I don't remember the syntax of the db file, but here this calc channel computes A&B. And A&B corresponds to INPA and INPB.
field(CALC,"A&B") field(INPA,"C1:SUS-LO1_UL_COMM PP NMS") field(INPB,"C1:SUS-LO1_LATCH_OFF PP MS")
What is this LATCH doing?