INVT Goodrive20-EU VFD Series Operation Manual page 88

Goodrive20-EU series VFD
Function
Name
code
PID output
P09.03
feature
High frequency
P09.04 proportional
gain (Kp)
High frequency
P09.05 integral time
(Ti)
High frequency
P09.06 differential time
(Td)
Detailed instruction of parameters
Note: The reference channel and the feedback
channel cannot coincide; otherwise, PID cannot
control effectively.
0: PID output is positive: when the feedback
signal exceeds the PID reference value, the
output frequency of the VFD will decrease to
balance the PID. For example, the strain PID
control during wrap-up
1: PID output is negative: When the feedback
signal is stronger than the PID reference value,
the output frequency of the VFD will increase to
balance the PID. For example, the strain PID
control during wrap down
The function is applied to the proportional gain P
of PID input.
P determines the strength of the whole PID
adjuster. The parameter of 100 means that when
the offset of PID feedback and given value is
100%, the adjusting range of PID adjustor is the
max. frequency (ignoring integral function and
differential function).
Setting range: 0.00 – 100.00
This parameter determines the speed of PID
adjustor to carry out integral adjustment on the
deviation of PID feedback and reference.
When the deviation of PID feedback and
reference is 100%, the integral adjustor works
continuously after the time (ignoring the
proportional effect and differential effect) to
achieve the max. frequency (P00.03) or the max.
voltage (P04.31). Shorter the integral time,
stronger is the adjustment
Setting range: 0.00 – 10.00s
This parameter determines the strength of the
change ratio when PID adjustor carries out
integral adjustment on the deviation of PID
feedback and reference.
84
Function parameters
Default
Modify
value
○
0
○
1.00
○
0.10s
○
0.00s