Issue:
It is unclear which Modbus TCP/IP driver to use in Vijeo Designer.

Product Line:
Vijeo Designer (all versions)

Resolution:
To select the correct driver, you must determine if the device you wish to connect to is a Modbus Client (requestor) or if the device is a Modbus Server (responder).

HMI (Client) ---> PLC or Device (Server):
If the device outside the HMI is the Modbus server, the best driver is to use the Modbus TCP/IP driver. This makes the HMI the Client and the device the "PLC". The HMI will read the device's Modbus registers like a regular PLC.

Device (Client) ---> HMI (Server):
If the device which is talking to the HMI is the Client, the best driver to use is the Modbus TCP Server driver of Vijeo Designer. This makes the HMI essentially act like a typical PLC and the client device outside of the HMI will read the HMI's own internal Modbus registers.


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Publié pour: Schneider Electric Belgium