ABB JDF300 Operating Instruction page 30

30 J D F 3 0 0 | F I E L D I N D I C ATO R | O I/ J D F 3 0 0 - E N R E V. B
. . .Block Mapping
Idx Parameter
17 BYPASS
18 CAS_IN
19 SP_RATE_DN
20 SP_RATE_UP
21 SP_HI_LIM
22 SP_LO_LIM
23 GAIN
24 RESET
25 BAL_TIME
26 RATE
27 BKCAL_IN
28 OUT_HI_LIM
29 OUT_LO_LIM
30 BCAL_HYS
31 BKCAL_OUT
32 RCAS_IN
33 ROUT_IN
34 SHED_OPT
35 RCAS_OUT
36 ROUT_OUT
37 TRK_SCALE
38 TRK_IN_D
39 TRK_VAL
40 FF_VAL
41 FF_SCALE
42 FF_GAIN
Description / Range / Selections / Notes
The normal control algorithm may be bypassed trough this parameter. When bypass is set, the set point value (in
percent) will be directly transferred to the output.
1 OFF
2 ON
Remote set point value from another block. Expressed in PV_SCALE Unit Code
Ramp rate at which downward setpoint changes are acted on in Auto mode, in PV
units per second. If the ramp rate is set to zero, then the setpoint will be used
0 or > 0
immediately. For control blocks, rate limiting will apply only in Auto.
Expressed in PV_SCALE Unit
Ramp rate at which upward setpoint changes are acted on in Auto mode, in PV units
per seconds
per second. If the ramp rate is set to zero, then the setpoint will be used immediately.
For control blocks, rate limiting will apply only in Auto.
The setpoint high limit is the highest setpoint operator entry that can be used for the
Acceptable value:
block.
PV_SCALE +/- 10%
The setpoint low limit is the lowest setpoint operator entry that can be used for the
Expressed in PV_SCALE Unit
block.
0 or > 0 The proportional gain value.
0 or > 0 The integral time constant, expressed in seconds per repeat
The specified time for the internal working value of bias to return to operator set
bias.
0 or > 0 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. Expressed in
seconds
0 or > 0 The derivative action time constant expressed in seconds
The analog input value from another block's BKCAL_OUT output that is used to prevent reset windup and to
initialize the control loop. Expressed in OUT_SCALE Unit Code
Acceptable value: Limits the maximum output value.
OUT_SCALE +/- 10%
Limits the minimum output value.
Expressed in OUT_SCALE Unit
0 to 50% [Default = 0.5%]
Expressed as percent of the OUT_SCALE span
Expressed in PV_SCALE Unit
Expressed in PV_SCALE Unit
Used when mode is RCAS
Expressed in OUT_SCALE Unit
Used when the mode is ROUT.
Define actions to be taken on remote control device timeout
Expressed in PV_SCALE Unit.
Used when mode is RCAS.
Expressed in OUT_SCALE Unit.
Used when mode is ROUT.
The high and low scale values, engineering units code, and number of digits to the right of the decimal point,
associated with TRK_VAL.
This discrete input is used to initiate external tracking of the block output to the value specified by TRK_VAL.
Expressed in TRK_SCALE Unit.
Expressed in FF_SCALE Unit.
The high and low scale values, engineering units code, and number of digits to the right of the decimal point
associated with FF_VAL
The gain that the feed forward inpt is multiplied by before it is added to the calculated control output.
The amount that the output must change away from its
output limit before the limit status is turned off,
The value and status required by an upper block's
BKCAL_IN so that the upper block may prevent reset
windup and provide bumpless transfer to closed loop
control.
Target setpoint value provided by a supervisory host.
Target output value provided by a supervisory host
Block setpoint Value after ramping – provided by a
supervisory host for back calculations and to allow
action to be taken under limiting conditions or mode
change
Block output Value provided to a supervisory host for a
back calculation to allow action to be taken under
limiting conditions or mode change
This input is used as the track value when external
tracking is enabled by TRK_IN_D.
The feed forward value and status