I have a 750-450 RTD card which according to the manual has a status- and control byte to read diagnostic information.
How exactley can I implement this into my Codesys project?
Does the card have additional Modbus-registers for reading the status or am I missing something?
(The card is connected to a 750-362 Mobus TCP IO-node)
I searched for these diagnostic information , with the the CANopen fieldbus coupler.
For some communication fieldbuses these are not available. E.g. for the CANopen fieldbus.
Most 750 analog modules with the status and control bytes like you mention (including the 750-450) only make them available when used with Profinet or Profibus fieldbus couplers. Modbus couplers and even PFC controllers do not usually have access to those bytes.