INVT Goodrive3000 GD3000-01-055G-12 Operation Manual page 118

Goodrive3000 series medium voltage inverters
the inverter will decrease to balance PID. For example, rewind the strain PID control.
1: PID output is negative. When the feedback signal exceeds the PID reference, the output frequency of
the inverter will increase to balance PID. For example, unwind the strain PID control.
Function
Name
code
Proportional gain
P09.04
(Kp)
The function is applicable to the proportional gain P of PID input.
P determines the strength of the whole PID adjuster. Larger P, stronger the adjustment. The parameter of
100 means that when the offset of PID feedback and reference value is 100%, the adjusting range of PID
adjuster is the maximum frequency (ignoring integral and differential function).
Function
Name
code
P09.05 Integral time(Ti)
This parameter determines the speed of the integral adjustment on the deviation of PID feedback and
reference from PID adjuster.
When the deviation of PID feedback and reference is 100%, the integral adjuster works continuously
during the time (ignoring proportional and differential function) to achieve the maximum output frequency
(P00.03) or the maximum voltage (P04.31). Shorter the integral time, stronger the adjustment.
Function
Name
code
P09.06 Differential time(Td) 0.00~10.00s
This parameter determines the strength of the change ratio adjustment on the deviation of PID feedback
and reference from PID adjuster.
If the PID feedback changes 100% during the time, the adjustment of integral adjuster (ignoring
proportional and integral function) is the maximum output frequency (P00.03) or the maximum voltage
(P04.31). Longer the differential time, stronger the adjustment.
Function
Name
code
P09.07 Sampling cycle (T)
This parameter means the sampling cycle of the feedback. The adjuster calculates in each sampling
cycle. The longer the sampling cycle is, the slower the response is.
Function
Name
code
PID control
P09.08
deviation limit
The output of PID system is relative to the maximum deviation of the close loop reference. As shown in
the diagram below, PID adjuster stops regulating in the range of deviation limit. Set the function code
properly to adjust the accuracy and stability of PID system.
Detailed instruction of parameters
0.00~100.00
Detailed instruction of parameters
0.00~10.00s
Detailed instruction of parameters
Detailed instruction of parameters
0.001~10.000s
Detailed instruction of parameters
0.0~100.0%
-117-
Goodrive3000 series converter
Default
Setting range
value
0.00~100.00
Default
Setting range
value
0.00~10.00 0.10s
Default
Setting range
value
0.00~10.00 0.00s
Default
Setting range
value
0.001~10.000 0.100s
Default
Setting range
value
0.0~100.0 0.0%
1.00