VD300 Series Inverter User Manual
Parameter Description
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which if the feedback quantity changes 100%, the adjustment quantity reaches maximum frequency
(P00.07) (proportional and integral functions are neglected). The longer the differential time is, more
powerful the adjustment intensity is.
P08.12
PID Parameter
Switchover Condition
0: No switchover(only use PID
parameter 1)
1: DI terminals
2: According to deviation
auto-switchover
0
○
P08.13
PID Parameter
Switchover Deviation 1
0.0%~100.0%
20.0%
○
P08.14
PID Parameter
Switchover Deviation 2
0.0%~100.0%
80.0%
○
2 set of independent PID control parameters can be set by P08.12 as not-switchover, DI terminal or
automatic-switchover. If you choose to PID parameters automatically switchover, when a given and
feedback error absolute value is less than the PID parameters switchover deviation 1 namely P08.13
set value, the PID control parameters selected PID parameter 1; when a given and feedback error
absolute value is bigger than the PID parameters of deviation 2 namely P08.14 set value, the PID
control parameters selected PID 2; When a given and feedback error absolute value between PID
switchover deviation 1 and PID deviation 2, PID control parameters is linear interpolation of two
groups of PID control parameters values. As shown in the figure below:
Fig 6.8-2 Schematic diagram for PID parameters automatically switchover
P08.15
PID Deviation Limit
0.0%~100.0%
0.0%
○
When the deviation of PID command and feedback is smaller than function code set value, PID
regulator stop regulation, PID output maintains with no change, for some application it can increase
PID regulator stability.
The corresponding relation of deviation limit and output frequency is show in the below diagram:
Summary of Contents for VD300 Series
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