Specifications

Process Flow
IM/265/7/9/ADD/FF-EN_01 Connection to FOUNDATION Fieldbus 71
12.8 Troubleshooting
Few considerations about the most common wrong conditions that make the device not properly
working.
The AIFB or TB cannot be switched in AUTO mode
- Check that the RB must be in AUTO mode.
The AI Function Block has a BAD-Configuration Error in output
- Did you download the FB Application correctly?
- Check if the XD_SCALE setting is different by the OUT_SCALE setting. In this case, check
that the L_TYPE is INDIRECT.
- Check if the CHANNEL, L_TYPE, are still set with the initial value that is not valid for the
normal operations.
The PID Function Block cannot be switched in AUTO mode.
- Did you design and download the FB Application correctly?
- Set properly the SP value and status.
- Set with usable values the RATE, RESET, SHED_OPT, BY_PASS parameters.
- Check the status of the IN and BKCAL_IN, if BAD check the setting of the other blocks (AI,
AO, …).
The PID Function Block cannot be switched in CASCADE mode.
- In addition, at the above checking, check also the status of the CAS_IN, if BAD check the
setting of the CAS_IN source.