I have a problem with reading the modbus register of an Elster EK220 volume converter. I have configured it as a Modbus TCP device, I have identified the registers I am interested in reading HR 327 and 329, I have tried with Modbus Poll software and I read them correctly, when I enter them in ignition I no longer read them. It says in the device manual that the registers are 2 Float 32BIT. I have done all possible tests but to no success.
Have you check all combinations of "zero-based addressing" and "swap words" in the IA driver? (Advanced settings.)
I'd expect an address like this to work, possibly with Swap Words enabled in the driver settings: