Fisher FIELDVUEDVC6200f Instruction Manual page 232

DVC6200f Digital Valve Controller
PID Function Block
February 2017
Table E‐6. PID Function Block System Parameters Definitions
Label
PARAMETER_NAME
Setpoint Rate Down
SP_RATE_DN
Setpoint Rate UP
SP_RATE_UP
Setpoint High Limit
SP_HI_LIM
Setpoint Low Limit
SP_LO_LIM
Gain
GAIN
Reset
RESET
Balance Time
BAL_TIME
Rate
RATE
Back Calculation Input
BKCAL_IN
Output High Limit
OUT_HI_LIM
Output Low Limit
OUT_LO_LIM
Back Calculation Hysteresis
BKCAL_HYS
Back Calculation Output
BKCAL_OUT
Remote Cascade Input
RCAS_IN
Remote Out Input
ROUT_IN
232
Index RO / Block
Number RW Mode
19 ALL Positive
20 ALL Positive
PV Scale +/- 10%, must be
21 ALL
greater than SP_LO_LIM
PV Scale
22 ALL +/- 10%, must be less than
SP_HI_LIM
23 ALL greater than 0
24 ALL Positive
25 ALL Positive
26 ALL Positive
Status
27 ALL
Value
28 ALL OUT_SCALE +/- 10%
29 ALL OUT_SCALE +/- 10%
30 ALL 0 to 50%
31 RO N/A
Status
32 ALL
Value
Status
33 ALL
Value
Range Initial Value
+ INF
+ INF
100
0
1
+ INF
0
0
BAD
Not Connected
Not Limited
0
100
0
0.50%
Dynamic
BAD
Not Connected
Not Limited
0 Trk
BAD
Not Connected
Not Limited
0 Trk
Instruction Manual
D103412X012
Description
Data Type: Float
Ramp rate for downward SP changes. When the
ramp rate is set to zero, the SP is used
immediately. PV per second
Data Type: Float
Ramp rate for upward SP changes. When the ramp
rate is set to zero, the SP is used immediately. PV
per second
Data Type: Float
The highest SP value allowed.
Data Type: Float
The lowest SP value allowed.
Data Type: Float
The proportional gain value.
Data Type: Float
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
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
The derivative action time constant, in seconds.
Data Type: DS‐65
The analog input value and status from another
block's BKCAL_OUT output that is used for
backward output tracking for bumpless transfer
and to pass limit status.
Data Type: Float
Limits the maximum output value for modes other
than manual.
Data Type: Float
Limits the minimum output value for modes other
than manual.
Data Type: Float
The amount the output value must change away
from the its output limit before limit status is
turned off.
Data Type: DS‐65
The value and status required by the BKCAL_IN
input of another block to prevent reset windup and
to provide bumpless transfer of closed loop
control.
Data Type: DS‐65
Target setpoint and status that is provided by a
supervisory host. Used when mode is RCAS.
Data Type: DS‐65
Target output and status that is provided by a
supervisory host. Used when mode is ROUT.