EasyDrive CV3100 Series Instruction Manual page 114

CV3100 series and MINI series high performance general purpose inverter instruction manual
The parameters of PID controller should be set according to the system properties and
the actual situation.
Proportion gain P: Decide the whole PID controller adjustment intension, The larger
P keeps , the stronger the adjustment intension gets.
Integral time Ti : Decide the speed(quick or slow) ,to which PID controller integral
adjust the deviation between PID feedback quantity and specified quantity
Differential coefficient time Td: Decide the intension, to which PID controller adjusts
the variation rate of deviation between PID feedback quantity and specified quantity,
lies on the differential coefficient time.
Note：If P6.08=0.0, the function of differential coefficient is invalid.
P6.09 Sampling time T
Setting range
The sampling period is of the feedback quantity, adjust PID once every sampling
period, the longer the sampling period goes by, the slower the response gets, but
the suppression effect to disturbance signal is better, so setting is done according to the
concrete situation.
Note：If P6.09=0.00, sampling finishes automatically.
P6.10 Deviation margin
Setting range
The deviation margin refers the ratio between deviation absolute value of feedback
quantity and specified quantity and basic value 10v. When the ratio value is lower than
the setting parameter value, PID adjustment will not be done.
This function is used for the system without high control accuracy but with avoiding
frequent adjustment,the correct setting of this function is good for improving the
stability of system .
0.00—10.00s
0.0—20.0%
6-46
Factory setting
Factory setting
0.00s
0.0%