Write Holding Registers Service (50 Hex) - Comtrol DeviceMaster EtherNet/IP-Modbus EIP-MOD User Manual

| Write Holding Registers Service (50 Hex)

10.6. Write Holding Registers Service (50 Hex)
This service writes one or more holding registers to the Modbus Holding Registers table. This service results
in the DeviceMaster EIP-MOD issuing a Write Multiple Registers function (function code 0x10) to either the
Shared Memory or the Modbus Message Routing subsystem. Refer to CIP Standard Vol1_3.22 Section 5B-3
and/or MODBUS Application Protocol Specification V1.1b3.pdf at
Parameter
Service Code 50 hex
Instance 12
Class 44 hex
Attribute 0
Source
WdHoldingRegsReqData
Element
Source Length 250
Destination WdHoldingRegsRespData Tag of structure type WrHoldingRegsResponse
DeviceMaster EIP-MOD User Guide: 2000664 Rev. A
Value
Directly corresponds to Modbus function code:
Write Holding Registers (function code 16)
Modbus Device ID of 12
(Valid Range = 1 to 255)
Modbus Object
Not used
Tag of structure type WrHoldingRegsRequest
Maximum length in bytes of WrHoldingRegsReqData
(Length must be greater or equal to length of request message.)
www.modbus.org
Description
Chapter 10. PLC Programming for Modbus Object (44 Hex) - 137
for more details.