Emerson Fisher Fieldvue DVC6030f Instruction Manual page 155

Table 5-31. PID Function Block System Parameters Definitions (Continued)
Label Index
PARAMETER_NAME Number
Shed Options
34
SHED_OPT
Remote Cascade Output
35
RCAS_OUT
Remote Out Output
36
ROUT_OUT
Tracking Scale
37
TRK_SCALE
Tracking Input Discrete
38
TRK_IN_D
Tracking Value
39
TRK_VAL
Feed Forward Value
40
FF_VAL
Feed Forward Scale
41
FF_SCALE
Feed Forward Gain
42
FF_GAIN
March 2006
RO / Block
Range
RW Mode
0=Invalid
1=Normal Shed, Normal
Return
2=Normal Shed, No Return
3=Shed to Auto, normal
return
4=Shed to Auto, no return.
Target mode changes to
Auto on detection of a shed
condition
5=Shed to Manual, normal
ALL
return
6=Shed to Manual, No
return. Target mode
changes to MAN on
detection of a shed
condition.
7=Shed to retained target,
normal return
8=Shed to retained target,
no return. (Change target
to retained target)
RO N/A
RO N/A
MAN
OOS
Status
ALL
Value
Status
ALL
Value
Status
ALL
Value
MAN
OOS
MAN
OOS
−Continued−
PID Function Block
Initial Value Description
Data Type: Uint8
Defines action to be taken on remote control
device timeout.
Normal Return − actual mode changes to the
next lowest priority non−remote mode permitted
0=Invalid but returns to the target remote mode when the
remote computer completes the initialization
handshake.
No Return − Target mode changes to the next
lowest priority non−remote mode permitted. The
target remote mode is lost, so no return occurs.
Data Type: DS-65
Block setpoint and status after ramping, filtering,
and limiting that is provided to a supervisory host
Dynamic
for back calculation to allow action to be taken
under limiting conditions or mode change. Used
when mode is RCAS.
Data Type: DS-65
Block output that is provided to a supervisory
host for a back calculation to allow action to be
Dynamic
taken under limiting conditions or mode change.
Used when mode is RCAS.
Data Type: DS-68
100
The high and low scale values, engineering units
0
code, and number of digits to the right of the
%
decimal point associated with the external
2
tracking value (TRK_VAL).
BAD:
Data Type: DS-66
NC:
Discrete input that initiates external tracking of
const
the block output to the value specified by
TRK_VAL.
0
BAD:
Data Type: DS-65
NC:
The value (after scaling from TRK_SCALE to
const
OUT_SCALE) applied to OUT in LO mode when
0 external tracking is enabled by TRK_IN_D.
BAD:
NC:
Data Type: DS-65
const
The feedforward control input value and status.
0
Data Type: DS-68
100
The high and low scale values, engineering units
0
code, and number of digits to the right of the
%
decimal point associated with the feedforward
2
value (FF_VAL).
Data Type: Float
The feedforward gain value. FF_VAL is multiplied
0
by FF_GAIN before it is added to the calculated
control output. A value of 0 disables feedforward.
5
5-89