Emerson Fisher FIELDVUE DVC6000f Instruction Manual page 155

Table 4-31. PID Function Block System Parameters Definitions (Continued)
Label Index
PARAMETER_NAME Number
Deviation High Alarm
64
DV_HI_ALM
UNACKNOWLEDGED 64.1
ALARM_STATE 64.2
TIME_STAMP 64.3
SUBCODE 64.4
VALUE 64.5
Deviation Low Alarm
65
DV_LO_ALM
UNACKNOWLEDGED 65.1
ALARM_STATE 65.2
TIME_STAMP 65.3
SUBCODE 65.4
VALUE 65.5
Bias
66
BIAS
Error
67
ERROR
SP Work
68
SP_WRK
SP FTime
69
SP_FTIME
Math Form
70
MATHFORM
Structureconfig
71
STRUCTURECONFIG
UGamma
72
GAMMA (ugamma)
December 2009
RO / Block
Range
RW Mode
0=Undefined
RW N/A 1=Acknowledged
2=
Unacknowledged
0=Undefined
1=Clear reported
2=Clear not reported
RO N/A
3=Active reported
4=Active not reported
RO N/A
RO N/A
RO N/A
0=Undefined
RW N/A 1=Acknowledged
2=
Unacknowledged
0=Undefined
1=Clear reported
RO N/A 2=Clear not reported
3=Active reported
4=Active not reported
RO N/A
RO N/A
RO N/A
Extended Parameters
ALL OUT_SCALE +/− 10%
RO N/A
RO N/A
ALL Positive
0=Standard
OOS
1=Series
0=PID terms on error
1=PI terms on error, D term
on PV
2=I terms on error, PD term
on PV
3=PD terms on error
OOS
4= P term on error, D term
on PV
5=ID terms on error
6=I term on error, D term
on PV
7=2 Deg. of Freedom PID
OOS > = 0, < = 1
−Continued−
PID Function Block
Initial Value Description
0=undefined
Data Type: DS-71
The DV HI alarm data, which includes a value of
the alarm, a timestamp of occurrence, and the
state of the alarm.
0=undefined
VALUE Data Type: Float
0
0
0
0=undefined
Data Type: DS-71
The DV LO alarm data, which includes a value of
the alarm, a timestamp of occurrence, and the
state of the alarm.
0=undefined
VALUE Data Type: Float
0
0
0
Data Type: Float
0 The bias value used to calculate output for a PD
structure.
Data Type: Float
The error (SP−PV) used to determine the control
Dynamic
action.
Data Type: Float
Dynamic The working set point of the block after limiting
and filtering is applied. EU of PV_SCALE
Data Type: Float
The time constant of the first-order SP filter. It is
0 the time, in seconds, required for a 63 percent
change in the IN value. Applied after SP rate
limiting.
Data Type: Unsigned8
0=Standard
Selects equation form (series or standard)
Data Type: Unsigned8
0=PID terms
Defines PID equation structure to apply controller
on error
action.
Data Type: Float
Fraction of derivative action taken on error
versus PV. For a value of 0.6, then 60% of the
derivative action will be based on error and 40%
1.0 on PV. The value of GAMMA may be changed
over a range of 0−1 if STRUCTURE is set to Two
Degrees of Freedom Control. Otherwise, it is
automatically set to a value of 1 or 0 based on
the Structure selection.
4
4-95