Force Setpoint with EDC in Cascade Mode

I am using the EDC and DCC blocks for the first time but I am having an issue. I am using the Force Setpoint capability but I'm struggling to get it to work when the EDC block in in Cascade mode. I have the Force Setpoint in CAS option selected in DEVICE_OPTS but the Force Setpoint does not override the setpoint  externally wired to the CAS_IN_D. According to BOL, the Force Setpoint should be used but this is not the behavior that I am witnessing on my simulate system ( I have not tried it on a controller yet). The Force Setpoint works as intended in Auto mode. Any ideas?

From BOL:

If:
the Force Setpoint in CAS device option is selected, and
the actual mode is Cascade, and
FORCE_SP_D transitions from False to True, and
there is no shutdown or interlock active, and
the permissive conditions are satisfied (SHUTDOWN_D is False, INTERLOCK _D is True, and PERMISSIVE_D is True),
then CAS_IN_D is a copy of FORCE_SP_VAL, even if CAS_IN_D is wired externally (CAS_IN_D behaves like SP_D when SP_D is wired externally).

  • Josh,

    Change what you have wired to EDC/CAS_IN_D to be an internal reference to that parameter (remove the wire) and it should work properly. I thought that it was documented to not have a wire but your excerpt says otherwise. This is why the CAS_IN_D isn't show as an input parameter like the DC block was prior.