ABB ACS355 User Manual page 263

All parameters
No. Name/Value
4003 DERIVATION
TIME
0.0...10.0 s
4004 PID DERIV
FILTER
0.0...10.0 s
4005 ERROR
VALUE INV
NO
YES
4006 UNITS
0...68
4007 UNIT SCALE
Description
Defines the derivation time for the process PID controller.
Derivative action boosts the controller output if the error
value changes. The longer the derivation time, the more the
speed controller output is boosted during the change. If the
derivation time is set to zero, the controller works as a PI
controller, otherwise as a PID controller.
The derivation makes the control more responsive for
disturbances.
The derivative is filtered with a 1-pole filter. Filter time
constant is defined by parameter
Error
100%
0%
PID output
Gain
4001
Derivation time. If parameter value is set to zero, the
derivative part of the PID controller is disabled.
Defines the filter time constant for the derivative part of the
process PID controller. Increasing the filter time smooths
the derivative and reduces noise.
Filter time constant. If parameter value is set to zero, the
derivative filter is disabled.
Selects the relationship between the feedback signal and
drive speed.
Normal: A decrease in feedback signal increases drive
speed. Error = Reference - Feedback
Inverted: A decrease in feedback signal decreases drive
speed. Error = Feedback - Reference
Selects the unit for PID controller actual values.
See parameter 3405 OUTPUT1 UNIT
given range.
Defines the decimal point location for PID controller actual
values.
Actual signals and parameters 263
4004 PID DERIV
Process error value
t
D-part of controller output
t
4003
selections in the
Def/FbEq
0.0 s
FILTER.
1 = 0.1 s
1.0 s
1 = 0.1 s
NO
0
1
%
1