Emerson Rosemount OCX 8800 Reference Manual page 163

Table 7-27: PID function block system parameters
Parameter
DV_HI_PRI
DV_LO_ALM
DV_LO_LIM
DV_LO_PRI
ERROR
FF_ENABLE
FF_GAIN
FF_SCALE
GAIN
GRANT_DENY
HI_ALM
Reference Manual
Index number
56
65
59
56
67
70
42
41
23
12
61
(continued)
Units
None
None
EU of PV_SCALE
None
EU of PV_SCALE
None
None
None
None
None
None
Foundation Fieldbus
Descriptions
The priority of the deviation
high alarm.
The DV LO alarm data,
which includes a value of
the alarm, a timestamp of
occurrence, and the state of
the alarm.
The setting for the alarm
limit used to detect the de-
viation low alarm condition.
The priority of the deviation
low alarm.
The error (SP-PV) used to
determine the control ac-
tion.
Enables the use of feedfor-
ward calculations.
The feedforward gain value.
FF_VAL is multiplied by FF_
GAIN before it can be added
to the calculated control
output.
The high and low scale val-
ues, engineering units code,
and number of digits to the
right of the decimal point
associated with the feedfor-
ward value (FF_VAL).
The proportional gain value.
This value cannot equal 0.
Options for controlling ac-
cess of host computers and
local control panels to oper-
ating, tuning, and alarm pa-
rameters of the block. Not
used by the device.
The HI alarm data, which in-
cludes a value of the alarm,
a timestamp of occurrence,
and the state of the alarm.
153