To answer Kevin Fitzgerrell's question, I am opening the loop at the FBM.
Neither the detail display nor system management shows anything awry. The
output is therefore not initialized and can be manipulated.
My experience agrees with what Rick Rys said. I was hoping that the FBM could
be coerced into reading back its loop output current and comparing it with what
was being asked for by the FBM, and alarm if these were different. The other
system I have experience with (Honeywell) does this and generates an alarm and
initializes upstream blocks if the commanded output current and the actual loop
current do not agree. It is a handy troubleshooting tool and I miss it :-(
Corey Clingo
Sr. Engineer
BASF Corp.
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