5500NAC/SHAC acting as Modbus/TCP server (i.e. slave)

Discussion in 'C-Bus Automation Controllers' started by Kelvin, Sep 26, 2019.

  1. Kelvin


    Jan 10, 2018
    Likes Received:
    Hi Folks,

    I have a need to have a BMS PLC able to see all the C-Bus group levels and change them from time to time via Modbus.

    The 5500NAC/SHAC has lots of documentation for the device acting as a Modbus master (i.e. client) and the profile system that supports that, however I've not seen anything about it acting as a Modbus slave (i.e. server).

    Has anyone else tried to do this before and found a solution?

    From a previous thread I found the link to Logic Machine (who built the 5500NAC/SHAC for =SE=) and their forums and found the following as an example of doing exactly what I want with KNX:


    Before I jump into porting this for C-Bus support instead of KNX support (and they are conceptually very similar - I've used both over many years) I just wanted to make sure I wasn't reinventing the wheel.

    If no one else has solved this and I use the code above as the basis for a Modbus/TCP server (i.e. slave) I'll post the code here to share with the group.

    Kelvin, Sep 26, 2019
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