INHIBIT of [Status].

CAUTION Do not change the values for [GD-84D-EX setting data], [Command code], or [Parameter] between
issuing the command and the completion of the process.

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7. PLC communication

7-5 PLC communication commands

7-5-5 Basic Data: Large command related data
Address

GD-84DEX
write
area

GD-84DEX
read
area

Item

Description

40

Command execution
status(GD-84D-EX)

0: Normal state
1: Processing

41

Command execution
resultFor Command 1 (setting changes)(When successful: bit on; when unsuccessful: bitoff)
bit12: Sensitivity correction
bit11: Date and time
bit10: Zero following
bit9: Zero suppression type
bit8: Zero suppression value
bit7: Alarm delay time
bit6: Fault alarm patternbit5: Gas alarm pattern
bit4: 2nd alarm setpoint
bit3: 1st alarm setpoint
bit2: Alarm type
bit1: Subnet mask
bit0: IP address
Command 2 0: Failure
1: Success

Address

Item

Description

0 - 15

Data for different settings

16

Command execution
status(PLC)

0: Normal state
1: Execute process

17

Command

Sets the command code.

18

Depends on parametersand commands.

(Refer to ‘<Basic Data: Large command codes>’below.)

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7. PLC communication

7-5 PLC communication commands<Basic Data: Large command codes>
Command code

Details

Parameter

1

Setting changes

Setting flags (Refer to ‘<Parameters (setting
flags) for Command code 1 (setting change)>’
below.)

2

Buzzer stop

Not used

3

INHIBIT on

Not used

4

INHIBIT off

Not used5

Maintenance mode start

Not used6

Maintenance mode exit

Not used

7

Zero calibration execute

Not used

8

Alarm test mode start

Not used

9

Alarm test mode end

Not used

10

Alarm test concentration setting

Test concentration value

11

Air calibration execute

Not used<Parameters (setting flags) for Command code 1 (setting change)>
Multiple items can be changed simultaneously. In this case, turn on multiple bits at the same time.
Parameter(bit)

Details

bit15(Reserved)

bit14(Reserved)

bit13(Reserved)

bit12

Sensitivity correction

bit11

Date and time

bit10

Zero following

bit9

Zero suppression type

bit8

Zero suppression value

bit7

Alarm delay time

bit6

Fault alarm pattern

bit5

Gas alarm pattern

bit4

2nd alarm setpoint

bit3

1st alarm setpoint

bit2

Alarm type

bit1

Subnet mask

bit0

IP address

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7. PLC communication

7-5 PLC communication commands

7-5-6 Basic Data: Very Small command related data
Address

Item

0Command execution status(PLC)

0: Normal state
1: Execute process

1

Command

Sets the command code.

GD-84D-EX
read
area

Description<Basic Data: Very Small command codes>
Command code

Details

Parameter

3

INHIBIT on

Not used

4

INHIBIT off

Not used5

Maintenance mode start

Not used6

Maintenance mode exit

Not used

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7. PLC communication

7-5 PLC communication commands

7-4-4 Optional Data command related data

GD-84DEX
write
area

GD-84DEX
read
area

Address
Basic Data
(Small)Address
Basic Data
(Large)Address
Basic Data
(Very Small)

86

112

74

Commandexecution
status(GD-84D-EX)

0: Normal state
1: Processing

87

113

75

Commandexecution result

For Command 1 (settingchanges)(When successful: bit on;
when unsuccessful: bit off)
bit3: Client code
bit2: Measured location
bit1: Device namebit0: TAG number
Command 2 - (Reserved)
0: NG
1: OK

Address
Basic Data
(Small)Address
Basic Data
(Large)Address
Basic Data
(Very Small)0 - 4922 - 71

4 - 5350

72

54

Commandexecution
status (PLC)

0: Normal state
1: Execute process

51

73

55

Command

Sets the command code.

52

74

56

Depends onparameters andcommands.

(Refer to ‘<Optional Data
command code>’ below.)

Item

Description

Item

Description

Data for different
settings<Optional Data command code>
Command code

Details

Parameter

1

Setting changes

Setting flags (Refer to ‘<Parameters (setting flags) for Commandcode 1 (setting change)>’ below.)

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7. PLC communication

7-5 PLC communication commands<Parameters (setting flags) for Command code 1 (setting change)>
Multiple items can be changed simultaneously. In this case, turn on multiple bits at the same time.
Parameter(bit)

Details

bit15(Reserved)

bit14(Reserved)

bit13(Reserved)

bit12(Reserved)

bit11(Reserved)

bit10(Reserved)

bit9(Reserved)

bit8(Reserved)

bit7(Reserved)

bit6(Reserved)

bit5(Reserved)

bit4(Reserved)

bit3

Client code

bit2

Measured location

bit1

Device Name

bit0

TAG number

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7. PLC communication

7-5 PLC communication commands

7-5-8 Changing alarm setpoint settings
The alarm setpoint settings use the following addresses:
Item

Address[GD-84D-EX setting data (1st alarm
setpoint)]

Basic Data: Large
GD-84D-EX read area address: 5[Command execution status (PLC)]

Basic Data: Large
GD-84D-EX read area address: 16[Command code]

Basic Data: Large
GD-84D-EX read area address: 17[Parameter]

Basic Data: Large
GD-84D-EX read area address: 18[Command execution status (GD-84D-EX)]

Basic Data: Large
GD-84D-EX write area address: 40[Command execution result]

Basic Data: Large
GD-84D-EX write area address: 41

Set as shown below to set the 1st alarm setpoint to “500” and the 2nd alarm setpoint to “1000”.
1

Confirm that [Command execution status (PLC)] is “0” (normal state).

2

Set the alarm setpoints.
(1) Set “500” in [GD-84D-EX setting data].
(2) Set “1” (setting change) in [Command code].
(3) Set “0x0018” in [Parameter].
“0x0018” is a parameter (setting flag) with command code 1 (setting change) indicating that the 1st
alarm setpoint (bit3) and the 2nd alarm setpoint (bit4) were turned on.

3

Set “1” (execute process) in [Command execution status (PLC)].

4

Confirm that [Command execution status (GD-84D-EX)] is “1” (processing complete).

5

Set “0” (normal state) in [Command execution status (PLC)].
If the setting change was successful, the [Command execution result] will be “0x0018”.
(“0x0018” indicates the 1st alarm setpoint (bit3) and the 2nd alarm setpoint (bit4) were turned on.)If the setting change was unsuccessful, the [Command execution result] will be “0x0000”.
(“0x0000” indicates the 1st alarm setpoint (bit3) and 2nd alarm setpoint (bit4) were turned off.)

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7. PLC communication

7-5 PLC communication commands

7-5-9 Setting INHIBITThe INHIBIT setting uses the following addresses:
Item

Address[Command execution status (PLC)]

Basic Data: Large
GD-84D-EX read area address: 16[Command code]

Basic Data: Large
GD-84D-EX read area address: 17[Parameter]

Basic Data: Large
GD-84D-EX read area address: 18[Command execution status (GD-84D-EX)]

Basic Data: Large
GD-84D-EX write area address: 40[Command execution result]

Basic Data: Large
GD-84D-EX write area address: 41

1

Confirm that [Command execution status (PLC)] is “0” (normal state).

2

Set ON/OFF for INHIBIT.
(1) When turning INHIBIT on, set “3” in the [Command code]; when turning off, set “4” in the[Command code].
(2) Set “0” (parameter not used) in [Parameter]3

Set “1” (execute process) in [Command execution status (PLC)].

4

Confirm that [Command execution status (GD-84D-EX)] is “1” (processing complete).

5

Set “0” (normal state) in [Command execution status (PLC)].
If the setting change was successful, the [Command execution result] will be “1”.
If the setting change was unsuccessful, the [Command execution result] will be “0”.

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7. PLC communication

7-6 PLC communication setting specifications using this product7-6 PLC communication setting specifications using thisproduct
You can configure the ETHERNET settings in the maintenance mode of the product([SET-18 ETHERNET] in [2-10 SETTING2]) to set the [PLC Mode] to [1] - [7] and [PLC Area] to [0] - [15].
(Refer to ‘7-10-18 ETHERNET settings (ETHERNET)’ in the ‘GD-84D-EX Series Gas Detector Head
Operating Manual’.)
When [PLC Mode] setting of this product is [2] - [7], and [PLC Area] setting is [0] - [15], the following
values corresponding to the different PLC modes and PLC memory areas set on this product areautomatically set in the Network screen of GAS DETECTOR MANAGER. Note that items that wereautomatically set are grayed out and cannot be changed.

③
④
①
②
⑤

⑥

①
②
⑥

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7. PLC communication

7-6 PLC communication setting specifications using this product

The IP address for this product is assumed to be IP1.IP2.IP3.IP4.
Item[PLC Mode](When [2] - [7])Remarks①

IP Address*

0 - 254②

Port*

0 - 65535

Default: 9600 (FINS)
Default: 5000 (MC)③IntervalMin

250 - 10000

Default: 1,000 msec

Max

250 - 10000

Default: 3,000 msec④

TimeOut⑤⑥

Detector

PLC

IP4 of IP1.IP2.IP3.PLC

Default: 251

1 - 10

Default: 5 sec

Network Address

0 - 255

Default: 0(Node Address)

0 - 255

Unit Number

0 - 255

Default: 0

Network Address

0 - 255

Default: 0(Node Address)

0 - 255

Unit Number

0 - 255

IP4IP4 of PLC
Default: 0* [FINS] and [MC] share the same [IP Address] and [Port].

NOTE
 Log on in Administrator mode to view the Network screen.
 Grayed out items cannot have their settings changed in GAS DETECTOR MANAGER.
 When [PLC Mode] has been set to [1] in the product ETHERNET settings, communication settings
can be made in Network screen of GAS DETECTOR MANAGER. (Refer to ‘4. PLC communication
settings’.) For more information on settings for each item, refer to ‘7-3 PLC communication setting details’.

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7. PLC communication

7-6 PLC communication setting specifications using this product7-6-1 PLC Mode settings
When [2] - [7] are set in [PLC Mode] on the product, the following Network screen items are set
automatically.
The information set differs for each IP address on the product. Refer to the following table for details of thesettings:[PLC Mode] setting value

Items automatically set
by [PLC Mode] settings([2] - [7])NOTE Log on in Administrator mode to view the Network screen.

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7. PLC communication

7-6 PLC communication setting specifications using this product<[PLC Mode]: [1] - [4]>Communication
mode[PLC Mode]
Default: 1
PLC Type
Type of Basic
Data
MemoryAddress
IP address
xxx.xxx.xxx.1
xxx.xxx.xxx.2
xxx.xxx.xxx.3
xxx.xxx.xxx.4
xxx.xxx.xxx.5
xxx.xxx.xxx.6
xxx.xxx.xxx.7
xxx.xxx.xxx.8
xxx.xxx.xxx.9
xxx.xxx.xxx.10
xxx.xxx.xxx.11
xxx.xxx.xxx.12
xxx.xxx.xxx.13
xxx.xxx.xxx.14
xxx.xxx.xxx.15
xxx.xxx.xxx.16
・・
xxx.xxx.xxx.164
xxx.xxx.xxx.165
xxx.xxx.xxx.166
xxx.xxx.xxx.167
xxx.xxx.xxx.168
xxx.xxx.xxx.169
xxx.xxx.xxx.170
xxx.xxx.xxx.171
xxx.xxx.xxx.172
xxx.xxx.xxx.173
xxx.xxx.xxx.174
xxx.xxx.xxx.175
xxx.xxx.xxx.176
xxx.xxx.xxx.177
xxx.xxx.xxx.178
xxx.xxx.xxx.179
xxx.xxx.xxx.180
・・
xxx.xxx.xxx.249
xxx.xxx.xxx.250
xxx.xxx.xxx.251

1

2

3

4

Not
use

FINS

FINS

MC

Small

Large

Small

Detector
write

・
・

・
・

0 - 167
42 - 209
84 - 251
126 - 293
168 - 335
210 - 377
252 - 419
294 - 461
336 - 503
378 - 545
420 - 587
462 - 629
504 - 671
546 - 713
588 - 755
630 - 797
・・6846 - 7013
6888 - 7055
6930 - 7097
6972 - 7139
7014 - 7181
7056 - 7223
7098 - 7265
7140 - 7307
7182 - 7349
7224 - 7391
7266 - 7433
7308 - 7475
7350 - 7517
7392 - 7559
7434 - 7601
7476 - 7643
7518 - 7685
・・10416 - 10583
10458 - 10625

Detector
read

Detector
write

Detector
read

Detectorwrite

0 - 16710752 - 10839
0 - 167
42 - 209
10774 - 10861
42 - 209
84 - 251
10796 - 10883
84 - 251
126 - 293
10818 - 10905
126 - 293
168 - 335
10840 - 10927
168 - 335
210 - 377
10862 - 10949
210 - 377
252 - 419
10884 - 10971
252 - 419
294 - 461
10906 - 10993
294 - 461
336 - 503
10928 - 11015
336 - 503
378 - 545
10950 - 11037
378 - 545
420 - 587
10972 - 11059
420 - 587
462 - 629
10994 - 11081
462 - 629
504 - 671
11016 - 11103
504 - 671
546 - 713
11038 - 11125
546 - 713
588 - 755
11060 - 11147
588 - 755
630 - 797
11082 - 11169
630 - 797
・
・
・
・
・
・
・
・
6846 - 7013
14338 - 14425
6846 - 7013
6888 - 7055
14360 - 14447
6888 - 7055
6930 - 7097
14382 - 14469
6930 - 7097
6972 - 7139
14404 - 14491
6972 - 7139
7014 - 7181
14426 - 14513
7014 - 7181
7056 - 7223
14448 - 14535
7056 - 7223
7098 - 7265
14470 - 14557
7098 - 7265
7140 - 7307
14492 - 14579
7140 - 7307
7182 - 7349
14514 - 14601
7182 - 7349
7224 - 7391
14536 - 14623
7224 - 7391
7266 - 7433
14558 - 14645
7266 - 7433
7308 - 7475
14580 - 14667
7308 - 7475
7350 - 7517
14602 - 14689
7350 - 7517
7392 - 7559
14624 - 14711
7392 - 7559
7434 - 7601
14646 - 14733
7434 - 7601
7476 - 7643
14668 - 14755
7476 - 7643
7518 - 7685
14690 - 14777
7518 - 7685
・
・
・
・
・
・
・
・
10416 - 10583
16208 - 16295
10416 - 10583
10458 - 10625
16230 - 16317
10458 - 10625
IP address of the communication destination PLC

xxx: Product IP address

97 / 99

Detector
read
・
・
・
・
-

7. PLC communication

7-6 PLC communication setting specifications using this product<[PLC Mode]: [5] - [7]>Communication
mode[PLC Mode]
Default: 1
PLC Type
Type of Basic
Data
MemoryAddress
IP address
xxx.xxx.xxx.1
xxx.xxx.xxx.2
xxx.xxx.xxx.3
xxx.xxx.xxx.4
xxx.xxx.xxx.5
xxx.xxx.xxx.6
xxx.xxx.xxx.7
xxx.xxx.xxx.8
xxx.xxx.xxx.9
xxx.xxx.xxx.10
xxx.xxx.xxx.11
xxx.xxx.xxx.12
xxx.xxx.xxx.13
xxx.xxx.xxx.14
xxx.xxx.xxx.15
xxx.xxx.xxx.16

Detector
write

Detector
read

Detector
write

Detector
read

Detector
write

Detectorread

0 - 167
42 - 209
84 - 251
126 - 293
168 - 335
210 - 377
252 - 419
294 - 461
336 - 503
378 - 545
420 - 587
462 - 629
504 - 671
546 - 713
588 - 755
630 - 797

10752 - 10839
10774 - 10861
10796 - 10883
10818 - 10905
10840 - 10927
10862 - 10949
10884 - 10971
10906 - 10993
10928 - 11015
10950 - 11037
10972 - 11059
10994 - 11081
11016 - 11103
11038 - 11125
11060 - 11147
11082 - 11169

0 - 154 - 198 - 2312 - 27
16 - 31
20 - 35
24 - 39
28 - 43
32 - 47
36 - 51
40 - 55
44 - 59
48 - 63
52 - 67
56 - 71
60 - 751024 - 1039
1028 - 1043
1032 - 1047
1036 - 1051
1040 - 1055
1044 - 1059
1048 - 1063
1052 - 1067
1056 - 1071
1060 - 1075
1064 - 1079
1068 - 1083
1072 - 1087
1076 - 1091
1080 - 1095
1084 - 1099

0 - 154 - 198 - 2312 - 27
16 - 31
20 - 35
24 - 39
28 - 43
32 - 47
36 - 51
40 - 55
44 - 59
48 - 63
52 - 67
56 - 71
60 - 751024 - 1039
1028 - 1043
1032 - 1047
1036 - 1051
1040 - 1055
1044 - 1059
1048 - 1063
1052 - 1067
1056 - 1071
1060 - 1075
1064 - 1079
1068 - 1083
1072 - 1087
1076 - 1091
1080 - 1095
1084 - 1099

・
・

・
・

・
・

・
・

・
・

・
・

・
・

xxx.xxx.xxx.164
xxx.xxx.xxx.165
xxx.xxx.xxx.166
xxx.xxx.xxx.167
xxx.xxx.xxx.168
xxx.xxx.xxx.169
xxx.xxx.xxx.170
xxx.xxx.xxx.171
xxx.xxx.xxx.172
xxx.xxx.xxx.173
xxx.xxx.xxx.174
xxx.xxx.xxx.175
xxx.xxx.xxx.176
xxx.xxx.xxx.177
xxx.xxx.xxx.178
xxx.xxx.xxx.179
xxx.xxx.xxx.180

6846 - 7013
6888 - 7055
6930 - 7097
6972 - 7139
7014 - 7181
7056 - 7223
7098 - 7265
7140 - 7307
7182 - 7349
7224 - 7391
7266 - 7433
7308 - 7475
7350 - 7517
7392 - 7559
7434 - 7601
7476 - 7643
7518 - 7685

14338 - 14425
14360 - 14447
14382 - 14469
14404 - 14491
14426 - 14513
14448 - 14535
14470 - 14557
14492 - 14579
14514 - 14601
14536 - 14623
14558 - 14645
14580 - 14667
14602 - 14689
14624 - 14711
14646 - 14733
14668 - 14755
14690 - 14777

652 - 667
656 - 671
660 - 675
664 - 679
668 - 683
672 - 687
676 - 691
680 - 695
684 - 699
688 - 703
692 - 707
696 - 711
700 - 715
704 - 719
708 - 723
712 - 727
716 - 731

1676 - 1691
1680 - 1695
1684 - 1699
1688 - 1703
1692 - 1707
1696 - 1711
1700 - 1715
1704 - 1719
1708 - 1723
1712 - 1727
1716 - 1731
1720 - 1735
1724 - 1739
1728 - 1743
1732 - 1747
1736 - 1751
1740 - 1755

652 - 667
656 - 671
660 - 675
664 - 679
668 - 683
672 - 687
676 - 691
680 - 695
684 - 699
688 - 703
692 - 707
696 - 711
700 - 715
704 - 719
708 - 723
712 - 727
716 - 731

1676 - 1691
1680 - 1695
1684 - 1699
1688 - 1703
1692 - 1707
1696 - 1711
1700 - 1715
1704 - 1719
1708 - 1723
1712 - 1727
1716 - 1731
1720 - 1735
1724 - 1739
1728 - 1743
1732 - 1747
1736 - 1751
1740 - 1755

・
・

・
・

・
・

・
・

・
・

・
・

・
・

xxx.xxx.xxx.249
xxx.xxx.xxx.250
xxx.xxx.xxx.251

10416 - 10583
10458 - 10625

5

6

7

MC

FINS

MC

Large

Very Small

Very Small

16208 - 16295
992 - 1007
2016 - 2031
992 - 1007
16230 - 16317
996 - 1011
2020 - 2035
996 - 1011
IP address of the communication destination PLC

xxx: Product IP address

98 / 99

2016 - 2031
2020 - 2035

7. PLC communication

7-6 PLC communication setting specifications using this product

NOTE To make detailed communication settings in the Network screen of GAS DETECTOR MANAGER,
set [PLC Mode] in the product ETHERNET settings to [1]. (Refer to ‘4. PLC communication
settings’.)

CAUTION The PLC IP address is fixed at xxx.xxx.xxx.251. (xxx is the product IP address.)
 You cannot use the IP address of the PLC or IP addresses after xxx.xxx.xxx.252. (xxx is the product
IP address.) When [PLC Mode] is [2] - [7], four IP address areas are used by each unit of this product. Leave atleast four spaces for IP addresses when allocating them so that the areas used do not overlap.
 When setting Very Small, it is not possible to mix with other PLC Modes.

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7. PLC communication

7-6 PLC communication setting specifications using this product7-6-2 PLC Area settings
When [1] - [15] are set in [PLC Area], the following Network screen items are set automatically:
Refer to the following table for details of the settings:[PLC Area] setting value

Items automatically set
by [PLC Area] settings([1] - [15])NOTE Log on in Administrator mode to view the Network screen.

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7. PLC communication

7-6 PLC communication setting specifications using this product[PLC Mode](When [1] - [5])[PLC Area](PLC memory area)
Default: 3

FINS

MC

[PLC Mode](When [6] - [7])
FINS

MC

0

E0(0)

ZR(0)

E0(0)

ZR(0)

1

E1(0)

ZR(32768)

E0(2048)

ZR(2048)2

E2(0)ZR(65536)

E0(4096)

ZR(4096)3

E3(0)ZR(98304)

E0(6144)

ZR(6144)4

E4(0)ZR(131072)

E0(8192)

ZR(8192)5

E5(0)ZR(163840)

E0(10240)

ZR(10240)

6

E6(0)

ZR(196608)

E0(12288)

ZR(12288)

7

E7(0)

ZR(229376)

E0(14336)

ZR(14336)

8

E8(0)

ZR(262144)

E0(16384)

ZR(16384)

9

E9(0)

ZR(294912)

E0(18432)

ZR(18432)10

E10(0)

ZR(327680)

E0(20480)

ZR(20480)11

E11(0)ZR(360448)

E0(22528)

ZR(22528)12

E12(0)ZR(393216)

E0(24576)

ZR(24576)13

E13(0)ZR(425984)

E0(26624)

ZR(26624)14

E14(0)ZR(458752)

E0(28672)

ZR(28672)15

E15(0)ZR(491520)

E0(30720)

ZR(30720)

NOTE When using the [MC], note that the numbers in parentheses () are the offset values for the [Memory
Address].

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7. PLC communication

7-6 PLC communication setting specifications using this product

Example of communication setting) OMRON PLC

Gas detector 1

PLC

PLC

Detector

Detector

Mode

Area

write

read

3

3

E3

E3

0~41

10752~10773

GD-84D

E3

E3

A1

42~83

10774~10795

E3

E384~12510796~10817

E3

E3

126~16710818~10839

E3

E3

168~209

10840~10861

E3

E3

210~25110862~10883

-

-

Model

IP address

GD-70D

192.168.0.1

A2
Gas detector 2

192.168.0.2

3

3

B1

B2

Gas detector 3

GD-81D

Communication

OMRON

target PLC

CJ series

192.168.0.6

3

3

192.168.0.251--*For both devices, the subnet mask should be "255.255.255.0".

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7. PLC communication

7-6 PLC communication setting specifications using this product

Example of communication setting) MITSUBISHI ELECTRIC Corporation PLC
PLC

PLC

Detector

Detector

Mode

Area

write

read

GD-84D

ZR

ZR

A165536~65577

76288~76309

GD-84D

ZR

ZR

65578~65619

76310~76331

ZR

ZR

B1

65620~65661

76332~76353

GD-84D

ZR

ZR

B2

65662~65703

76354~76375

GD-84D

ZR

ZR

A1

65704~65745

76376~76397

ZR

ZR

65746~65787

76398~76419

ZR

ZR

65788~65829

76420~76441

ZR

ZR

65830~65871

76442~76463

-

-

Model

Gas detector 1

A2
GD-84D

IP address

192.168.0.1

5

2

A2
Gas detector 2

192.168.0.5

5

2

B1

B2
MITSUBISHI
Communication

ELECTRIC

target PLC

Corporation

192.168.0.251-

Ｑ series*For both devices, the subnet mask should be "255.255.255.0".

103 / 99-

Revision History
Issue

Revision details

Issue date

0First issue

1/25/2021

１

PLC memory saving function added.

1/23/2023