Emerson Rosemount OCX 8800 Reference Manual page 166

Foundation Fieldbus
Table 7-27: PID function block system parameters
Parameter
ROUT_OUT
SHED_OPT
SP
SP_FTIME
SP_HI_LIM
SP_LO_LIM
SP_RATE_DN
SP_RATE_UP
SP_WORK
STATUS_OPTS
STRATEGY
156
Index number
36
34
08
69
21
22
19
20
68
14
03
(continued)
Units
EU of OUT_SCALE
None
EU of PV_SCALE
Seconds
EU of PV_SCALE
EU of PV_SCALE
EU of PV_SCALE per second
EU of PV_SCALE per second
EU of PV_SCALE
None
None
Descriptions
Block output that is provi-
ded 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 set-
point limiting and setpoint
rate of change limiting.
The time constant of the
first-order SP filter. It is the
time required for a 63 per-
cent change in the IN value.
The highest SP value al-
lowed.
The lowest SP value al-
lowed.
Ramp rate for downward SP
changes. When the ramp
rate is set to zero, the SP is
used immediately.
Ramp rate for upward SP
changes. When the ramp
rate is set to zero, the SP is
used immediately.
The working setpoint of the
block after limiting and fil-
tering is applied.
Allows you to select options
for status handling and pro-
cessing. The supported sta-
tus option for the PID block
is Target to Manual if Bad IN.
The Strategy field can be
used to identify groupings
of blocks. This data is not
checked or processed by the
block.
OCX 8800