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F
Fieldbus
™
OUNDATION
December 2022
Table 8-25: PID Function Block System Parameters
Parameter
RCAS_OUT
RESET
ROUT_IN
ROUT_OUT
SHED_OPT
SP
SP_FTIME
SP_HI_LIM
SP_LO_LIM
SP_RATE_DN
174
Index number
35
24
33
36
34
08
69
21
22
19
(continued)
Units
EU of PV_SCALE
Seconds per repeat
EU of OUT_SCALE
EU of OUT_SCALE
None
EU of PV_SCALE
Seconds
EU of PV_SCALE
EU of PV_SCALE
EU of PV_SCALE per
second
Manual
00809-0500-4880
Descriptions
Block setpoint and status
after ramping, filtering,
and limiting that is
provided to a supervisory
host for back calculation
to allow action to be
taken under limiting
conditions or mode
change. Used when mode
is RCAS.
The integral action time
constant.
Target output and status
that is provided by a
supervisory host. Used
when mode is ROUT.
Block output that is
provided to a supervisory
host for a back calculation
to allow action to be
taken under limiting
conditions or mode
change. Used when mode
is RCAS.
Defines action to be taken
on remote control device
time-out.
The target block setpoint
value. It is the result of
setpoint limiting and
setpoint rate of change
limiting.
The time constant of the
first-order SP filter. It is
the time required for a 63
percent change in the IN
value.
The highest SP value
allowed.
The lowest SP value
allowed.
Ramp rate for downward
SP changes. When the
ramp rate is set to zero,
the SP is used
immediately.
Emerson.com/Rosemount
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