I am having issues setting up the Modbus TCP to communicate with an AnyBus Communicator 7072. In the AB7072 I can see all the data that is being read from a device on Modbus. I am using Modbus Poll to verify that the AB7072 has the data available to read. The data all lines up.
I have configured a single tag to read a single the input register 2 in the AB7072. The OPC item path for the tag is [Modbus]1.IRF2. The tag is valid with a value of zero. If I change the OPC item path to read a HRF or a different node, the tag will become null and invalid. The tag becomes valid as soon as I change the OPC item path back. So I believe I am communicating with the AB7072 through the Modbus TCP device that I have configured. I know there are a bunch of different settings in the Modbus TCP device and I have changed some of the settings but the value of the tag stays at 0.
I have spent a lot of time trying to get this Modbus communication working. Any help would be greatly appreciated!!!