DCL-33A DC (C5)COMMUNICATION INSTRUCTION MANUAL

No.DCL3CDCE2 2014.03
This manual contains instructions for the communication functions, operations and notes when operating theDCL-33A DC. To prevent accidents arising from the misuse of this controller, please ensure the operator
receives this manual.

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
When using communication converter IF-400
Host computer

Communication converter IF-400 (sold separately)
RS-232C
RS-485

DCL-33A DC
No.0

2. Wiring

DCL-33A DC
No.1

DCL-33A DC
No.30(Fig. 1-1)

When using communication converter IF-400• D-sub 9-pin connector:
IF-400(sold separately)
DCL-33A DC (Max 31 units)
Shieldedwire

FG

Host computer
D-sub 9-pin connector

CDD or CPP (sold separately)
Bottom of IF-400, DCL-33A DC(Fig. 2-1)
1• D-sub 25-pin connector

IF-400(sold separately)

DCL-33A DC (Max 31 units)

Shieldedwire

Host computer
D-sub 25-pin connector(Fig. 2-2)

CDD or CPP (sold separately)

Shielded wire
Be sure to ground only one end of the shielded wire so that current cannot flow to the shielded wire.
If both ends of the shielded wire are grounded, the circuit will be closed between the shielded wire
and the ground. As a result, current will run through the shielded wire and this may cause noise.
Recommended cable: OTSC-VB 2PX0.5SQ (made by Onamba Co., Ltd.) or equivalent(Use a twisted pair cable.)
Terminator (Terminal resistor)
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 a terminator with the communication line because each DCL-33A DC has built-in
pull-up and pull-down resistors instead of a terminator.

3. Communication Parameters Setting
Press and hold the
key andkey (in that order) together for 3 seconds.
The unit enters Auxiliary function setting mode 1.
To set each setting item, use theorkey, and register the set value with theCharacter

key.

Name, Function, Setting Range
Factory Default
Auxiliary function setting mode 1 (Set value lock)
UnlockPress thekey twice. “Communication protocol” will appear.
Communication protocol
Shinko protocol• Selects communication protocol.
•: Shinko protocol,: Modbus ASCII mode,: Modbus RTU mode
Instrument number0• Sets the instrument number. (The instrument numbers should be set one by one when
multiple instruments are connected.)• Setting range: 0 to 95
Communication speed
9600 bps• Selects a communication speed equal to that of the host computer.
•: 2400 bps,
: 4800 bps,
: 9600 bps,
: 19200 bps
ParityEven• Selects the parity.
• Not available if Shinko protocol in selected in [Communication protocol].
•: No parity,: Even,: Odd
Stop bit
Stop bit 1• Selects the stop bit.
• Not available if Shinko protocol in selected in [Communication protocol].
• Selection: 1 or 22

4. Communication Procedure

Communication starts with command transmission from the host computer (hereafter Master) and ends
with the response of the DCL-33A DC (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 the processing
Acknowledgement
is terminated.
• Negative acknowledgement
Command
When the master sends a non-existent command or value
out 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:
Command• Global address (Shinko protocol) is set.
• Broadcast address (Modbus protocol) is set.
No response• Communication error (framing error, parity error)• Checksum error (Shinko protocol), LRC discrepancy (Modbus(Fig. 4-1)
ASCII mode), CRC-16 discrepancy (Modbus RTU mode)
Communication timing between master and slave
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 receptionof 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
to send 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 the transmitter 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 by a hexadecimal numbers.
The negative numbers are represented in 2's complement.
Numerals written below the command represent number of characters.
(1) Setting command
Sub
HeaderCommandData
address
Address
Data
Checksum
(02H)
type
(50H)
item
(20H)
1
1
1
1
4
4
2
(2) Reading command
Header(02H)
1

Address
1

Sub
address(20H)
1Commandtype (20H)
1
3

Data
item
4

Checksum
2

Delimiter(03H)
1

Delimiter(03H)1

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

Address
1(4) Acknowledgement
HeaderAddress
(06H)
1
1

Sub
address(20H)
1

Checksum2(5) Negative acknowledgement
HeaderError
Address
(15H)
code
1
1
1

Commandtype (20H)
1

Data
item
4

Data

Checksum

42

Delimiter(03H)
1

Delimiter(03H)
1

Checksum
2

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 Global address, which is used when the same command is sent
to all the slaves connected. However, the response is not returned.
Sub address: 20H fixedCommand type: Code to discern Setting command (50H) and Reading command (20H)
Data item:
Classification of the command object
Composed of 4-digit hexadecimal numbers, using ASCII.
(See the Communication command table.)
Data:
The contents of data (set value) differ depending on the setting command.
Composed of 4-digit hexadecimal numbers, using ASCII.
(See the Communication command table.)
Checksum: 2-character data to detect communication errors
Delimiter:Control code to represent the end of command
ASCII code ETX (03H) fixedError code: Represents an error type using ASCII.
1 (31H)-----Non-existent command
2 (32H)-----Not used
3 (33H)-----Setting 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 fromthe slaves so that communication errors can be checked.
The ASCII code (hexadecimal) corresponding to the characters which range from the address tothat before the checksum is converted to binary notation, and the total value is calculated.
The lower one byte of the total value is converted to 2’s complement, and then to hexadecimal
numbers, that is, ASCII code for the checksum.

4

Checksum calculation example
SV (desired value): 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

0

2

5

8

30H

32H

35H

38H

E

0

ETX

[Characters above are represented by 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

03H

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

1101 1111
11110 0000
E

0

45H

30H

Checksum(Fig.5.3-1)

5.4 Command Example
Numerals written below the command represent number of characters.
(1) Reading (Address 1, PV)• Reading command from the master
Header Address
Sub Command
Data item
Checksum Delimiter
address
type[0080H]
(02H)
(21H)
(20H)
(20H) (30H 30H 38H 30H) (44H 37H) (03H)
1

1

1

1

4

2

1

• A response from the slave in normal status (When PV=25[0019H])Header Address
Sub Command
Data item
Data
Checksum Delimiter
address
type[0080H][0019H](06H) (21H)(20H)(20H) (30H 30H 38H 30H) (30H 30H 31H 39H) (30H 44H) (03H)
1

1

1

1

4

4

2

1

(2) Reading (Address 1, SV)• Reading command from the master
Header Address
Sub Command
Data item
Checksum Delimiter
address
type[0001H]
(02H)
(21H)
(20H)
(20H) (30H 30H 30H 31H) (44H 45H) (03H)
1

1

1

1

4

2

1

• A response from the slave in normal status (When SV=600[0258H])Header Address
Sub Command
Data item
Data
Checksum Delimiter
address
type[0001H][0258H](06H) (21H)(20H)(20H) (30H 30H 30H 31H) (30H 32H 35H 38H) (30H 46H) (03H)
1

1

1

1

4

5

4

2

1

(3) Setting [Address 1, SV=600(0258H)]• Setting command from the master
Header Address
Sub Command
Data item
Data
Checksum Delimiter
address
type[0001H][0258H](02H) (21H)(20H)(50H) (30H 30H 30H 31H) (30H 32H 35H 38H) (44H 46H) (03H)
1

1

1

1

4

4

2

1

• A response from the slave in normal status
Header Address Checksum Delimiter
(06H)
1

(21H)
1

(44H 46H)
2

(03H)
1

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/No/Odd (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)].
HeaderSlave
FunctionError check
Delimiter Delimiter
Data(:)
address
code
LRC
(CR)
(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 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 the following action types (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
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 themaster.
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 to 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 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 6.2-2)(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 operation, etc)
6(4) Data
Data differs depending on the function code.
A request message from the master is composed of data item, amount of data and setting data.
A response message from the slave is composed of the number of bytes, data and exception
codes in negative acknowledgements.
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 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.
(6) Message example of ASCII 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 (30H 30H 30H 31H).
HeaderSlaveaddress

Function
code

(3AH)

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

1

2

2

Data item

Amount ofdata(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 the data which has been read.
It is fixed as (30H 32H).
Slave
address

Function
code

(3AH)

1

HeaderNumber of
response bytes(0258H)

Error check
LRC

Delimiter(30H 31H)(30H 33H)(02H)(30H 32H)

Data(30H 32H 35H 38H)

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

2

2

2

4

2

2

• 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 (error).
HeaderSlaveaddress

Functioncode

Exceptioncode (02H)

Error check
LRC

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

1

2

2

2

2

2

Data item

Data(0001H)(0258H)

Error check
LRC

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

4

2

2

Data item

Data(0001H)(0258H)

Error check
LRC

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

2

2

Setting [Salve address 1, SV=600• A request message from the master(0258H)]2

HeaderSlaveaddress

Function
code

(3AH)

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

1

2

2(30H 30H 30H 31H)(30H 32H 35H 38H)

4

• Response message from the slave in normal status
HeaderSlaveaddress

Function
code

(3AH)

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

1

2

2(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 (error).
HeaderSlaveaddress

Functioncode

Exceptioncode (03H)

Error check
LRC

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

1

2

2

2

2

2

7

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/No/Odd (Selectable)
Stop bit: 1 bit/2 bits (Selectable)
Error detection : CRC-16 (Cyclic Redundancy Check)
Data interval: 3.5 character transmission times or less
(1) Message configuration
RTU mode is configured to start after idle time is processed for more than 3.5 character transmissions
and end after idle time is processed for more than 3.5 character transmissions.
3.5 idle
characters

Slave
address

Function
code

Error check
CRC-16Data

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 address in the
response message.
Slave address 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 the following action types (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 themaster.
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 to 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 code (Table 6.3-2) below is set to the data of response
messages, and returned to the master in order to inform it of what kind of error has occurred.
(Table 6.3-2)
Exception code
1 (01H)
2 (02H)
3 (03H)
17 (11H)
18 (12H)

Contents
Illegal function (Non-existent function)
Illegal data address (Non-existent data address)
Illegal data value (Value out of the setting range)
Shinko error code 4 (Status unable to be set)
Shinko error code 5 (During setting mode by keypad operation, etc)

(4) Data
Data differs depending on the function code.
A request message from the master side is composed of data item, amount of data and setting data.
A response message from the slave side is composed of number of bytes, data and exception codesin negative acknowledgements. 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 data, thecalculated 16-bit data is appended to the end of message in sequence from low order to high order.

8

How to calculate CRC-16
In the CRC-16 system, the information is divided by a polynomial series. The remainder is added tothe end of the information and transmitted. The generation of polynomial series is as follows.
(Generation of polynomial series: X16 + X 15 + X 2 + 1)
1
2
3
4
5
6
7
8
9

Initialize the CRC-16 data (assumed as X) (FFFFH).
Calculate exclusive OR (XOR) with the 1st data and X. This is assumed as X.
Shift X one bit to the right. This is assumed as X.
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 .
Repeat steps 3 and 4 until shifting 8 times.
XOR is calculated with the next data and X. This is assumed as X.
Repeat steps 3 to 5 .
Repeat steps 3 to 5 up to the last data.
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 )

Functioncode(03H )

1

1(0001H)Am ount of
data(0001H)

Error check
CR C-16(D5C AH )22

2

Data item

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 the data which has been read. It is
fixed as 02H.
3.5 idle
characters

Slave
address(01H)

Function
code
(03H)

Num ber of
response bytes

Data

(02H)

(0258H)

Error check
CRC-16(B8DEH)

1

1

1

2

2

3.5 idle
characters• 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 (error).
3.5 idle
characters

Slave
address(01H)

Function
code
(83H)

Exception
code
(02H)

1

1

1

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

3.5 idle
characters

Slave
address(01H)

Function
code
(06H)

1

1

Error check
CRC-16(C0F1H)

3.5 idle
characters

2(0258H)]
Data item

Data(0001H)(0258H)

Error check
CRC-16(D890H)222

3.5 idle
characters• Response message from the slave in normal status
3.5 idle
characters

Slave
address(01H)

Function
code
(06H)

1

1

Data item

Data(0001H)(0258H)

Error check
CRC-16(D890H)222

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 (error).
3.5 idle
characters

Slave
address(01H)

Function
code
(86H)

Exception
code
(03H)

1

1

1

Error check
CRC-16(0261H)2

9

3.5 idle
characters

7. Communication Command Table
Data
Notes about setting, reading command• The data (set value, decimal) is converted to hexadecimal numbers.
A negative number is represented in 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 read, 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 (SV) as an example: Data item in the sending message is 0001H, however,
Modbus protocol Holding Register address is 40002 (1 + 40001).
Setting command• 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.
• Settings via software communication are possible while in Set value lock status.
• When Lock 3 is selected in [Set value lock], set values are not saved in the non-volatile IC memory.
Therefore, they revert to their previous value after the power is turned off.
• If the alarm type is changed at Data item 0023H (Alarm type), Data item 000BH (Alarm value) will
default to 0 (zero). Also alarm output status will be initialized.
• Even if options are not ordered, setting items for options is possible using the setting command, however,they will not function.
• The Communication Protocol, Instrument Numbers, Communication Speed, Parity and Stop Bit of theslave cannot be set by the software communication function. They can only be set via the keypad.
• When sending a command by Global address [95 (7FH), Shinko protocol] or Broadcast address [0(00H), Modbus protocol], the same command is sent to all the slaves connected. However, theresponse is not returned.
• Up to 1,000,000 (one million) entries can be stored in non-volatile IC memory.
If the number of settings exceeds the limit, the data will not be saved. So, do not change the set values
frequently via software communication. (If a value set via software communication is the same as thevalue before the setting, the value will not be written in non-volatile IC memory.)
Reading Command• When the data (set value) has a decimal point, a whole number (hexadecimal) without a decimal point
is used for a response.
Negative acknowledgement
The slave will return Error code 1 (31H, Shinko protocol) or Exception code 1 (01H, Modbus
protocol) in the following case.
• When AT Perform/Cancel (0003H) is selected during PI control or ON/OFF control action.
The slave will return Error code 4 (34H, Shinko protocol) or Exception code 17 (11H, Modbus
protocol) in the following cases.
• If 0000H (Cancel) is selected at 0003H (AT Perform/Cancel) while Auto-tuning is being cancelled.
• If 0001H (Perform) is selected at 0003H (AT Perform/Cancel) while Auto-tuning is performing.

10

Shinkocommandtype
20H/50H
20H/50H
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
03H/06H
03H/06H

0001H: SV
0003H: AT Perform/Cancel
0004H: OUT1 proportional band
0005H: OUT2 proportional band
0006H: Integral time
0007H: Derivative time
0008H: OUT1 proportional cycle
0009H: OUT2 proportional cycle
000AH: Manual reset
000BH: Alarm value
000FH: Heater burnout alarm value
0010H: Loop break alarm time0011H: Loop break alarm span
0012H: Set value lock20H/50H
20H/50H
20H/50H
20H/50H
20H/50H

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

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

Modbusfunction
code

Data item

Data
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
0000H: XXXX (No decimal point)
0001H: XXX.X (1 digit after decimal point)
0002H: XX.XX (2 digits after decimal
point)
0003H: X.XXX (3 digits after decimal
point)

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 modeSet value
Set value
Set value
Set value
0000H: Air cooling (linear characteristic)
0001H: Oil cooling (1.5th power of thelinear characteristic)

0002H: Water cooling (2nd power of thelinear characteristic)

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

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

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

03H/06H 0025H: Alarm hysteresis
03H/06H 0029H: Alarm action delay time
03H/06H 0040H: Alarm action Energized/
De-energized
03H/06H 0042H: Alarm HOLD function

20H/50H

0020H: OUT2 high limit
0021H: OUT2 low limit
0022H: OUT2 ON/OFF hysteresis
0023H: Alarm type11

Set 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: High/Low limits alarm with standby
Set value
Set value
0000H: Energized
0001H: De-energized
0000H: Alarm Not Holding
0001H: Alarm Holding

ShinkoModbusData item
command function
type
code
20H/50H 03H/06H 0044H: Input type

Data

20H/50H

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

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

03H/06H 0047H: AT bias
03H/06H 0048H: ARW
03H/06H 006FH: Key Lock

50H

06H

20H
20H
20H

03H
03H
03H

0070H: Key operation change flagclearing
0080H: PV
0081H: OUT1 MV
0082H: OUT2 MV

120000H: 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) control
0001H: Cooling (Direct)control
Set value
Set value
0000H: Key enabled
0001H: Key Lock
0000H: No action
0001H: Clear all
Current PV
Current OUT1 MV
Current OUT2 MV

Shinkocommandtype
20H

Modbusfunctioncode
03H

Data item

Data

0085H: Status flag

0000 0000 0000 0000
2
to20
20 digit: OUT1
0: OFF 1: ON
1
2 digit: OUT2
0: OFF 1: ON
22 digit: Alarm output 0: OFF 1: ON
23 to 25 digit: Not used (Always 0)
26 digit: Heater burnout alarm output
0: OFF 1: ON(Sensor burnout, 0: OFF)7
2 digit: Loop break alarm output
0: OFF 1: ON
8
2 digit: Overscale
0: OFF 1: ON
29 digit: Underscale 0: OFF 1: ON
210 digit: Not used (Always 0)
211 digit: AT
0: OFF 1: During AT
212 digit: Not used (Always 0)
213 digit: Converter function
0: Controller 1: Converter
14
2 digit: Not used (Always 0)
215 digit: Change in key operation
0: No 1: Yes
Heater current (ampere) value(HOLD value when OUT1 output is ON)
15

20H

03H

0086H: Heater current (ampere) value

Notes about programming monitoring software
How to speed up the scan time
When monitoring plural units of DCL-33A DC, set the program so that requisite minimum pieces of datasuch as Data item 0080H (PV), Data item 0081H (OUT1 MV), Data item 0082H (OUT2 MV), Data item
0085H (Status flag), etc. can be read. For other data, set the program so that they can be read only
when their set value has been changed. This will speed up the scan time.
How to read the set value changes made by front keypad operation
If any set value is changed by keypad operation, the instrument sets [0085H (Status flag) 2 15: Change
in key operation] to 1 (Yes).
There are 2 methods of reading the set value changes made by the front keypad.
Reading method 1(1) On the software side, check that [0085H (Status flag) 215: Change in key operation] has been set
to 1 (Yes), then read all set values.
(2) Clear [0085H (Status flag) 215: Change in key operation], by setting Data item 0070H (Key
operation change flag clearing) to 0001H (Clear all).
If 0070H (Key operation change flag clearing) is set to 0001H (Clear all) during the setting mode of
the instrument, Error code 5 (35H, Shinko protocol) or Exception Code 18 (12H, Modbus protocol) will
be returned as a negative acknowledgement. And [0085H (Status flag) 215: Change in key operation]cannot be cleared.
Set a program so that all set values can be read when a negative acknowledgement is returned.
(3) Read all set values again after acknowledgement is returned.

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Reading method 2(1) On the software side, check that [0085H (Status flag) 215: Change in key operation] has been set
to 1 (Yes), then set 0070H (Key operation change flag clearing) to 0001H (Clear all).
(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 0080H(PV), 0081H (OUT1 MV), 0082H (OUT2 MV), 0085H (Status flag), 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 auto-tuning finishes
The DCL-33A DC sets [0085H (Status flag) 211: AT] to 1 (During AT) while auto-tuning is performing.
After auto-tuning is finished, PID parameters are updated.
On the software side, read the parameters such as P, I, D, ARW after checking that [0085H (Status flag)
211: AT] has been set to 0 (OFF).
Note when sending all set values simultaneously• When changing alarm type at 0023H (Alarm type), alarm value will default to 0 (zero).
First, send the selected alarm type, then send the alarm value.
• When changing input type at 0044H (Input type), set values such as SV, OUT1 proportional band, Alarm
value, etc. will be initialized.
First, send the selected input type, then send other set values.

When communicating with a PLC
To communicate with a PLC, use a Shinko PLC interface unit SIF-600.
No programming is needed for connection.
PLCs Corresponding to SIF-600
PLC manufacturer
PLC model
Mitsubishi Electric Corp.

Host link unit

Omron Corp.

MELSECQ series, QnA series (*)
MELSEC FX series (*)
SYSMAC CJ series

Keyence Corp.
Yokogawa Electric Corp.
Fuji Electric Co., Ltd.

KV
FA-M3
MICREX-SX series

AJ71UC24, A1SJ71UC24-R2/R4/PRF
A1SJ71C24-R2/R4/PRF, QJ71C24
CS1W-SCU21-V1
CJ1W-SCU21, CJ1W-SCU41
KV-L20V
F3LC11-2N, F3LC11-1F, F3LC12-1F
NP1L-RS1, NP1L-RS2, NP1L-RS3, NP1L-RS4(*) Models with compatible QR/QW communication commands

148. Set Value Digital Transmission
Set values can be received from Shinko programmable controllers PC-900, PCD-33A for which Set value
digital transmission (SVTC option) is ordered.
8.1 Wiring
When connecting the PCD-33A to DCL-33A DC, connect YA (-) to YA (-), YB (+) to YB (+), and SG to
COM respectively for the Set value digital transmission.
A maximum of 31 units of the DCL-33A DC can be connected.
The following shows an example of connection between the PCD-33A and DCL-33A DC.
PCD-33A
DCL-33A DC (Max 31 units)
11 YA(-)
14 YB(+)
17 SG

CDM (Sold separately)

CDD or CPP (Sold separately)(Fig. 8.1-1)
8.2 Communication Parameters Setting(1) Setting the PCD-33A
If the SVTC option is ordered, it is not necessary to set any item.
Check if Set value digital transmission [] is selected in [Communication protocol (in Auxiliary function setting mode 1.
(2) Setting the DCL-33A DC
Check the following settings.
• Communication protocol is Shinko protocol.
• Communication speed of the DCL-33A DC is identical with that of the PCD-33A.
(3) Set value digital transmission starts.
Enter the Program values (step SV, step time, etc) on the PCD-33A.
If the Program is initiated by pressing the RUN key, PCD-33A Set values will be transmitted to
the DCL-33A DC.
During Program standby mode, 0 (zero) is sent to the DCL-33A DC.
15)]

9. Specifications
Cable length: Max. communication distance 1.2 km
Cable resistance: Within 50(Terminators are not necessary, but if used, use 120ormore on one side.)
Communication line:
EIA RS-485
Communication method: Half-duplex communication
Communication speed: 2400/4800/9600/19200 bps (Selectable by keypad) (Default: 9600 bps)
Synchronization method: Start-stop synchronization
Code form:
ASCII, binaryCommunication protocol: Shinko protocol/Modbus ASCII/Modbus RTU (Selectable by keypad)(Default: Shinko protocol)
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 2Error correction: Command request repeat system
Error detection: Parity, checksum (Shinko protocol), LRC (Modbus ASCII), CRC-16 (Modbus RTU)

10. Troubleshooting
Check that power is being supplied to the master and slave that customers use. If communication failure
still occurs, check the following.
• Problem: Communication failure
Check if any of the following have occurred:
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 Reading and Setting commands are 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 DCL-33A DC 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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