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Shinko ACS-13A Communication Instruction Manual
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Shinko ACS-13A Communication Instruction Manual

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COMMUNICATION INSTRUCTION MANUAL
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
Communication converter IF-400
RS-232C
Host computer
2. Wiring
When using communication converter IF-400
[D-sub 25-pin connector]
Host computer
Shield
wire
D-sub 25-pin connector
Shield wire
Connect only one end of the shield to the FG to avoid a ground loop. If both ends of the shield wire are
connected to the FG, the circuit will be closed, resulting in a ground loop. This may cause noise.
Be sure to ground the FG.
Recommended cable: OTSC-VB 2PX0.5SQ (made by Onamba Co., Ltd.) or equivalent (use a twisted pair
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 multiple peripheral devices to a personal
computer. The terminator prevents signal reflection and disturbance.
Do not connect the terminator to the communication line because each ACS-13A has built-in pull-up and
pull-down resistors.
RS-485
ACS-13A
No. 0
(Fig. 1-1)
Host computer
To ACS-13A
cable.)
ACS-13A (C5)
ACS-13A
ACS-13A
No. 1
No. 30
[D-sub 9-pin connector]
Shield
FG
wire
D-sub 9-pin connector
(Fig. 2-1)
1
No. ACS12CE5 2019.08
ACS-13A (Max. 31 units)
Shield wire
FG
Shield wire
FG

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Summary of Contents for Shinko ACS-13A

  • Page 1 The terminator is mounted at the end of the wire when connecting multiple peripheral devices to a personal computer. The terminator prevents signal reflection and disturbance. Do not connect the terminator to the communication line because each ACS-13A has built-in pull-up and pull-down resistors.
  • Page 2 : 1 bit (Factory default) : 2 bits 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 Master Slave When the master sends the reading command, the slave Command responds with the corresponding set value or current status.
  • Page 3 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.
  • Page 4 Instrument number (Address): Numbers by which the master discerns each slave. Instrument numbers 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.
  • Page 5 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 Command Data item Checksum Delimiter address type [0080H] (02H) (21H) (20H) (20H) (30H 30H 38H 30H) (44H 37H) (03H) •...
  • Page 6 To transmit continuously, an interval between characters which consist of one message, must be within 3.5-character transmission times. If an interval lasts longer than 3.5-character transmission times, the ACS-13A assumes that transmission from the master is finished, which results in a communication error, and will not return a response.
  • Page 7 How to calculate LRC Create a message in RTU mode. Add all the values from the slave address to the end of data. This is assumed as X. Make a complement for X (bit reverse). This is assumed as X. Add a value of 1 to X.
  • Page 8 (3) Setting (Slave address 1, SV) • A request message from the master [When setting SV to 600 (0258H)] Header Slave Function Data item Data Error check Delimiter address code [0001H] [0258H] CR+LF (3AH) (30H 31H) (30H 36H) (30H 30H 30H 31H) (30H 32H 35H 38H) (39H 45H) (0DH 0AH)
  • Page 9 • When connecting multiple slaves, the address (instrument number) must not be duplicated. • MODBUS protocol uses Holding Register addresses. The Holding Register addresses are created as follows. A Shinko command data item is converted to decimal number, and the offset of 40001 is added. The result is the Holding Register address.
  • Page 10 Shinko MODBUS Command Function Data Item Data Type Code 20H/50H 03H/06H 0001H Set value (Decimal point ignored) 0000H: Cancel 20H/50H 03H/06H 0003H AT/Auto-reset 0001H: Perform 20H/50H 03H/06H 0004H OUT1 proportional band Set value (Decimal point ignored) 20H/50H 03H/06H 0005H OUT2 proportional band...
  • Page 11 Shinko MODBUS Command Function Data item Data Type Code 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 OFF function 0000H: Control output ON...
  • Page 12 Shinko MODBUS Command Function Data item Data Type Code 20H/50H 03H/06H 004AH OUT1 rate-of-change Set value 20H/50H 03H/06H 0050H Backlight selection 0000H: All are backlit 0001H: PV Display is backlit 0002H: SV Display is backlit 0003H: Action indicators are backlit...
  • Page 13 How to speed up the scan time When monitoring multiple units of ACS-13A, set the program so that requisite minimum pieces of data such as Data item 0080H (PV), Data item 0081H (OUT1 MV), Data item 0085H (Status flag), can be read. For other data, set the program so that they can be read only when their set value has changed.
  • Page 14 For SV digital transmission, connect YA(-) to YA(-), YB(+) to YB(+), SG to 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 a connection example of PCB1 and ACS-13A units.
  • Page 15 Setting’.) • ‘Shinko protocol’ has been selected in [Communication protocol]. • Communication speed of the ACS-13A is equal to that of the PCA1 or PCB1. (3) Starting SV digital transmission Enter the program setting values on the PCA1 or PCB1.
  • Page 16 The ACS-13A cannot be set Check the slave status. when functions such as AT are performing. The ACS-13A is in front keypad Return the instrument to RUN operation setting mode. mode. For all other malfunctions, please contact our main office or dealers.