Comtrol Modbus TCP User Guide - Manual (Page 93)

DeviceMaster UP Modbus/TCP User Guide: 2000447 Rev. I Appendix A. Programming the PLC via Concept- 93
Modbus/TCP Slot/Index and DeviceMaster UP IP Address Definition
A.2.2.6. Modbus/TCP Slot/Index and DeviceMaster UP IP Address Definition
The following screen displays the AddrFld used in all Concept Modbus/TCP messages.
Where: The first entry (511 or 1FF hex) denotes the following:
Byte 1
• LS byte must be 255 (FF hex) to indicate to the DeviceMaster UP that this is raw/
ASCII serial data.
• MS byte: Momentum PLC = 1
• Quantum PLC = Slot number of Ethernet card
• Compact PLC = Slot number of Ethernet card
Byte 2 MS byte of IP Address.
Byte 3 Second byte of IP Address.
Byte 4 Third byte of IP Address.
Byte 5 LS byte of IP Address.