Emerson Fisher FIELDVUE DVC6000f Instruction Manual page 151

Table 4-31. PID Function Block System Parameters Definitions (Continued)
Label Index
PARAMETER_NAME Number
Gain
23
GAIN
Reset
24
RESET
Balance Time
25
BAL_TIME
Rate
26
RATE
Back Calculation Input
27
BKCAL_IN
Output High Limit
28
OUT_HI_LIM
Output Low Limit
29
OUT_LO_LIM
Back Calculation Hysteresis
30
BKCAL_HYS
Back Calculation Output
31
BKCAL_OUT
Remote Cascade Input
32
RCAS_IN
Remote Out Input
33
ROUT_IN
December 2009
RO / Block
Range
RW Mode
ALL greater than 0
ALL Positive
ALL Positive
ALL Positive
Status
ALL
Value
ALL OUT_SCALE +/− 10%
ALL OUT_SCALE +/− 10%
ALL 0 to 50%
RO N/A
Status
ALL
Value
Status
ALL
Value
−Continued−
PID Function Block
Initial Value Description
Data Type: Float
1
The proportional gain value.
Data Type: Float
+ INF The integral action time constant. Seconds per
repeat
Data Type: Float
The specified time, in seconds, for the internal
working value of bias to return to the operator set
0 bias. Also used to specify the time constant at
which the integral term will move to obtain
balance when the output is limited and the mode
is AUTO, CAS, or RCAS.
Data Type: Float
0
The derivative action time constant, in seconds.
Data Type: DS-65
BAD: The analog input value and status from another
NC: block's BKCAL_OUT output that is used for
backward output tracking for bumpless transfer
const
and to pass limit status.
0
Data Type: Float
100 Limits the maximum output value for modes other
than manual.
Data Type: Float
0 Limits the minimum output value for modes other
than manual.
Data Type: Float
The amount the output value must change away
0.50%
from the its output limit before limit status is
turned off.
Data Type: DS-65
The value and status required by the BKCAL_IN
Dynamic input of another block to prevent reset windup
and to provide bumpless transfer of closed loop
control.
BAD:
NoCom:
Data Type: DS-65
NoVal:
Target setpoint and status that is provided by a
const
supervisory host. Used when mode is RCAS.
0 Trk
BAD:
NoCom:
Data Type: DS-65
NoVal:
Target output and status that is provided by a
const
supervisory host. Used when mode is ROUT.
0 Trk
4
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