INVT Goodrive3000 Series Operation Manual page 115

Goodrive3000 series medium voltage VFD
0: PID output is positive. When the feedback signal is greater than the PID reference value, the output frequency of the
VFD will decrease to balance the PID. Example: PID control on strain during unwinding.
1: PID output is negative. When the feedback signal is greater than the PID reference value, the output frequency of the
VFD will increase to balance the PID. Example: PID control on strain during unwinding.
Function
code
P09.04 Proportional gain (Kp) 0.00–100.0
The function is applied to the proportional gain P of PID input.
P determines the strength of the whole PID adjuster. The value 100 indicates that when the difference between the PID
feedback value and given value is 100%, the range within which the PID regulator can regulate the output frequency
command is the max. frequency (ignoring integral function and differential function).
Function
code
P09.05
The function is used to determine the speed of the integral adjustment on the deviation of PID feedback and reference
from the PID regulator.
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 max. output frequency (P00.03) or the max. voltage
(P04.31). Shorter integral time indicates stronger adjustment.
Function
code
P09.06 Differential time (Td) 0.00–10.00s
The function is used to determine the strength of the change ratio adjustment on the deviation of PID feedback and
reference from the PID regulator.
If the PID feedback changes 100% during the time, the adjustment of the differential regulator (ignoring proportional and
integral function) is the max. output frequency (P00.03) or the max. voltage (P04.31). Longer differential time indicates
stronger adjustment.
Function
code
P09.07 Sampling cycle (T) 0.001–10.000s
The function is used to indicate the sampling cycle of feedback. The regulator calculates in each sampling cycle. A longer
sampling cycle indicates slower response.
Function
code
PID control deviation
P09.08
The output of the PID system is relative to the max. deviation of the closed loop reference. As shown in the following figure,
the PID regulator stops regulating in the range of deviation limit. Set the function parameter properly to adjust the
accuracy and stability of the PID system.
Name
Name
Integral time (Ti) 0.00–10.00s
Name
Name
Name
0.0–100.0%
limit
Description
Description
Description
Description
Description
-109-
Goodrive3000 inverter
Setting range Default
0.00–100.0 1.00
Setting range Default
0.00–10.00 0.10s
Setting range Default
0.00–10.00 0.00s
Setting range Default
0.001–10.000 0.100s
Setting range Default
0.0–100.0 0.0%