Schneider M340 with Westermo GDW 11


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I am trying to configure an Schneider M340 PLC to send and receive SMS messages from a Westermo GDW 11 modem. The application requires messages to be sent to the PLC. and if the message is stored within the PLC, it will act upon it and also alarm text to be sent from the PLC to the modem. Has anyone done an application similar to this and possibly have some sample code?

Any help would be much appreciated.