Vendor Specific Write Single Coil Service (70 Hex) - Comtrol DeviceMaster EtherNet/IP-Modbus EIP-MOD User Manual

| Vendor Specific Write Single Coil Service (70 Hex)

10.7. Vendor Specific Write Single Coil Service (70 Hex)
This service writes one coil to the Modbus Coils table. This service results in the DeviceMaster EIP-MOD
issuing a Write Single Coil function (function code 0x05) to either the Shared Memory or the Modbus Message
Routing subsystem. Refer to MODBUS Application Protocol Specification V1.1b3.pdf at
more details.
Note: In order to use this service, the Enable Vendor Specific Modbus Object Services option on the EtherNet/
IP Stack Configuration web page must be selected.
Parameter
Service Code
Instance
Class
Attribute
Source Element
Source Length
Destination
DeviceMaster EIP-MOD User Guide: 2000664 Rev. A
Value
70 hex
8
44 hex
0
WrSingleCoilReqData
4
WrSingleCoilRespData Tag of structure type WrSingleCoilResponse
Description
Directly corresponds to Modbus function code:
Write Single Coil (function code 5)
Modbus Device ID of 8
(Valid Range = 1 to 255)
Modbus Object
Not used
Tag of structure type WrSingleCoilRequest
Length in bytes of WrSingleCoilReqData
Chapter 10. PLC Programming for Modbus Object (44 Hex) - 141
www.modbus.org for