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Can modbus port of the communication module TM171AMB be used as second master for TM172P controller

ONLY one Modbus Master for each M172P.
If you try to declare two master with new EcoStruxure Machine Expert HVAC, you will have a compiler error.
With SoMachine 2.4.1 you haven't a compiler error, but, at the end, M172 will use like Master only one port.
Your customer has to decide which modbus master, between RS-485-2 and RS-485 plug-in.

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