Fisher FIELDVUEDVC6200f Instruction Manual page 237

Instruction Manual
D103412X012
Table E‐6. PID Function Block System Parameters Definitions
Label
PARAMETER_NAME
Structureconfig
STRUCTURECONFIG
UGamma
GAMMA (ugamma)
UBeta
BETA (ubeta)
IDeadBand
IDEADBAND
StdDev
STDDEV
Cap StdDev
CAP_STDDEV
T Request
T_REQUEST
T State
T_STATE
T Status
T_STATUS
Index RO / Block
Number RW Mode
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
71 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
72 OOS > = 0, < = 1
73 OOS > = 0, < = 1
74 OOS Positive
75 RO N/A
76 RO N/A
0=Request Tuning
77 RO ALL 1=Force Tuning
2=Reset Tuner
78 RO NONE
0=Scan Rate Too Low
Warning
1=Insufficient Process
Response (obsolete)
2=Scan Rate Too High
Warning
3=Inverse Direct Acting
Error
4=PV Deviation Too Large
5=Initial PV Deviation Too
Large
79 RO N/A
6=PV Limited or Constant
7=PV Bad
8=Invalid Mode for Tuning
9=BKCAL_IN Non Good or
Limited
10=Out Limited
11=Bypass Active
12=Mode Changed
13=Tracking Active
14=Disconnected
15=SP Changed
Range Initial Value
1=PI terms on
error, D term
on PV
1.0
1
0
Dynamic
Dynamic
All bits: 0
0
0=Scan Rate
Too Low
Warning
DVC6200f Digital Valve Controller
PID Function Block
Description
Data Type: Unsigned8
Defines PID equation structure to apply controller
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% 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.
Data Type: Float
Fraction of proportional action taken on error
versus PV. For a value of 0.6, then 60% of the
proportional action will be based on error and 40%
on PV. The value of BETA 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.
Data Type: Float
Integral action stops when ERROR is within
IDEADBAND, proportional and derivative action
continue. EU of PV_SCALE
Data Type: Float
Standard deviation of PV.
Data Type: Float
Standard deviation of PV changes.
Data Type: Bit String
Operator request to initiate/control autotuning.
Data Type: Unsigned8
Current autotuner state.
Data Type: Bit String
Autotuner status.
February 2017
237