I have Modbus TCP device which has some holding register that is Write Only and use for resting Counter or save the setting of device when Master write the value of 1 on them. The read operation on these address will fail.
The problem is in ignition defining tag access right group in two read only and read/write.
The read/write cause Ignition try to read it and cause the tag quality get BAD and subsequently the write operation will fail because of that.
Is there any workaround for this?
Don’t define a tag in Ignition for that register. Use the
system.opc.write*() script functions to write directly to that address when needed.