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Communication Instruction Manual ACS-13A (C5)

3. Communication parameter setting

No. ACS11CJE4 2011.04
This manual contains instructions for communication functions. For detailed operating instructions,please download the detailed Communication instruction manual for the ACS-13A (C5) at
http://www.shinko-technos.co.jp/e/ by clicking “Download”.

(1)

1. System configuration(2)

Communication converter IF-400
RS-232C
RS-485+(Approx.3sec)(Twice)ACS-13A
No. 0

ACS-13A
No. 1(4)

Instrument number setting
Set the instrument number of the controller individuallywhen communicating by connecting plural instruments.
0 to 95 (Default: 0)(5)

Communication speed selection
Set the communication speed equal to that of the hostcomputer.
: 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(Fig. 1-1)

Wiring examples when using a communication converter IF-400
Host computer

Shieldedwire
FG
Shielded wireFG
D-sub 9-pin connector

Shielded wire

(Fig. 2-1)

4. Communication procedure

Communication starts with command transmission from the host computer (Master) andends with the response of the ACS-13A (Slave).
MasterFG
FG

Command
Data

Host computer

Shielded wire

Auxiliary function setting mode
Press thekey twice.
The unit proceeds to Communication protocol selection.
Communication protocol selection
Select the communication protocol.
: Shinko protocol (Default): Modbus ASCII mode
: Modbus RTU mode

ACS-13A
No. 30

ACS-13A (Max. 31 units)

Proceed to Auxiliary function setting mode.
Press thekey for approx. 3sec while pressing the
key in the PV/SV display mode.
The unit proceeds to Auxiliary function setting mode.

(3)

Host computer

2. Wiring

5. Shinko protocol

Set each communication parameter following the procedures below.

To ACS-13A

Slave • Response with data
When the master sends the reading command, the slave
responds with the corresponding set value or current
status.

Command
Acknowledgement• Acknowledgement
When the master sends the setting command, the slave
responds by sending the acknowledgement after theprocessing is terminated.

Command
Negative
Acknowledgement• Negative acknowledgement
When the master sends a non-existent command orvalue out of the setting range, the slave returns anegative acknowledgement.

Shielded wire
Connect only one side of the shielded wire to the FG terminal so that current cannot flow to theshielded wire. If both sides 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 shieldedwire and this may cause noise. Be sure to ground the FG terminal.

• No response
The slave will not respond to the master in the following cases:• Global address, Broadcast address (Modbus protocol) is set.
• Communication error (framing error, parity error)• Checksum error (Shinko protocol)• LRC discrepancy (Modbus ASCII mode)• CRC-16 discrepancy (Modbus RTU mode)
RS-485 communication timing
Master side (Notice on programming)
Set the program so that the master can disconnect the transmitter from the communicationline within a 1 character transmission period after sending the command in preparation forreception 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.
If a response to the command is not returned due to communication errors, set the Retry
Processing so as to send the command again. (Retry twice or more is recommended.)Terminator (Terminal resistor)
The 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.

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 withina 1 character transmission period after sending the response.

CommandD-sub 25-pin connector(Fig. 2-2)

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 parity/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)
Slave address
Slave address is an individual instrument number on the slave side and is set within therange 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.
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.
For example, when the master sends request message setting 10H to 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 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.
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, e.g. AT is performing)
18 (12H)
Shinko error code 5 (During setting mode by keypad operation)
Data
Data depends on the function code.
A request message from the master is composed of data item, number of data and settingdata.
A response message from the slave is composed of number of bytes, data and exception
code in negative acknowledgements.
The number of data to be dealt with in one message is “1”. Therefore, the number ofdata 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 below.
(2) Error check of ASCII mode
After calculating LRC (Longitudinal Redundancy Check) from the slave address to the endof data, the calculated 8-bit data is converted to two ASCII characters and are appended tothe 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.
6.3 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 characters transmission time or less
(1) Message configuration
RTU mode is configured to start after idle time is processed for more than 3.5 charactertransmissions and end after idle time is processed for more than 3.5 character transmissions.
3.5 idle
Slave
FunctionError check3.5 idleDatacharacters addresscode
CRC-16characters
Slave address : The same as that of ASCII mode
Function code : The same as that of ASCII mode
Data
: Data depends on the function code.

No response

A request message from the master is composed of data item, number of data andsetting data.
A response message from the slave is composed of number of bytes, data andexception codes in negative acknowledgement.
The number of data to be dealt with in one message is “1”. Therefore the number ofdata 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”.
(2) Error check of RTU mode
After calculating CRC-16 (Cyclic Redundancy Check) from the slave address to the end ofdata, the calculated 16-bit data is appended to the end of message in sequence from low
order to high order.
How to calculate CRC-16
In the CRC-16 system, the information is divided by polynomial series. The remainder isadded to the end of the information and transmitted. The generation of polynomial series is
16
15
2
as follows. (Generation of polynomial series: X + X + X + 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 thefixed value (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 last data.
9 Set X as CRC-16 to the end of the message in sequence from low order to high order.

7. Communication command table
ShinkoModbusData item
command type function code
20H/50H
03H/06H
0001H SV
20H/50H
03H/06H
0003H Auto-tuning/Auto-reset
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

0004H
0005H
0006H
0007H
0008H
0009H
000BH
000CH
000FH
0012H

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

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

0015H
0016H
0018H
0019H
001AH

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

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

001BH
001CH
001DH
001EH
001FH

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

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

0020H
0021H
0022H
0023H

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

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

0024H
0025H
0026H
0029H
002AH
0032H

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

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

0033H
0034H
0037H

20H/50H

03H/06H

0038H

20H/50H
20H/50H

03H/06H
03H/06H

0039H
0040H

20H/50H

03H/06H

0041H

Data

Set value, Decimal point ignored
0000H: Cancel
0001H: Perform
OUT1 proportional bandSet value, Decimal point ignored
OUT2 proportional bandSet value, Decimal point ignored
Integral time
Set value
Derivative time
Set value
OUT1 proportional cycle Set value
OUT2 proportional cycle Set value
Alarm 1 value
Set value, Decimal point ignored
Alarm 2 value
Set value, Decimal point ignored
Heater burnout alarm value Set value, Decimal point ignored
Set value lock
0000H: Unlock 0002H: Lock 2
0001H: Lock 1 0003H: Lock 3
Sensor correction
Set value, Decimal point ignored
Overlap/Dead bandSet value
Scaling high limit
Set value, Decimal point ignored
Scaling low limit
Set value, Decimal point ignored
Decimal point place
0000H: xxxx 0002H: xx.xx
0001H: xxx.x 0003H: x.xxx
PV filter time constantSet value, Decimal point ignored
OUT1 high limit
Set value
OUT1 low limit
Set value
OUT1 ON/OFF hysteresis Set value, Decimal point ignored
OUT2 action mode
0000H: Air cooling
0001H: Oil cooling
0002H: Water cooling
OUT2 high limit
Set value
OUT2 low limit
Set value
OUT2 ON/OFF hysteresis Set value, Decimal point ignored
Alarm 1 type
0000H: No alarm action
0005H: Process high alarm
0001H: High limit alarm
0006H: Process low alarm
0002H: Low limit alarm
0007H: High limit w/standby
0003H: H/L limits alarm
0008H: Low limit w/standby
0004H: H/L limit range
0009H: H/L limits w/standby
Alarm 2 typeThe same as Alarm 1 type
Alarm 1 hysteresis
Set value, Decimal point ignored
Alarm 2 hysteresis
Set value, Decimal point ignored
Alarm 1 action delay timer Set value
Alarm 2 action delay timer Set value
Indication when output
0000H: OFF indication
OFF
0001H: No indication
0002H: PV indication
0003H: PV+ Alarm action
SV rise rate
Set value, Decimal point ignored
SV fall rate
Set value, Decimal point ignored
Control output OUT/OFF 0000H: Control output ON
0001H: Control output OFF
Auto/Manual control
0000H: Automatic control
0001H: Manual control
Manual control MV
Set value
Alarm 1 Energized/
0000H: Energized
De-energized
0001H: De-energized
Alarm 2 Energized/
0000H: Energized
De-energized
0001H: De-energized

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
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) is converted to hexadecimal numbers.
A negative number is represented by 2's complement.
Numerals written below the command represent number of characters.
(1) Setting command
Header Address Sub address Command Data
Data Checksum Delimiter
(02H)
(20H)
type(50H)
item
(03H)
1
1
1
1
4
4
2
1
(2) Reading command
Header Address Sub address Command Data Checksum Delimiter
(02H)
(20H)
type(20H)
item
(03H)
1
1
1
1
4
2
1
(3) Response with data
Header Address Sub address Command Data
Data Checksum Delimiter
(06H)
(20H)
type(20H)
item
(03H)
1
1
1
1
4
4
2
1
(4) Acknowledgement
Header Address Checksum Delimiter
(06H)
(03H)
1
1
2
1
(5) Negative acknowledgement
Header Address Error code Checksum Delimiter
(15H)
(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
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 fixedCommand 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) differ 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 section 5.3.)
Delimiter: ASCII code ETX (03H) fixed. Control code to represent the end of command.
Error code
: Represents an error type with ASCII codes.
1 (31H)-----Non-existent command
2 (32H)-----Not used
3 (33H)-----Setting out of 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 datafrom the slaves so that the communication errors can be checked.
The ASCII code (hexadecimal) corresponding to the characters which range from theaddress to that before the checksum is converted to binary notation, and the total value iscalculated. The lower 2-digits of the total value are converted to 2’s complement, and thento hexadecimal numbers, 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 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 by ASCII]
02H

20H

20H

50H

30H

30H

30H

[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

31H

45H 30H

03H

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

1101 1111
11110 0000
E

0

45H

30H

Checksum

ShinkoModbusData item
Data
command type function code
20H/50H
03H/06H
0044H Input type
0000H: K -200 to 1370
000FH: K -320 to 2500
0001H: K -200.0 to 400.0 0010H: K -320.0 to 750.0
0002H: J -200 to 1000
0011H: J -320 to 1800
0003H: R 0 to 1760
0012H: R 0 to 3200
0004H: S 0 to 1760
0013H: S 0 to 3200
0005H: B 0 to 1820
0014H: B 0 to 3300
0006H: E -200 to 800
0015H: E -320 to 1500
0007H: T -200.0 to 400.0 0016H: T -320.0 to 750.0
0008H: N -200 to 1300
0017H: N -320 to 2300
0009H: PL- 0 to 1390
0018H: PL- 0 to 2500
000AH: C(W/Re5-26)
0019H: C(W/Re5-26)
0 to 2315
0 to 4200
000BH: Pt100
001AH: Pt100-200.0 to 850.0-320.0 to 1500.0
000CH: JPt100
001BH: JPt100-200.0 to 500.0-320.0 to 900.0
000DH: Pt100
001CH: Pt100-200 to 850-320 to 1500
000EH: JPt100
001DH: JPt100-200 to 500-320 to 900
001EH: 4 to 20mA -2000 to 10000001FH: 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
20H/50H
03H/06H
004AH OUT1 rate-of-change
Set value
20H/50H
03H/06H
0050H Backlight
0000H: All are backlit
0001H: PV display backlit
0002H: SV display backlit
0003H: Action indicators backlit
0004H: PV+SV displays backlit
0005H: PV+Action indicators backlit
0006H: SV+Action indicators backlit
20H/50H
03H/06H
0051H PV color
0000H: Green
0004H: When Alarm ON:
0001H: Red
OrangeRed
0002H: Orange
0005H: PV continuous change
0003H: W hen Alarm ON: 0006H: PV continuous
Green
Red
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
0000H: No action
flag clearing
0001H: Clear all
20H
03H
0080H PV (Process variable)
Current PV (Process variable), Decimal point ignored
20H
03H
0081H OUT1 MV
OUT1 MV, Decimal point ignored
20H
03H
0082H OUT2 MV
OUT2 MV, Decimal point ignored
20H
03H
0083H SV (When SV rises or falls) Current SV (Desired value),
Decimal point ignored
20H
03H
0085H Status flag
20: OUT1
0: OFF, 1: ON(DC current output: Not fixed)
1
2 : OUT2
0: OFF, 1: ON
22: Alarm 1 output
0: OFF, 1: ON
3
26: Alarm 2 output
0: OFF, 1: ON
2 : Heater burnout alarm output 0: OFF, 1: ON(When sensor burnout, 0: OFF)8
29: Overscale
0: OFF, 1: ON
2 : Underscale
0: OFF, 1: ON
210: Control output OUT/OFF 0: ON, 1: OFF
11
212: During AT/Auto-reset 0: OFF, 1: DuringAT/Auto-reset
2 : OUT/OFF key function 0: OUT/OFF function
1: Auto/Manual control
14215: Auto/Manual control
0: Auto, 1: Manual
2 : Change in key operation 0: No, 1: Yes
45
7
13
Not used, Always 0
2,2,2,220H
03H
0086H CT1 current valueCT1 current value,
Decimal point ignored
20H
03H
0087H CT2 current valueCT2 current value,
Decimal point ignored

8. Specifications
Cable length: 1.2km (Max.), Cable resistance: 50 or less (Terminators are notnecessary, 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, 19200bps) Selectable by keypad
Synchronization method : Start-stop synchronization
Code: ASCII, Binary
Error correction: Command request repeat system
Shinko Technos. Co., Ltd.
URL: http://www.shinko-technos.co.jp
2-5-1, Senbahigashi, Minoo, Osaka, Japan TEL: 81-72-727-6100 FAX: 81-72-727-7006