10. Appendix A
10.2. Standard Function Blocks
R400 Experion PKS Series A Fieldbus Interface Module User's Guide 401
July 2010 Honeywell
Function Notes
Supports Out of Service (OOS), Initialization Manual
(IMan), Local Override (LO), Manual (Man), and
Remote-Out (ROut) modes.
Accepts output from an AI block as its input (IN) to get
a PV filtered by PV_FTIME.
The block's algorithm uses value and status for
alarming only.
If selected, the STATUS_OPTS of IFS if BAD IN will
work.
The BKCAL_IN value and status can force balancing
of the output.
The TRK_VAL input brings in an external value or
uses a constant. The TRK_SCALE values convert the
TRK_VAL to a percent of output span value. If the
CONTROL_OPTS Track Enable selection is true and
TRK_IN_D is true, the converted TRK_VAL replaces
the output (OUT), when the block is in Remote-Out
(ROut) mode. The CONTROL_OPTS Track in Manual
selection must be true for this to occur in Manual
mode. If the actual mode is OOS or IMan, the track
request is ignored.
If the TRK_VAL replaces the OUT, its status becomes
Locked Out with Limits set to Constant. The actual
mode goes to LO. The status of ROUT_OUT goes to
Not Invited (NI), if not already there.
If the status of TRK_IN_D is Bad, its last usable value
will be maintained and acted upon. If the device
restarts, losing the last usable value, it will be set to
false.
If the status of TRK_VAL is Bad, the last usable value
will be used. If there is no last usable value, the
present value of the OUT will be used.
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