Comtrol DeviceMaster EtherNet/IP-Modbus EIP-MOD User Manual page 139

| Write Holding Registers Service (50 Hex)
DeviceMaster EIP-MOD does not attempt to perform any endian conversion on the bytes in the data stream
(either request or response). Refer to CIP Standard Vol1_3.22 Section 5B-3 and/or MODBUS Application
Protocol Specification V1.1b3.pdf at
Parameter
Service Code 51 hex
Instance 12
Class 44 hex
Attribute 0
Source Element MbPassthroughReqData
Source Length 252
Destination MbPassthroughReqData
DeviceMaster EIP-MOD User Guide: 2000664 Rev. A
www.modbus.org
Value
Service code for a Modbus passthrough message.
Modbus Device ID of 12
(Valid Range = 1 to 255)
Modbus Object
Not used
Tag of structure type MbPassthroughReqResp
Maximum length in bytes of MbPassthroughReqData
(Length must be greater or equal to length of request
message.)
Tag of structure type MbPassthroughReqResp
for more details.
Description
Chapter 10. PLC Programming for Modbus Object (44 Hex) - 139