YASKAWA VS-616PS5 Series Programming Manual page 21

B5-07 PID Control Offset
Setting Range:
Factory Default:
The PID offset adds a bias to the calculated PID value.
B5-08 PID Control Output Primary Delay Time
Setting Range:
Factory Default:
The output delay time builds in a delay to changes in the calculated PID value, which
can prevent oscillations and improve stability. Use the PID Delay Time when tran-
sients occur in the system and it is undesirable to have the PID respond.
Parameters B5-04 thru B5-08 are preset at the factory to optimum values for most
applications, and hence, do not need to be changed.
When tuning a system, first increase the proportional gain until oscillations occur.
Then, reduce the proportional gain slightly until the oscillations stop. Next, reduce the
integral time slowly until oscillations begin. Then, increase the integral time slowly so
that the oscillations cease. Test the system under all conditions, observe the stability
and verify that the desired operation is generated. Fine tune the proportional and inte-
gral times, along with any other PID parameter as needed.
VS-616PS5 Programming Manual
±100.0%
0.0%
0.00 to 10.00s
0.00s
Section B: Application Parameters
B5 PID Control
A
A
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