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How do I setup the communications between the Magelis and a Modicon NOC module?

Issue

How do I setup the communications between the Magelis and a Modicon NOC module over Modbus TCP?

Product Line

Magelis, Harmony, Vijeo Designer,
EcoStruxure Control Expert X80 Communication Modules: BMENOC, 140NOC

Environment

Physical HMI communication to PLC Communications module

Resolution
In order to get communications between the Magelis and the NOC module besides having the IP address, you need to assign a Unit ID of any value except for 255. Unit ID 255 on the NOC module is assigned to an internal diagnostics. My recommendation is to set the Unit ID to 1 in the Vijeo Designer Modbus Equipment.