COMMUNICATION INSTRUCTION MANUALJCS, JCM, JCR, JCD-33A (C5)No.JC3CE11 2013.01
This manual contains instructions for the communication functions, operations and notes when operating the
JCS, JCM, JCR and JCD-33A series.
To prevent accidents arising from the misuse of this controller, please ensure the operator receives thismanual.

Warning
Turn the power supply to the instrument off before wiring or checking it.
Working on or touching the terminal with the power switched on may result in severe injury
or death due to electric shock.

1. System Configuration
Communication
converter
IF-400RS-232C
RS-485JCx-33A
No. 0

JCx-33A
No. 30JCx-33A
No. 1

Host computer(Fig. 1-1)

2. Wiring

When using communication converter IF-400• D-sub 9-pin connector:
IF-400(sold separately)
RS-232C
RS-485

Host computer

TXD

3

RXD

2

GND

5

DCD

1

DTR

4

DSR

6

RTS

7

CTS

8

RI

9

JCS-33A (Max. 31 units)

13 YA(-)
14 YB(+)
15 SG

4
3
1
6

Shielded wire
FG

Shielded wireFG

D-sub 9-pin connector

13 YA(-)
14 YB(+)
15 SG

Shielded wire
Shielded wire
CDM
FG

(Fig. 2-1)
1

13 YA(-)
14 YB(+)
15 SG

• D-sub 25-pin connector:
IF-400(sold separately)
RS-232C
RS-485

Host computer

TXD

2

RXD

3

SG

7

FG

1

RTS

4

CTS

5

DSR

6

4
3
1
6

Shielded wire

To JCS-33A

DTR 20CD

8D-sub 25-pin connector

CDM(Fig. 2-2)

Shielded wire
Connect only one end of the shielded wire to the FG terminal so that current cannot flow to theshielded wire. (If both ends of the shielded wire are connected to the FG terminal, the circuit will beclosed between the shielded wire and the ground. As a result, current will run through the shielded
wire, and this may cause noise.) Be sure to ground the FG terminal.
Recommended cable: OTSC-VB 2PX0.5SQ (made by Onamba Co., Ltd.) or equivalent(Use a twisted pair cable.)
Terminator (Terminal resistor)
Communication converter IF-400 (sold separately) has a built-in terminator.
The terminator is mounted at the end of the wire when connecting a personal computer with multiple
peripheral devices. The terminator prevents signal reflection and disturbance.
Do not connect the terminator to the communication line because each JCx-33A has built-in pull-up
and pull-down resistors instead of a terminator.

3. Communication Settings
Press thekey for approx. 3 seconds while holding down the
key.
The unit enters Auxiliary function setting mode 1.
Make a selection using theorkey, and register the value by pressing theCharacter

key.

Name, Function, Setting range
Default
Auxiliary function setting mode 1 (Set value lock selection)
Press thekey 4 times.
Communication protocol selection item appears.
Communication protocol
Shinko protocol• Selects communication protocol.
•: Shinko protocol,: Modbus ASCII mode,: Modbus RTU mode
Instrument number0• The instrument numbers should be set one by one when multiple instruments areconnected in Serial communication, otherwise communication is impossible.
• Setting range: 0 to 95
Communication speed
9600bps• Selects a communication speed equal to that of the host computer.
•: 2400bps,: 4800bps,: 9600bps,: 19200bps
ParityEven• Selects parity.
• Not available if Shinko protocol is selected in [Communication protocol].
•: No parity,: Even,: Odd
Stop bit1• Selects the stop bit.
• Not available if Shinko protocol is selected in [Communication protocol].
• 1 or 22

4. Communication Procedure

Communication starts with command transmission from the host computer (hereafter Master) andends with the response of the JCx-33A (hereafter Slave).
• Response with data
MasterSlave
When the master sends the reading command, the slave
Command
responds with the corresponding set value or current status.
Data• Acknowledgement
When the master sends the setting command, the slave
Command
responds by sending acknowledgement after processing
is terminated.
Acknowledgement• Negative acknowledgement
When the master sends a non-existent command or value
Commandout of the setting range, the slave returns a negative
Negative
acknowledgement.
acknowledgement• No response
The slave will not respond to the master in the following cases:• Global address (Shinko protocol) is set.
Command• Broadcast address (Modbus protocol) is set.
• Communication error (framing error, parity error)
No response• Checksum error (Shinko protocol), LRC discrepancy (Modbus(Fig.4-1)
ASCII mode), CRC-16 discrepancy (Modbus RTU mode)
Communication timing of the RS-485 (C5 option)
Master side (Take note while programming)
Set the program so that the master can disconnect the transmitter from the communication line within a
1 character transmission period after sending the command in preparation for reception of the response
from the slave. To avoid the collision of transmissions between the master and the slave, send the next
command after carefully checking that the master has received the response.
If a response to the command is not returned due to communication errors, set the Retry Processing tosend the command again. (Retry twice or more is recommended.)
Slave side
When the slave starts transmission through the RS-485 communication line, the slave is arranged so as
to provide an idle status (mark status) transmission period of 1 or more characters before sending the
response to ensure synchronization on the receiving side. The slave is arranged so as to disconnect thetransmitter from the communication line within a 1 character transmission period after sending the response.

5. Shinko Protocol

5.1 Transmission mode
Shinko protocol is composed of ASCII codes.
Hexadecimal (0 to 9, A to F), which is divided into high order (4-bit) and low order (4-bit) out of 8-bit
binary data in command is transmitted as ASCII characters.
Data format
Start bit: 1 bit
Data bit: 7 bits
Parity: Even
Stop bit: 1 bit
Error detection: Checksum
5.2 Command configuration
All commands are composed of ASCII. The data (set value, decimal number) is represented byhexadecimal numbers. Negative numbers are represented in 2's complement.
Numerals written below the command represent number of characters.
(1) Setting command
Header(02H)
1

Sub
address(20H)
1Commandtype (50H)
1

Data
item
4

Sub
address(20H)
1Commandtype (20H)
1

Data
item
4

1

Sub
address(20H)
1Commandtype (20H)
1

Data
item
4

Address

Checksum

12

Delimiter(03H)
1

Address

Error
code
1

Address
1(2) Reading command
Header(02H)
1

Address
1(3) Response with data
Header(06H)1

Address(4) Acknowledgement
Header(06H)
1(5) Negative acknowledgement
Header(15H)
1

1

Checksum2

Checksum4

2

Checksum

Delimiter
(03H)
1

3

Data

2

Delimiter(03H)
1

Delimiter
(03H)
1

Data

Checksum

42

Delimiter(03H)
1

Header:

Control code to represent the beginning of the command or the response.
ASCII codes are used.
Setting command, Reading command: STX (02H) fixed
Response with data, Acknowledgement: ACK (06H) fixed
Negative acknowledgement:
NAK (15H) fixed
Address (Instrument number): Numbers by which the master discerns each slave.
Instrument number 0 to 94 and Global address 95.
ASCII codes (20H to 7FH) are used by adding 20H to instrument numbers 0 to 95(00H to 5FH).
95 (7FH) is called the Global address, which is used when the same command issent to all the slaves connected. However, a response is not returned.
Sub address:
20H fixed
Command type: Code to discern Setting command (50H) and Reading command (20H).
Data item:
Data classification of the command object.
Composed of hexadecimal 4 digits, using ASCII.
(Refer to “7. Communication command table”.)
Data:
The contents of data (set value) differs depending on the setting command.
Composed of hexadecimal 4 digits, using ASCII.
(Refer to “7. Communication command table”.)
Checksum:
2-character data to detect communication errors. (Refer to “5.3 Checksum calculation”.)
Delimiter:Control code to represent the end of command. ASCII code ETX (03H) fixed.
Error code:
Represents an error type with ASCII codes.
1 (31H)-----Non-existent command
2 (32H)-----Not used
3 (33H)-----Set value outside the setting range
4 (34H)-----Status unable to be set (e.g. AT is performing.)
5 (35H)-----During setting mode by keypad operation
5.3 Checksum calculation
Checksum is used to detect receiving errors in the command or data.
Set the program for the master side as well to calculate the checksum of the response data from theslaves so that any communication errors can be checked.
The ASCII code (hexadecimal) corresponding to the characters which range from the address to that
before the checksum is converted to binary notation, and the total value is calculated.
The lower 2-digits of the total value are converted to 2’s complement, and then to hexadecimal figures,that is, ASCII code for the checksum.
Checksum calculation example
SV1: 600 (0258H)
Address (instrument number): 0 (20H)• 1’s complement: Reverse each binary bit. 0 will become 1 and vice versa.
• 2’s complement: Add 1 to 1’s complement.
Checksum calculation range[e.g.]
P

STX

0

0

0

1

E

0

2

5

8

30H

32H

35H

38H

0

ETX

[Characters above are represented in ASCII.]
02H

20H

20H

50H

30H

30H

30H

31H

[Hexadecimal][Binary]
20H0010 0000
20H
0010 0000
50H
0101 0000
30H
0011 0000
30H
0011 0000
30H
0011 0000
31H
0011 0001
30H
0011 0000
32H
0011 0010
35H
0011 0101
0011 1000+ 38H
10 0010 0000

45H 30H

Checksum[1's complement]+[2's complement][Hexadecimal][ASCII]

1101 1111
11110 0000
E

0

45H

30H

Checksum

403H6. Modbus Protocol

6.1 Transmission mode
There are 2 transmission modes (ASCII and RTU) in Modbus protocol.
6.2 ASCII mode
Hexadecimal (0 to 9, A to F), which is divided into high order (4-bit) and low order (4-bit) out of 8-bit
binary data in command is transmitted as ASCII characters.
Data format
Start bit: 1 bit
Data bit: 7 bits
Parity: Even/Odd/No parity (Selectable)
Stop bit: 1 bit/2 bits (Selectable)
Error detection : LRC (Longitudinal Redundancy Check)
Data interval: 1 second or less
(1) Message configuration
ASCII mode message is configured to start by Header [: (colon)(3AH)] and end by Delimiter [CR(carriage return) (0DH) + LF (Line feed)(0AH)].
Header(:)

Slaveaddress

Function
code

Error check
LRC

Data

Delimiter(CR)

Delimiter(LF)(2) Slave address
Slave address is an individual instrument number on the slave side, and is set within the range 0 to 95(00H to 5FH).
The master identifies slaves by the slave address of the requested message.
The slave informs the master which slave is responding to the master by placing its own address in the
response message.
[Slave address 0 (00H, broadcast address) can identify all the slaves. However slaves do not respond.](3) Function code
The function code is the command code for the slave to undertake one of the following actions (Table 6.2-1).
(Table 6.2-1)
Function code
Contents
03 (03H)
Reading the set value and information from slaves
06 (06H)
Setting to slaves
The function code is used to discern whether the response is normal (acknowledgement) or if any error(negative acknowledgement) has occurred when the slave returns the response message to the master.
When acknowledgement is returned, the slave simply returns the original function code.
When negative acknowledgement is returned, the MSB of the original function code is set as 1 for the
response. (For example, when the master sends request message setting 10H for the function code by
mistake, slave returns 90H by setting the MSB to 1, because the former is an illegal function.)
For negative acknowledgement, the exception codes (Table 6.2-2) below are set to the data of the
response message and returned to the master in order to inform it of what kind of error has occurred.
(Table 6.2-2)
Exception code
Contents
1 (01H)
Illegal function (Non-existent function)
2 (02H)
Illegal data address (Non-existent data address)
3 (03H)
Illegal data value (Value out of the setting range)
17 (11H)
Shinko error code 4 (Status unable to be set)18 (12H)
Shinko error code 5 (During setting mode by keypad, etc)
(4) Data
Data differs depending on the function code.
A request message from the master is composed of a data item, amount of data and setting data.
A response message from the slave is composed of a number of bytes, data and exception codes innegative acknowledgements. The effective range of data is –32768 to 32767 (8000H to 7FFFH).
(5) Error check of ASCII mode
After calculating LRC (Longitudinal Redundancy Check) from the slave address to the end of data, thecalculated 8-bit data is converted to two ASCII characters and are appended to the end of the message.
How to calculate LRC
1 Create a message in RTU mode.
2 Add all the values from the slave address to the end of data. This is assumed as X.
3 Make a complement for X (bit reverse). This is assumed as X.
4 Add a value of 1 to X. This is assumed as X.
5 Set X as an LRC to the end of the message.
6 Convert the whole message to ASCII characters.
5(6) Message example of ASCII mode
Numerals written below the command represent the number of characters.
1 Reading (Slave address 1, SV)• A request message from the masterAmount of data means how many data items are to be read. It is fixed as (30H 30H 30H 31H).
HeaderSlaveaddress

Function
code

(3AH)

(30H 31H)(30H 33H)

1

2

2

Data item[0001H]

Amount of data
[0001H](30H 30H 30H 31H) (30H 30H 30H 31H)

4

Error check
LRC

Delimiter(46H 41H)(0DH 0AH)

2

2

4• Response message from the slave in normal status [When SV=600 (0258H)]
The number of response bytes means the number of bytes of data which has been read.
It is fixed as (30H 32H).
Slave
address

Function
code

(3AH)

(30H 31H)(30H 33H)

1

2

2

HeaderNumber of
response bytes

Data[0258H]

Error check
LRC

Delimiter(30H 32H)(30H 32H 35H 38H)

(41H 30H)(0DH 0AH)

2

4

2

2

[02H]

• Response message from the slave in exception (error) status (When a data item has been mistaken)
The function code MSB is set to 1 for the response message in exception (error) status (83H).
The exception code (02H: Non-existent data address) is returned.
HeaderSlaveaddress

Functioncode

Exception code
[02H]

Error check
LRC

Delimiter(3AH)(30H 31H)(38H 33H)(30H 32H)(37H 41H)(0DH 0AH)

1

2

2

2

2

2

Setting [Slave address 1, SV=600• A request message from the master2(0258H)]HeaderSlaveaddress

Function
code

(3AH)

(30H 31H)(30H 36H)

1

2

2

4

4

HeaderSlaveaddress

Function
code

Data item[0001H]

Data[0258H](3AH)(30H 31H)(30H 36H)

1

2

2

Data item[0001H]

Data[0258H](30H 30H 30H 31H) (30H 32H 35H 38H)

Error check
LRC

Delimiter(39H 45H)(0DH 0AH)

22

Error check
LRC

Delimiter(39H 45H)(0DH 0AH)

2

2• Response message from the slave in normal status(30H 30H 30H 31H)(30H 32H 35H 38H)

4

4

• Response message from the slave in exception (error) status (When a value out of the setting
range is set.)
The function code MSB is set to 1 for the response message in exception (error) status (86H).
The exception code (03H: Value out of the setting range) is returned.
HeaderSlaveaddress

Functioncode

Exception code
[03H]

Error check
LRC

Delimiter(3AH)(30H 31H)(38H 36H)(30H 33H)(37H 36H)(0DH 0AH)

1

2

2

2

2

2

6.3 RTU mode
8-bit binary data in command is transmitted as it is.
Data format
Start bit: 1 bit
Data bit: 8 bits
Parity: Even/Odd/No parity (Selectable)
Stop bit: 1 bit/2 bits (Selectable)
Error detection : CRC-16 (Cyclic Redundancy Check)
Data interval: 3.5 characters transmission time or less
(1) Message configuration
RTU mode is configured to start after idle time is processed for more than a 3.5 charactertransmissions and end after idle time is processed for more than a 3.5 character transmissions.
3.5 idle
characters

Slave
address

Function
code

Data

Error check
CRC-16

3.5 idle
characters(2) Slave address
Slave address is an individual instrument number on the slave side and is set within the range
0 to 95 (00H to 5FH).
The master identifies slaves by the slave address of the requested message.
The slave informs the master which slave is responding to the master by placing its own addressin the response message. Slave address 00H (broadcast address) can identify all the slaves connected.
However slaves do not respond.
6(3) Function code
The function code is the command code for the slave to undertake one of the following actions (Table 6.3-1).
(Table 6.3-1)
Function code
Contents
03 (03H)
Reading the set value and information from slaves
06 (06H)
Setting to slaves
Function code is used to discern whether the response is normal (acknowledgement) or if any error(negative acknowledgement) has occurred when the slave returns the response message to the master.
When acknowledgement is returned, the slave simply returns the original function code.
When negative acknowledgement is returned, the MSB of the original function code is set as 1 forthe response. (For example, when the master sends request message setting 10H for the function codeby mistake, slave returns 90H by setting the MSB to 1, because the former is an illegal function.)
For negative acknowledgement, the exception codes (Table 6.3-2) below are set to the data of
response message and returned to the master in order to inform it of what kind of error has occurred.
(Table 6.3-2)
Exception code
Contents
1 (01H)
Illegal function (Non-existent function)
2 (02H)
Illegal data address (Non-existent data address)
3 (03H)
Illegal data value (Value out of the setting range)
17 (11H)
Shinko error code 4 (Status unable to be set)18 (12H)
Shinko error code 5 (During setting mode by keypad, etc)
(4) Data
Data differs depending on the function code.
A request message from the master side is composed of a data item, amount of data and setting data.
A response message from the slave side is composed of a number of bytes, data and exception codein negative acknowledgement. The effective range of data is –32768 to 32767 (8000H to 7FFFH).
(5) Error check of RTU mode
After calculating CRC-16 (Cyclic Redundancy Check) from the slave address to the end of the data,
the calculated 16-bit data is appended to the end of the message in sequence from low order to highorder.
How to calculate CRC-16
In the CRC-16 system, the information is divided by the polynomial series. The remainder is added tothe end of the information and transmitted. The generation of a polynomial series is as follows.
(Generation of polynomial series: X16 + X 15 + X 2 + 1)
1 Initialize the CRC-16 data (assumed as X) (FFFFH).
2 Calculate exclusive OR (XOR) with the 1st data and X. This is assumed as X.
3 Shift X one bit to the right. This is assumed as X.
4 When a carry is generated as a result of the shift, XOR is calculated by X of 3 and the fixedvalue (A001H). This is assumed as X.
If a carry is not generated, go to step 5 .
5 Repeat steps 3 and 4 until shifting 8 times.
6 XOR is calculated with the next data and X. This is assumed as X.
7 Repeat steps 3 to 5 .
8 Repeat steps 3 to 5 up to the final data.
9 Set X as CRC-16 to the end of message in sequence from low order to high order.
(6) Message example of RTU mode
Numerals written below the command represent number of characters.
1 Reading (Slave address 1, SV)• A request message from the masterAmount of data means how many data items are to be read. It is fixed as 0001H.
3.5 idle
characters

Slave
address(01H )
1

Functioncode(03H )
1

Am ount of
data(0001H)
2

Data item(0001H)
2

Error check
CR C-16(D5C AH )2

3.5 idle
characters• Response message from the slave in normal status [When SV=600 (0258H)]
The number of response bytes means the number of bytes of data which have been read.
It is fixed as 02H.
3.5 idle
characters

Slave
address(01H)1

Function
code
(03H)
1

Number of
response bytes

Data

(02H)
1

(0258H)
2

7

Error check
CRC-16(B8DEH)2

3.5 idle
characters• Response message from the slave in exception (error) status (When a data item is mistaken)
The function code MSB is set to 1 for the response message in exception (error) status (83H).
The exception code (02H: Non-existent data address) is returned.
3.5 idle
characters

Slave
address(01H)1

Function
code
(83H)
1

Slave
address(01H)1

Function
code
(06H)
1

Slave
address(01H)1

Function
code
(06H)
1

Slave
address(01H)1

Function
code
(86H)
1

Setting [Slave address 1, SV=600• A request message from the master2

3.5 idle
characters

Exception
code
(02H)
1

Error check
CRC-16(C0F1H)
2

Data item

Data(0001H)
2(0258H)
2

Data item

Data(0001H)
2(0258H)
2(0258H)]• Response message from the slave in normal status
3.5 idle
characters

3.5 idle
characters

Error check
CRC-16(D890H)
2

Error check
CRC-16(D890H)2

3.5 idle
characters

3.5 idle
characters• Response message from the slave in exception (error) status (When a value out of the setting
range is set)
The function code MSB is set to 1 for the response message in exception (error) status (86H).
The exception code (03H: Value out of the setting range) is returned.
3.5 idle

characters

Exception
code
(03H)
1

Error check
CRC-16(0261H)2

3.5 idle

characters

7. Communication Command Table
Notes about setting, reading command• The data (set value, decimal) is converted to hexadecimal figures. A negative number is represented
by 2's complement.
• When connecting multiple slaves, the address (instrument number) must not be duplicated.
• Do not use undefined Data items. If they are used, negative acknowledgement will be returned or arandom value will be set or returned, resulting in malfunction.
• Modbus protocol uses Holding Register addresses. The Holding Register addresses are created asfollows. A Shinko command data item is converted to decimal number, and the offset of 40001 is
added. The result is the Holding Register address.
Using Data item 0001H (SV1) as an example: Data item in the sending message is 0001H, however,
Modbus protocol Holding Register address is 40002 (1 + 40001).
Setting command• Up to 1,000,000 (one million) entries can be stored in memory. If the number of settings exceeds thelimit, the data will not be saved. So frequent transmission via communication is not recommended.
(If a value the same as a previously set value is set, it will not be written in the non-volatile IC memory.)• Setting range of each item is the same as that of keypad operation.
• When the data (set value) has a decimal point, a whole number (hexadecimal) without a decimal point is used.
• If the alarm type is changed during selections of Data items 0023H (A1 type) or 0024H (A2 type), thealarm value will default to “0”. Alarm output status will also be initialized.
• Settings via software communication are possible while in set value lock status. If Lock 3 is selected,
data will not be saved in the memory. This is why data returns to its previous value after power-off.
• Although the options are not ordered, setting the items for options is possible using the setting command.
However, they will not function.
• The Instrument Numbers and Communication Speed of the slave cannot be set by software communication.
• When sending a command by Global address [95 (7FH)], the same command is sent to all the slavesconnected. However, the response is not returned.
Reading command• When the data (set value) has a decimal point, a whole number (hexadecimal) without a decimal point
is used for a response.
8

Shinkocommandtype
20H/50H
20H/50H

Modbusfunction
Data itemcode
03H/06H 0001H: SV1
03H/06H 0003H: AT/Auto-reset

20H/50H
20H/50H
20H/50H
20H/50H
20H/50H
20H/50H
20H/50H
20H/50H
20H/50H
20H/50H
20H/50H
20H/50H

03H/06H
03H/06H
03H/06H
03H/06H
03H/06H
03H/06H
03H/06H
03H/06H
03H/06H
03H/06H
03H/06H
03H/06H

0004H: OUT1 proportional band
0005H: OUT2 proportional band
0006H: Integral time
0007H: Derivative time
0008H: OUT1 proportional cycle
0009H: OUT2 proportional cycle
000BH: A1 value
000CH: A2 value
000FH: HB(Heater burnout alarm) value
0010H: LA (Loop break alarm) time0011H: LA (Loop break alarm) span
0012H: Set value lock20H/50H
20H/50H
20H/50H
20H/50H
20H/50H
20H/50H
20H/50H

03H/06H
03H/06H
03H/06H
03H/06H
03H/06H
03H/06H
03H/06H

0013H: SV high limit
0014H: SV low limit
0015H: Sensor correction value
0016H: Overlap/Dead band
0018H: Scaling high limit
0019H: Scaling low limit
001AH: Decimal point place

20H/50H
20H/50H
20H/50H
20H/50H
20H/50H

03H/06H
03H/06H
03H/06H
03H/06H
03H/06H

001BH: PV filter time constant
001CH: OUT1 high limit
001DH: OUT1 low limit
001EH: OUT1 ON/OFF hysteresis
001FH: OUT2 action mode

20H/50H
20H/50H
20H/50H
20H/50H

03H/06H
03H/06H
03H/06H
03H/06H

0020H: OUT2 high limit
0021H: OUT2 low limit
0022H: OUT2 ON/OFF hysteresis
0023H: A1 type0024H: A2 type

20H/50H
20H/50H
20H/50H
20H/50H
20H/50H

03H/06H
03H/06H
03H/06H
03H/06H
03H/06H

0025H: A1 hysteresis
0026H: A2 hysteresis
0029H: A1 action delay time
002AH: A2 action delay time
0037H: Control output OFF

20H/50H

03H/06H 0038H: Auto/Manual control

20H/50H
20H/50H

03H/06H 0039H: Manual control MV
03H/06H 0040H: A1 Energized/De-energized

20H/50H

03H/06H 0041H: A2 Energized/De-energized

Data

9

SV
0000H: Cancel
0001H: Perform
Set value
Set value
Set value
Set value
Set value
Set value
Set value
Set value
Set value
Set value
Set value
0000H: Unlock
0001H: Lock 1
0002H: Lock 2
0003H: Lock 3
Set value
Set value
Set value
Set value
Set value
Set value
0000H: XXXX (No decimal point)
0001H: XXX.X (1 digit after the point)
0002H: XX.XX (2 digits after the point)
0003H: X.XXX (3 digits after the point)Set value
Set value
Set value
Set value
0000H: Air cooling
0001H: Oil cooling
0002H: Water coolingSet value
Set value
Set value
0000H: No alarm action
0001H: High limit alarm
0002H: Low limit alarm
0003H: High/Low limits alarm
0004H: High/Low limit range alarm
0005H: Process high alarm
0006H: Process low alarm
0007H: High limit alarm with standby
0008H: Low limit alarm with standby
0009H: H/L limits alarm with standby
Set value
Set value
Set value
Set value
0000H: ON
0001H: OFF
0000H: Automatic control
0001H: Manual control
Set value
0000H: Energized
0001H: De-energized
0000H: Energized
0001H: De-energizedShinkoModbuscommand function
Data item
type
code
20H/50H 03H/06H 0044H: Input type

20H/50H

03H/06H 0045H: Direct/Reverse action

20H/50H
20H/50H
20H/50H

03H/06H 0047H: AT bias
03H/06H 0048H: ARW (anti-reset windup)
03H/06H 006FH: Key Lock

50H

06H

20H
20H
20H
20H

03H
03H
03H
03H

0070H: Key operation change flagclearing
0080H: PV reading
0081H: OUT1 MV reading
0082H: OUT2 MV reading
0085H: Status flag reading

10

Data
0000H: K[–200 to 1370 ]
0001H: K[–199.9 to 400.0 ]0002H: J[–200 to 1000 ]
0003H: R[0 to 1760 ]
0004H: S[0 to 1760 ]
0005H: B[0 to 1820 ]
0006H: E[–200 to 800 ]
0007H: T[–199.9 to 400.0 ]0008H: N[–200 to 1300 ]
0009H: PL[0 to 1390 ]000AH: C (W/Re5-26) [0 to 2315 ]
000BH: Pt100[–199.9 to 850.0 ]000CH: JPt100 [–199.9 to 500.0 ]000DH: Pt100[–200 to 850 ]000EH: JPt100[–200 to 500 ]
000FH: K[–320 to 2500 ]
0010H: K[–199.9 to 750.0 ]0011H: J[–320 to 1800 ]
0012H: R[0 to 3200 ]0013H: S[0 to 3200 ]0014H: B[0 to 3300 ]
0015H: E[–320 to 1500 ]
0016H: T[–199.9 to 750.0 ]0017H: N[–320 to 2300 ]0018H: PL[0 to 2500 ]
0019H: C (W/Re5-26) [0 to 4200 ]001AH: Pt100[–199.9 to 999.9 ]001BH: JPt100 [–199.9 to 900.0 ]001CH: Pt100[–300 to 1500 ]
001DH: JPt100[–300 to 900 ]
001EH: 4 to 20mA DC [–1999 to 9999]
001FH: 0 to 20mA DC [–1999 to 9999]
0020H: 0 to 1V DC [–1999 to 9999]
0021H: 0 to 5V DC [–1999 to 9999]
0022H: 1 to 5V DC [–1999 to 9999]
0023H: 0 to 10V DC [–1999 to 9999]
0000H: Heating (Reverse action)
0001H: Cooling (Direct action)
Set value
Set value
0000H: Key enabled
0001H: Key Lock
0000H: No action
0001H: Clear all
Current PV (process variable)
OUT1 MV
OUT2 MV
0000 0000 0000 0000
215
to
20
0
2 digit: OUT1
0: OFF 1: ON
21 digit: OUT2
0: OFF 1: ON
22 digit: A1 output
0: OFF 1: ON
23 digit: A2 output
0: OFF 1: ON
24 digit: Not used (Always 0)
25 digit: Not used (Always 0)
26 digit: HB (Heater burnout alarm)
output0: OFF 1: ON(For sensor burnout, 0: OFF)

ShinkoModbuscommand function
Data item
type
code
20H
03H
0085H: Status flag

Data
27 digit: LA (Loop break alarm) output
0: OFF 1: ON
28 digit: Overscale
0: OFF 1: ON
29 digit: Underscale
0: OFF 1: ON
210 digit: Control output OFF
0: ON
1: OFF
211 digit: AT/Auto-reset
0: OFF 1: During AT/Auto-reset
212 digit: OUT/OFF key function
0: Control output OFF
1: Auto/Manual control
213 digit: Not used (Always 0)
214 digit: Auto/Manual control
0: Automatic 1: Manual
215 digit: Change in key operation
0: No 1: Yes

Notes about programming monitoring software
How to speed up the scan time
When monitoring multiple units of JCx-33A, set the program so that the requisite minimum pieces of datasuch as PV (0080H), OUT1 MV (0081H), status flag (0085H), etc. can be read, and for other data, set the
program so that they can be read only when their set value has changed. This will speed up the scan time.
How to read the set value change by the front keypad operation
If any set value is changed by keypad operation, the JCx-33A sets the [Status flag (0085H) 2 15:
Change in key operation] to [Yes (1)].
There are 2 methods of reading the set value change by the front keypad as follows.
Reading method 1(1) On the software side, check that [Status flag (0085H) 215: Change in key operation] has been set
to [Yes (1)], then read all set values.
(2) Clear the [Status flag (0085H) 215: Change in key operation], by setting the [Key operation
change flag clearing (0070H)] to [Clear all (0001H)].
If [Key operation change flag clearing (0070H)] is set to [Clear all (0001H)] during the setting mode of theJCx-33A, Error code 5 (35H, Shinko protocol) or Exception Code 18 (12H, Modbus protocol) will be
returned as a negative acknowledgement. And [Status flag (0085H) 215: Change in key operation]cannot be cleared. Set a program so that all set values can be read until acknowledgement is returned.
(3) Read all set values again after acknowledgement is returned.
Reading method 2(1) On the software side, check that [Status flag (0085H) 215: Change in key operation] has been set
to [Yes (1)], then set the [Key operation change flag clearing (0070H)] to [Clear all (0001H)].
(2) Set the program depending on the acknowledgement or negative acknowledgement as follows.
When acknowledgement is returned:
Consider it as settings completed, and read all set values.
When Error code 5 (35H, Shinko protocol) or Exception code 18 (12H, Modbus protocol) is
returned as a negative acknowledgement:
Consider it as still in setting mode, and read the requisite minimum pieces of data such as PV(0080H), OUT1 MV (0081H), status flag (0085H), etc., then return to step (1).
Thus, programs which do not affect the scan time can be created using the methods described above,even if set values on the monitoring software will not be updated until settings are complete.
How to read PID parameters after AT (auto-tuning) finishes
The JCx-33A sets [Status flag (0085H) 211: AT/Auto-reset] to [During AT/Auto-reset (1)] while AT is
performing. After AT is finished, PID parameters are updated.
On the software side, read the parameters such as P, I, D, ARW after checking that [Status flag
(0085H) 211: AT/Auto-reset] has been set to [OFF (0)].
Note when sending all set values simultaneously• When changing alarm types during A1 type selection (0023H) or A2 type selection (0024H), alarm
value will revert to “0”. First, send the selected alarm type, then send the alarm value.
• When changing input types during Input type selection (0044H), the set values such as SV, OUT1 proportional band, A1 value, etc. will be initialized. First, send the selected input type, then send other set values.
11When communicating with a PLC
To communicate with a PLC, use a Shinko PLC Interface Unit SIF-400.
No programming is needed for connection.
PLCs corresponding to the SIF-400, its manufacturer and host link units:
PLC manufacturer
PLC model
Host link unit model
Mitsubishi Electric Corp. MELSEC A (A, AnA)
AJ71UC24
Q series, QnA series
A1SJ71UC24-R2/R4/PRF
MELSEC FX2N series
A1SJ71C24-R2/R4/PRF, QJ71C24
Omron Corp.
SYSMAC C200H series LK201-V1, LK202-V1, CS1W-SCU21-V1,
CS series, CJ series
CJ1W-SCU21, CJ1W-SCU41
Fuji Electric Co., Ltd.
MICREX-F series
NC1L-RS2, NC1L-RS4
Yokogawa Electric Corp. FA-M3 series
F3LC11-1F, F3LC11-1N, F3LC12-1F, F3LC11-2N
LG Industrial Systems
MASTER-K series
G7L-CUEB, G7L-CUEC

8. Specifications
Cable length:

Max. communication distance: 1.2km
Cable resistance: Within 50 (Terminator is not necessary, but if used, use
120 or more on one side.)
Communication line:
EIA RS-485
Communication method: Half-duplex communication
Communication speed: 9600bps (2400, 4800, 9600, 19200bps) Selectable by keypad
Synchronization method: Start-stop synchronization
Code form:
ASCII, binary
Error correction:
Command request repeat system
Error detection:
Parity, checksum (Shinko protocol), LRC (Modbus ASCII), CRC-16 (Modbus RTU)
Data format
Communication protocol Shinko protocol
Modbus ASCII
Modbus RTU
Start bit1
1
1
Data bit
7
7
8
ParityYes (Even)
Yes (Even, Odd), No parity Yes (Even, Odd), No parity
Stop bit1
1 or 2
1 or 2

9. Troubleshooting
If any malfunctions occur, refer to the following items after checking that power is being supplied tothe master and the slave.
• Problem: Communication failure
Check if any of the following have occurred:
The connection or wiring of the communication cable is not secure.
Burnout or imperfect contact on the communication cable and the connector.
Communication speed of the slave does not match that of the master.
The data bit, parity and stop bit of the master do not correspond to those of the slave.
The instrument number (address) of the slave does not correspond to that of the command.
The instrument numbers (addresses) are duplicated in multiple slaves.
Make sure that the program is appropriate for the transmission timing.

• Problem: Although communication is occurring, the response is 'NAK'.
Check if any of the following have occurred:
A non-existent command code has been sent.
The setting command data exceeds the setting range of the slave.
The controller cannot be set when functions such as AT are performing.
The JCx-33A is in the front keypad operation setting mode.
For all other malfunctions, please contact our main office or dealers.

SHINKO TECHNOS CO., LTD.
OVERSEAS DIVISION
Head Office : 2-5-1, Senbahigashi, Minoo, Osaka, Japan
http://www.shinko-technos.co.jp
URL:
Tel : 81-72-727-6100
E-mail:overseas@shinko-technos.co.jp
Fax: 81-72-727-7006
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