INVT GD270-090-4 - Page 194

Goodrive270 series VFD for fan and pump Function parameter list
-184-
Function
code
Name Description Default
Modify
(ignoring proportional and integral function) is the
max. output frequency (
P00.03) or the max.
voltage (
P04.31). Longer differential time
indicates stronger adjustment.
Setting range: 0.00±10.00s
P09.07 Sampling cycle (T)
Used to indicate the sampling cycle of feedback.
The regulator calculates in each sampling cycle.
A longer sampling cycle indicates slower
response.
Setting range: 0.001±10.000s
0.001s ƻ
P09.08
PID control deviation
limit
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 st
ability of the PID system.
Reference
Deviation
limit
Feedback
Output
frequency f
Time t
Time t
Setting range: 0.0±100.0%
0.0% ƻ
P09.09
PID output upper
limit
The function codes are used to set the upper and
lower limits of PID regulator output values.
100.0% corresponds to the max. output
frequency (
P00.03) or max. voltage (P04.31).
P09.09
setting range: P09.10±100.0%
P09.10 setting range: -100.0%±P09.09
100.0% ƻ
P09.10
PID output lower
limit
0.0% ƻ