OPC communication error
I have make my AC500 program on Automation Builder 2.1, I have ABB zenon scada 7.6 I had make previously the driver OPC 2.0 in zenon scada and it was communicating I also configure the Codesys OPC configurator and OPC configurator and both are set in tcp/ip mode with my plc ip and gateway are configured as local but suddenly the communication had gone and the opc driver in zenon editor and runtime are not communicating. Can anyone help me for what are the best driver for zenon scada with AC500(PM591) PLC and how to configure it properly to get uninterrupted communication. Regards,
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