I started testing the Modbus driver using an Acromag Combination Digital & Analog I/O module.
Below are few issue I ran into that need clarification.
1- Changing the device addressing table required multiple saves before the device would connect.
2- The OPC Quick Client Status = Good, Value = Correct value in the device, and Quality = Bad_NoDataAvailable. Why would the Quality field indicate Bad_NoDataAvailable?
3- Trying to write a value to a coil address stops the OPC Quick Client from reading the device data.
This not an issue but why can’t you use an underscore in the Device Name? The program works correctly and does prompt you to use alphanumeric characters only.