Shinko ACS-13A Use and care manual

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COMMUNICATION INSTRUCTION MANUAL ACS-13A (C5)
No. ACS12CE4 2008.08
This manual contains instructions for communication functions of the ACS-13A.
Serial communication and Console communication cannot be used together.
When performing Serial communication, remove the exclusive cable (CMA) from the USB port of the PC and
loader connector of the ACS-13A.
When performing Console communication, it is not required to remove the Serial communication cables.
However, do not send a command from the master side.
1. System configuration
(Fig. 1-1)
2. Wiring
When using communication converter IF-400
[D-sub 25-pin connector] [D-sub 9-pin connector]
Shielded wire
Connect only one side of the shielded wire to the FG terminal so that current cannot flow to the shielded wire.
If both sides of the shielded wire are connected to the FG terminal, 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.
Be sure to ground 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 terminator with the communication line because each ACS-13A has built-in pull-up
and pull-down resistors instead of a terminator.
To ACS-13A
D-sub 25-pin connector
Host computer
Shielded wire
Communication converter IF-400
RS-232C RS-485
Host computer
ACS-13A
No. 0
ACS-13A
No. 1
ACS-13A
No. 30
D-sub 9-pin connector
ACS-13A (Max. 31 units)
FG
FG
FG
(Fig. 2-1)
Host computer
Shielded
wire
Shielded
wire
Shielded wire

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3. Communication parameter setting
Set each communication parameter following the procedures below.
(1)
+
(Approx.3sec)
Proceed to Auxiliary function setting mode.
Press key for approx. 3sec while pressing the key in the PV/SV
display mode.
The unit proceeds to Auxiliary function setting mode.
(2)
(Twice)
Auxiliary function setting mode
Press the key twice.
The unit proceeds to Communication protocol selection.
(3) Communication protocol selection
Select the communication protocol.
: Shinko protocol (Default)
: Modbus ASCII mode
: Modbus RTU mode
(4) Instrument number setting
Set the instrument number of the controller individually when communicating
by connecting plural instruments.
0 to 95 (Default: 0)
(5) Communication speed selection
Set the communication speed equal to that of the host computer.
: 2400bps
: 4800bps
: 9600bps (Default)
: 19200bps
(6) Data bit/Parity selection
Select the data bit and parity.
: 8 bits/No parity
: 7 bits/ No parity
: 8 bits/Even
: 7 bits/Even (Default)
: 8 bits/Odd
: 7 bits/Odd
(7) Stop bit selection
Select the stop bit.
: 1 (Default)
: 2
4. Communication procedure
Communication starts with command transmission from the host computer (hereafter Master) and
ends with the response of the ACS-13A (hereafter Slave).
• Response with data
When the master sends the reading command, the slave
responds with the corresponding set value or current status.
• Acknowledgement
When the master sends the setting command, the slave
responds by sending the acknowledgement after the
processing is terminated.
• Negative acknowledgement
When the master sends a non-existent command or value
out of the setting range, the slave returns a negative
acknowledgement.
• No response
The slave will not respond to the master in the following cases:
• Global address (Shinko protocol) is set.
• Broadcast address (Modbus protocol) is set.
• Communication error (framing error, parity error)
• Checksum error(Shinko protocol), LRC discrepancy(Modbus ASCII
(Fig.4-1) mode), CRC-16 discrepancy(Modbus RTU mode)
Command
Data
Command
Acknowledgement
Command
Negative
acknowledgement
Command
No response
Master Slave

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Communication timing of the RS-485
Master side (Notice on 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 received the response.
Slave side
When the slave starts transmission through a 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 with hexadecimal number.
The negative numbers are represented with 2's complement.
Numerals written below the command represent number of characters.
(1) Setting command
Header
(02H) Address
Sub
address
(20H)
Command
type (50H)
Data
item Data Checksum Delimiter (03H)
1 1 1 1 4 4 2 1
(2) Reading command
Header
(02H) Address
Sub
address
(20H)
Command
type (20H)
Data
item Checksum Delimiter (03H)
1 1 1 1 4 2 1
(3) Response with data
Header
(06H) Address
Sub
address
(20H)
Command
type (20H)
Data
item Data Checksum Delimiter (03H)
1 1 1 1 4 4 2 1
(4) Acknowledgement
Header
(06H) Address Checksum Delimiter (03H)
1 1 2 1
(5) Negative acknowledgement
Header
(15H) Address Error code Checksum Delimiter (03H)
1 1 1 2 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

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Instrument number (Address): 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 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 codes.
(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 codes.
(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)-----Setting outside the setting range
4 (34H)-----Status which cannot 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 the slaves
so that the 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-digit of the total value are converted to 2’s complements, and then to hexadecimal figures,
that is, ASCII code for the checksum.
Checksum calculation example
SV: 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 complements.
STX ETX
P00010258
02H 20H 20H 50H 30H 30H 30H 31H 30H 32H 35H 38H 03H
[Characters above are represented by ASCII]
Checksum
Checksum calculation range
[e.g.]
E
45H 30H
0
20H
20H
50H
30H
30H
30H
31H
30H
32H
35H
38H
0010 0000
0010 0000
0101 0000
0011 0000
0011 0000
0011 0000
0011 0001
0011 0000
0011 0010
0011 0101
0011 1000
+
10 0010 0000
[Hexadecimal] [Binary]
1101 1111
1
+
1110 0000
E 0
45H 30H
[1's complement]
[2's complement]
[Hexadecimal]
[ASCII]
Checksum

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5.4 Command example
Numerals written below the command represent number of characters.
(1) Reading (Address 1, PV)
• Reading command from the master
Header
(02H)
Address
(21H)
Sub
address
(20H)
Command
type
(20H)
Data item
[0080H]
(30H 30H 38H 30H)
Checksum
(44H 37H)
Delimiter
(03H)
1 1 1 1 4 2 1
• A response from the slave in normal status [When PV=25 (0019H)]
Header
(06H)
Address
(21H)
Sub
address
(20H)
Command
type
(20H)
Data item
[0080H]
(30H 30H 38H 30H)
Data
[0019H]
(30H 30H 31H 39H)
Checksum
(30H 44H)
Delimiter
(03H)
1 1 1 1 4 4 2 1
(2) Reading (Address 1, SV)
• Reading command from the master
Header
(02H)
Address
(21H)
Sub
address
(20H)
Command
type
(20H)
Data item
[0001H]
(30H 30H 30H 31H)
Checksum
(44H 45H)
Delimiter
(03H)
1 1 1 1 4 2 1
• A response from the slave in normal status [When SV=600 (0258H)]
Header
(06H)
Address
(21H)
Sub
address
(20H)
Command
type
(20H)
Data item
[0001H]
(30H 30H 38H 30H)
Data
[0258H]
(30H 32H 35H 38H)
Checksum
(30H 46H)
Delimiter
(03H)
1 1 1 1 4 4 2 1
(3) Setting (Address 1, SV) [when setting SV to 600 (0258H)]
• Setting command from the master
Header
(02H)
Address
(21H)
Sub
address
(20H)
Command
type
(50H)
Data item
[0001H]
(30H 30H 30H 31H)
Data
[0258H]
(30H 32H 35H 38H)
Checksum
(44H 46H)
Delimiter
(03H)
1 1 1 1 4 4 2 1
• A response from the slave in normal status
Header
(06H)
Address
(21H)
Checksum
(44H 46H)
Delimiter
(03H)
1 1 2 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 (8 bits) Selectable
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 (Max.1sec of interval between characters)
(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
(:)
Slave
address
Function
Code Data Error check LRC
Delimiter
(CR)
Delimiter
(LF)
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 connected. However slaves do not
respond.

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Function code
The function code is the command code for the slave to undertake the following action types.
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) is 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 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 the response message and
returned to the master in order to inform it of what kind of error has occurred.
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 protocol error code 4 (Status which cannot be set, e.g. AT is performing)
18 (12H) Shinko protocol error code 5 (During setting mode by keypad operation)
Data
Data differs depending on the function code.
A request message from the master is composed of data item, number of data and setting data.
A response message from the slave is composed of a number of bytes, data and exception codes in negative
acknowledgements. The number of data to be dealt with in one message is “1”.
Therefore the number of data is fixed as (30H)(30H)(30H)(31H).
Effective range of data is -32768 to 32767 (8000H to 7FFFH).
Error check: 2-character data to detect communication errors.
Refer to “(2) Error check of ASCII mode”.
(2) Error check of ASCII mode
After calculating LRC (Longitudinal Redundancy Check) from the slave address to the end of data,
the calculated 8-bit data is converted to two ASCII characters and are appended to the end of message.
How to calculate LRC
1Create a message in RTU mode.
2Add all the values from the slave address to the end of data. This is assumed as X.
3Make a complement for X (bit reverse). This is assumed as X.
4Add a value of 1 to X. This is assumed as X.
5Set X as an LRC to the end of the message.
6Convert the whole message to ASCII characters.
(3) Message example of ASCII mode
Numerals written below the command represent number of characters.
1Reading (Slave address 1, PV)
• A request message from the master
The number of data means the data item to be read, and it is fixed as 1 (30H 30H 30H 31H).
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(30H 33H)
Data item
[0080H]
(30H 30H 38H 30H)
Number of data
[0001H]
(30H 30H 30H 31H)
Error check
LRC
(37H 42H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 4 4 2 2
• Response message from the slave in normal status [When PV=600 (0258H)]
The number of response byte means the number of byte of the data which has been read,
and it is fixed as 2 (30H 32H).
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(30H 33H)
Number of
response byte
[02H]
(30H 32H)
Data
[0258H]
(30H 32H 35H 38H)
Error check
LRC
(41H 30H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 2 4 2 2
2Reading (Slave address 1, SV)
• A request message from the master
The number of data means the data item to be read, and it is fixed as 1 (30H 30H 30H 31H).
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(30H 33H)
Data item
[0001H]
(30H 30H 30H 31H)
Number of data
[0001H]
(30H 30H 30H 31H)
Error check
LRC
(46H 41H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 4 4 2 2

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• Response message from the slave in normal status [When SV=600 (0258H)]
The number of response byte means the number of byte of the data which has been read,
and it is fixed as 2 (30H 32H).
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(30H 33H)
Number of
response byte
[02H]
(30H 32H)
Data
[0258H]
(30H 32H 35H 38H)
Error check
LRC
(41H 30H)
Delimiter
CR+LF
(0DH 0AH)
1 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 (38H 33H)].
The exception code 02H (30H 32H: Non-existent data address) is returned (error).
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(38H 33H)
Exception code
[02H]
(30H 32H)
Error check
LRC
(37H 41H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 2 2 2
3Setting (Slave address 1, SV) [When setting SV to 600 (0258H)]
• A request message from the master
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(30H 36H)
Data item
[0001H]
(30H 30H 30H 31H)
Data
[0258H]
(30H 32H 35H 38H)
Error check
LRC
(39H 45H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 4 4 2 2
• Response message from the slave in normal status
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(30H 36H)
Data item
[0001H]
(30H 30H 30H 31H)
Data
[0258H]
(30H 32H 35H 38H)
Error check
LRC
(39H 45H)
Delimiter
CR+LF
(0DH 0AH)
1 2 2 4 4 2 2
• 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 (38H 36H)].
The exception code 03H (30H 33H: Value out of the setting range) is returned (error).
Header
(3AH)
Slave
address
(30H 31H)
Function
code
(38H 36H)
Exception code
[03H]
(30H 33H)
Error check
LRC
(37H 36H)
Delimiter
CR+LF
(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 : No parity (Even, 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
To transmit continuously, an interval between characters which consist of one message, must
be within 3.5 character transmission times.
(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 Data Error check CRC-16
3.5 idle
characters
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 connected. However slaves do not respond.
Function code
The function code is the command code for the slave to undertake the following action types.
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 for the response.

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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 the response messages
and returned to the master in order to inform it of what kind of error has occurred.
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 protocol error code 4 (Status which cannot be set, e.g. AT is performing)
18 (12H) Shinko protocol error code 5 (During setting mode by keypad operation)
Data
Data differs depending on the function code.
A request message from the master side is composed of data item, number of data and setting data.
A response message from the slave side is composed of a number of byte, data and exception codes
in negative acknowledgements.
The number of data to be dealt with in one message is “1”. Therefore the number of data is fixed as (0001H).
The number of response byte is (02H).
Effective range of data is –32768 to 32767 (8000H to 7FFFH).
Error check: 16 bit data to detect communication errors. Refer to “(2) Error check of RTU mode” below.
(2) Error check of RTU mode
After calculating CRC-16 (Cyclic Redundancy Check) from the slave address to the end of data, the
calculated 16-bit data is appended to the end of message in sequence from low order to high order.
How to calculate CRC
In the CRC system, the information is divided by the polynomial series. The remainder is added to the
end of the information and transmitted. The generation of polynomial series is as follows.
(Generation of polynomial series: X16 + X 15 + X 2+ 1)
1Initialize the CRC-16 data (assumed as X) (FFFFH).
2Calculate exclusive OR (XOR) with the 1st data and X. This is assumed as X.
3Shift X one bit to the right. This is assumed as X.
4When a carry is generated as a result of the shift, XOR is calculated by X of 3and the fixed
value (A001H). This is assumed as X. If a carry is not generated, go to step 5.
5Repeat steps 3and 4until shifting 8 times.
6XOR is calculated with the next data and X. This is assumed as X.
7Repeat steps 3to 5.
8Repeat steps 3to 5up to the last data.
9Set X as CRC-16 to the end of message in sequence from low order to high order.
(3) Message example of RTU mode
Numerals written below the command represent number of characters.
1Reading (Slave address 1, PV)
• A request message from the master
The number of data means the data item to be read, and it is fixed as 1 (0001H).
3.5 idle
characters
Slave
address
(01H)
Function
code
(03H)
Data item
(0080H)
Number of data
(0001H)
Error check
CRC-16
(85E2H)
3.5 idle
characters
1 1 2 2 2
• Response message from the slave in normal status [When PV=600 (0258H)]
The number of response byte means the number of byte of the data which has been read,
and it is fixed as 2 (02H).
3.5 idle
characters
Slave
address
(01H)
Function
code
(03H)
Number of
response byte
(02H)
Data
(0258H)
Error check
CRC-16
(B8DEH)
3.5 idle
characters
1 1 1 2 2
2Reading (Slave address 1, SV)
• A request message from the master
The number of data means the data item to be read, and it is fixed as 1 (0001H).
3.5 idle
characters
Slave
address
(01H)
Function
code
(03H)
Data item
(0001H)
Number of data
(0001H)
Error check
CRC-16
(D5CAH)
3.5 idle
characters
1 1 2 2 2
• Response message from the slave in normal status [When SV=600 (0258H)]
The number of response byte means the number of byte of the data which has been read, and it is fixed as 2 (02H).
3.5 idle
characters
Slave
address
(01H)
Function
code
(03H)
Number of
response byte
(02H)
Data
(0258H)
Error check
CRC-16
(B8DEH)
3.5 idle
characters
1 1 1 2 2

9
• Response message from the slave in exception (error) status (When 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 (error).
3.5 idle
characters
Slave
address
(01H)
Function
code
(83H)
Exception code
(02H)
Error check
CRC-16
(C0F1H)
3.5 idle
characters
1 1 1 2
3Setting (Slave address 1, SV) [When setting SV to 600 (0258H)]
• A request message from the master
3.5 idle
characters
Slave
address
(01H)
Function
code
(06H)
Data item
(0001H)
Data
(0258H)
Error check
CRC-16
(D890H)
3.5 idle
characters
1 1 2 2 2
• Response message from the slave in normal status
3.5 idle
characters
Slave
address
(01H)
Function
code
(06H)
Data item
(0001H)
Data
(0258H)
Error check
CRC-16
(D890H)
3.5 idle
characters
1 1 2 2 2
• 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)
Error check
CRC-16
(0261H)
3.5 idle
characters
1 1 1 2
7. Communication command table
Data
Note on setting, reading command
• The data (set value, decimal) is converted to hexadecimal figures. A negative number is represented by 2's
complement.
• When connecting plural slaves, the address (instrument number) must not be duplicated.
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.
• If the alarm type is changed during Alarm 1 type selection (0023H) and Alarm 2 type selection (0024H), the
alarm value will revert to “0”. Also alarm output status will be initialized.
• It is possible to set the set value with the setting command of the communication function even when the set
value is locked.
• Although the options are not applied, setting the items for the 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 communication function.
• When sending a command by Global address [95 (7FH)], the same command is sent to all the slaves
connected. However, the response is not returned.
• The memory can store up to 1,000,000 (one million) entries.
If the number of settings exceeds the limit, the data will not be saved. So frequent transmission via
communication is not recommended.
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 cases.
• If control output OUT/OFF function (0037H) is selected after selecting Auto/Manual control function during
OUT/OFF key function selection.
• If Auto/Manual control (0038H) is selected after selecting control output OUT/OFF function during OUT/OFF
key function selection.
• When Manual control MV (0039H) is set during automatic control.
• When Auto-tuning/Auto-reset (0003H) is selected during PI action or ON/OFF action.
The slave will return Error code 4 (34H) (Shinko protocol) or Exception code 17 (11H) (Modbus
protocol) in the following cases.
• If “Cancel (0000H)” of Auto-tuning/Auto-reset (0003H) is selected while Auto-tuning/Auto-reset is being
cancelled.
• When “Perform (0001H)” of Auto-tuning/Auto-reset (0003H) is selected while Auto-tuning/Auto-reset is
performing

10
Shinko
Command
type
Modbus
Function
code Data item Data
20H/50H 03H/06H 0001H SV Set value, Decimal point ignored
20H/50H 03H/06H 0003H Auto-tuning/Auto-reset 0000H: Cancel
0001H: Perform
20H/50H 03H/06H 0004H OUT1 proportional band Set value, Decimal point ignored
20H/50H 03H/06H 0005H OUT2 proportional band Set value, Decimal point ignored
20H/50H 03H/06H 0006H Integral time Set value
20H/50H 03H/06H 0007H Derivative time Set value
20H/50H 03H/06H 0008H OUT1 proportional cycle Set value
20H/50H 03H/06H 0009H OUT2 proportional cycle Set value
20H/50H 03H/06H 000BH Alarm 1 value Set value, Decimal point ignored
20H/50H 03H/06H 000CH Alarm 2 value Set value, Decimal point ignored
20H/50H 03H/06H 000FH Heater burnout alarm value Set value, Decimal point ignored
20H/50H 03H/06H 0012H Set value lock 0000H: Unlock
0001H: Lock 1
0002H: Lock 2
0003H: Lock 3
20H/50H 03H/06H 0015H Sensor correction Set value, Decimal point ignored
20H/50H 03H/06H 0016H Overlap/Dead band Set value
20H/50H 03H/06H 0018H Scaling high limit Set value, Decimal point ignored
20H/50H 03H/06H 0019H Scaling low limit Set value, Decimal point ignored
20H/50H 03H/06H 001AH Decimal point place 0000H: xxxx
0001H: xxx.x
0002H: xx.xx
0003H: x.xxx
20H/50H 03H/06H 001BH PV filter time constant Set value, Decimal point ignored
20H/50H 03H/06H 001CH OUT1 high limit Set value
20H/50H 03H/06H 001DH OUT1 low limit Set value
20H/50H 03H/06H 001EH OUT1 ON/OFF action hysteresis Set value, Decimal point ignored
20H/50H 03H/06H 001FH OUT2 action mode 0000H: Air cooling
0001H: Oil cooling
0002H: Water cooling
20H/50H 03H/06H 0020H OUT2 high limit Set value
20H/50H 03H/06H 0021H OUT2 low limit Set value
20H/50H 03H/06H 0022H OUT2 ON/OFF action hysteresis Set value, Decimal point ignored
20H/50H 03H/06H 0023H Alarm 1 type 0000H: No alarm action
0001H: High limit alarm
0002H: Low limit alarm
0003H: High/Low limits alarm
0004H: H/L 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 with standby
20H/50H 03H/06H 0024H Alarm 2 type The same as the Alarm 1 type
20H/50H 03H/06H 0025H Alarm 1 hysteresis Set value, Decimal point ignored
20H/50H 03H/06H 0026H Alarm 2 hysteresis Set value, Decimal point ignored
20H/50H 03H/06H 0029H Alarm 1 action delayed timer Set value
20H/50H 03H/06H 002AH Alarm 2 action delayed timer Set value
20H/50H 03H/06H 0032H
Indication selection when output
OFF
0000H: OFF indication
0001H: No indication
0002H: PV indication
0003H: PV+ Alarm action

11
Shinko
Command
type
Modbus
Function
code
Data item Data
20H/50H 03H/06H 0033H SV rise rate Set value, Decimal point ignored
20H/50H 03H/06H 0034H SV fall rate Set value, Decimal point ignored
20H/50H 03H/06H 0037H Control output OUT/OFF 0000H: Control output ON
0001H: Control output OFF
20H/50H 03H/06H 0038H Auto/Manual control 0000H: Automatic control
0001H: Manual control
20H/50H 03H/06H 0039H Manual control MV Set value
20H/50H 03H/06H 0040H Alarm 1 Energized/De-energized 0000H: Energized
0001H: De-energized
20H/50H 03H/06H 0041H Alarm 2 Energized/De-energized 0000H: Energized
0001H: De-energized
0000H: K -200 to 1370
0001H: K -200.0 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 -200.0 to 400.0
0008H: N -200 to 1300
0009H: PL- 0 to 1390
000AH: C(W/Re5-26) 0 to 2315
000BH: Pt100 -200.0 to 850.0
000CH: JPt100 -200.0 to 500.0
000DH: Pt100 -200 to 850
000EH: JPt100 -200 to 500
000FH: K -320 to 2500
0010H: K -320.0 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 -320.0 to 750.0
0017H: N -320 to 2300
0018H: PL- 0 to 2500
0019H: C(W/Re5-26) 0 to 4200
001AH: Pt100 -320.0 to 1500.0
001BH: JPt100 -320.0 to 900.0
001CH: Pt100 -320 to 1500
001DH: JPt100 -320 to 900
20H/50H 03H/06H 0044H Input type
001EH: 4 to 20mA -2000 to 10000
001FH: 0 to 20mA -2000 to 10000
0020H: 0 to 1V -2000 to 10000
0021H: 0 to 5V -2000 to 10000
0022H: 1 to 5V -2000 to 10000
0023H: 0 to 10V -2000 to 10000
20H/50H 03H/06H 0045H Direct/Reverse action 0000H: Reverse action
0001H: Direct action
20H/50H 03H/06H 0047H AT bias Set value
20H/50H 03H/06H 0048H ARW Set value
20H/50H 03H/06H 0049H Heater burnout alarm 2 value Set value, Decimal point ignored.

12
Shinko
Command
type
Modbus
Function
code
Data item Data
20H/50H 03H/06H 004AH OUT1 rate of change limit Set value
20H/50H 03H/06H 0050H Backlight 0000H: All are backlit
0001H: Only PV display is backlit
0002H: Only SV display is backlit
0003H: Only Action indicators are backlit
0004H: PV+SV displays are backlit
0005H: PV+ Action indicators are backlit
0006H: SV+ Action indicators are backlit
20H/50H 03H/06H 0051H PV color 0000H: Green
0001H: Red
0002H: Orange
0003H: Alarm ON: Green Red
0004H: Alarm ON: Orange Red
0005H: PV continuous change
0006H: PV continuous change
+ Alarm ON; Red
20H/50H 03H/06H 0052H PV color range Set value, Decimal point ignored.
20H/50H 03H/06H 0053H Backlight time Set value
50H 06H 0070H Key operation change flag
clearing
0000H: No action
0001H: All clearing
20H 03H 0080H PV (process variable) Decimal point ignored
20H 03H 0081H OUT1 MV Decimal point ignored
20H 03H 0082H OUT2 MV Decimal point ignored
20H 03H 0083H SV (When SV rises or falls) Decimal point ignored
20H 03H 0085H Status flag
0000 0000 0000 0000
20: OUT1 0: OFF, 1: ON
(DC current output: Not fixed)
21: OUT2 0: OFF, 1: ON
22: Alarm 1 output 0: OFF, 1: ON
23: Alarm 2 output 0: OFF, 1: ON
24: Not used, Always 0
25: Not used, Always 0
26: Heater burnout alarm 0: OFF, 1: ON
(When Sensor burnout 0: OFF)
27: Not used, Always 0
28: Overscale 0: OFF, 1: ON
29: Underscale 0: OFF, 1: ON
210: Control output OUT/OFF selection
0: ON, 1: OFF
211: Auto-tuning/Auto-reset
0: OFF, 1: During Auto-tuning/Auto-reset
212: OUT/OFF key function selection
0: OUT/OFF function, 1:Auto/Manual control
213: Not used, always 0
214: Auto/Manual control
0: Automatic control, 1: Manual control
215: Change in key operation
0: No, 1: Yes
20H 03H 0086H CT1 current value Decimal point ignored
20H 03H 0087H CT2 current value Decimal point ignored

13
Notes on programming monitoring software
How to speed up the scan time
When monitoring plural units of ACS-13A, set the program so that requisite minimum pieces of data such 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 the keypad operation, the ACS-13A sets the [Status flag (0085H) 215: 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 [All clearing (0001H)].
If [Key operation change flag clearing (0070H)] is set to [All clearing (0001H)] during the setting mode of the
ACS-13A, 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.
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 [All clearing (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 during 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 auto-tuning finishes
The ACS-13A sets [Status flag (0085H) 211: Auto-tuning/Auto-reset] to [During Auto-tuning/Auto-reset (1)] 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 [Status flag (0085H) 211:
Auto-tuning/Auto-reset] has been set to [OFF (0)].
Note when sending all set values at one time
• When alarm type is changed during Alarm 1 type selection (0023H) or Alarm 2 type selection (0024H), alarm
value will revert to “0”. First, send the selected alarm type, then send the alarm value.
• When input type is changed during Input type selection (0044H), set values such as SV, OUT1 proportional band,
Alarm 1 value, etc. will be initialized. First, send the selected input type, then send other set values.

14
When communicating with a PLC
Command example (Shinko protocol) when communicating with a Mitsubishi PLC (FX series)
• Reading (Top D register: D100)
Address 1, PV reading
Sending Data (STX)(!)( )( )(0)(0)(8)(0)(D)(7)(ETX)
Command Register Code
Header (STX) 02H D100(LSB) 02H
Address 1 D100(MSB) 21H
Sub address 20H D101(LSB) 20H
Command type 20H D101(MSB) 20H
D102(LSB) 30H
D102(MSB) 30H
D103(LSB) 38H
Data item &H80
D103(MSB) 30H
D104(LSB) 44H
Checksum D104(MSB) 37H
Delimiter (ETX) 03H D105(LSB) 03H
Communication setting [MOVP H0C86 D8120]
Reading [RS D100 K11 D106 K26]
1 [MOV H2102 D100]
2 [MOV H2020 D101]
3 [MOV H3030 D102]
4 [MOV H3038 D103]
5 [MOV H3744 D104]
6 [MOV H03 D105]
• Setting (Top D register: D120)
Address 1, SV setting [When setting SV to 600 (0258H)]
Sending Data (STX)(!)( )(P)(0)(0)(0)(1)(0)(2)(5)(8)(D)(F)(ETX)
Command Register Code
Header (STX) 02H D120(LSB) 02H
Address 1 D120(MSB) 21H
Sub address 20H D121(LSB) 20H
Command type P D121(MSB) 50H
D122(LSB) 30H
D122(MSB) 30H
D123(LSB) 30H
Data item &H1
D123(MSB) 31H
D124(LSB) 30H
D124(MSB) 32H
D125(LSB) 35H
Data item 600
D125(MSB) 38H
D126(LSB) 44H
Checksum D126(MSB) 46H
Delimiter (ETX) 03H D127(LSB) 03H
Setting [RS D120 K15 D128 K22]
1 [MOV H2102 D120]
2 [MOV H5020 D121]
3 [MOV H3030 D122]
4 [MOV H3130 D123]
5 [MOV H3230 D124]
6 [MOV H3835 D125]
7 [MOV H4644 D126]
8 [MOV H03 D127]

15
8. Set value digital transmission
By connecting to Shinko programmable controllers [PC-900, PCD-33A with options SVTC (set value digital
transmission)], set values can be received from the programmable controllers.
8.1 Wiring
For Set value digital transmission, connect YA(-) with YA(-), YB(+) with YB(+), SG with SG terminals
respectively in the same way as the Serial communication (RS-485).
Up to 31 units of the ACS-13A can be connected.
The following shows connection example of PCD-33A and ACS-13A units.
PCD-33A ACS-13A
8.2 Setting method of the programmable controller (PCD-33A) and ACS-13A
(1) Setting the PCD-33A
If SVTC option is added to the PCD-33A, none of setting is required.
Check that Set value digital transmission ( ) is selected during Communication protocol selection
( ) in Auxiliary function setting mode 1.
(2) Setting the ACS-13A
Check the following items in the Auxiliary function setting mode. (Refer to Chapter “3. Communication
parameter setting”.)
(a) Shinko protocol has been selected during Communication protocol selection
(b) Communication speed of the ACS-13A is equal to that of the PCD-33A.
(3) Starting Set value digital transmission
Input the program set values to the PCD-33A.
If the program is executed by pressing the RUN key, set values of the PCD-33A will be sent to the ACS-13A.
During program standby, “0” will be sent to the ACS-13A.
9. Specifications
Cable length : Max. communication distance 1.2km
Cable resistance: Within 50 (Terminator is not necessary or 120 or more on one side.)
Communication interface: EIA RS-485
Communication method : Half-duplex communication
Communication speed : 2400/4800/9600/19200bps (Selectable by keypad) (Default: 9600bps)
Synchronization : Start-stop synchronization
Code form : ASCII, binary
Data bit/Parity : 7 bits, 8bits/Even, Odd and No parity (Selectable by keypad) (Default: 7 bits/Even parity)
Stop bit : 1, 2 (Selectable by keypad) (Default: 1)
Communication protocol: Shinko protocol/ Modbus ASCII/ Modbus RTU (Selectable by keypad) (Default: Shinko protocol)
Data format
Communication protocol Shinko protocol Modbus ASCII Modbus RTU
Start bit 1 1 1
Data bit 7 7 or 8 8
Parity Yes (Even) Yes (Even, Odd) No parity Yes (Even, Odd) No parity
Stop bit 1 1 or 2 1 or 2
Number of connectable units: Maximum 31 units to 1 host computer
Error correction : Command request repeat system
Communication error detection: Parity, checksum(Shinko protocol), LRC(Modbus ASCII), CRC-16(Modbus RTU)
Digital external setting : Receives digital set values from Shinko programmable controllers (PC-900,
PCD-33A with the SVTC option)
Shielded
wire
Shielded wire
Shielded wire
FG
FG
FG
(Fig 8.1-1)

16
10. Troubleshooting
If any malfunctions occur, refer to the following items after checking the power supply to the master
and the slave.
• Problem: Communication failure
Check the following
Make sure that communication connector is securely connected.
Check that wiring of the communication connector is correct.
Refer to “2. Wiring”.
Burnout or imperfect contact on the communication cable and the connector.
Communication speed of the slave does not coincide with that of the master.
Refer to “3. Communication parameter setting”.
The data bit, parity and stop bit of the master do not accord with those of the slave.
Refer to “3. Communication parameter setting”.
The instrument number (address) of the slave does not coincide with that of the command.
Refer to “3. Communication parameter setting”.
The instrument numbers (addresses) are duplicated in multiple slaves.
Refer to “3. Communication parameter setting”.
Make sure that the program is appropriate for the transmission timing.
Refer to “4. Communication procedure”.
•Problem: Although communication is occurring, the response is 'NAK'.
Check the following
Check that a non-existent command code has not 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 ACS-13A 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
:
:
:
Reg. Office
URL
E-mail
2-5-1, Senbahigashi, Minoo, Osaka, Japan
http://www.shinko-technos.co.jp
[e-mail]
Tel :
Fax:
81-72-727-6100
81-72-727-7006