ACS 160 User’s Manual
87
Group 40: PID Control
The PID Control Macro allows the ACS 160 to take a reference signal (setpoint) and an actual signal
(feedback), and automatically adjust the speed of the drive to match the actual signal to the
reference.
There exist two PID parameter sets (group 40 for set 1 parameters and group 41 for set 2
parameters). Normally only set 1 parameters are used. Set 2 parameters can be taken in use by
parameter 4016
PID
PARAM
SET
. Selection between parameter sets can be done eg. through a digital
input.
PID sleep function can be used to stop the regulation when the output of the PID controller falls
below preset limit. Regulation is resumed when the process actual value falls below preset limit.
Alternatively, sleep function can be activated and deactivated through a digital input.
Figure 31 (Appendix A) shows the connections of internal signals when the PID Control macro is
selected.
Code Description
4001
PID GAIN
This parameter defines the gain of the PID Controller. The setting range is 0.1... 100.
If you select 1, a 10 % change in error value causes the PID Controller output to change by 10 %.
4002
PID INTEG TIME
PID controller integration time. Defined as the time in which the maximum output is achieved if a constant
error value exists and the gain is 1. Integration time 1 s denotes that a 100 % change is achieved in 1 s.
PID integration time
Gain
Gain
t
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