4-181
Output
Before
After
t
To quickly stabilize the PID control, reduce the
integral time (I) and increase the differential time (D)
in case overshoot occurs.
(3) Reduce long-period oscillation
Output
Before
After
t
Adjust the integral time (I) in case of long-periodical
system oscillation.
(4) Reduce short-period oscillation
Output
Before
After
t
Adjusting the differential time (D) and proportional (P)
gain when experiencing short-periodical oscillation.
10-11
PID feedback loss detection selection
Range
【
0
】
:
Disabled
【
1
】
:
Warning
【
2
】
:
Fault
10-12
PID feedback loss detection level
Range
【
0~100
】
%
10-13
PID feedback loss detection time
Range
【
0.0~10.0
】
Sec
The PID control function provides closed-loop system control. In case PID feedback is lost, the inverter output
frequency may be increase to the maximum output frequency.
It is recommended to enable to the PID feedback loss when the PID function is used.
PID feedback loss detection
10-11=0:
Disabled
10-11=1:
Warning
A feedback loss condition is detected when the PID feedback value falls below the value set in parameter 10-12
(PID feedback loss detection level) for the time set in parameter 10-13 (PID feedback loss detection time). PID
feedback loss warning message "Pb" will be displayed on the keypad and the inverter will continue to operate.
10-11=2:
Fault
A feedback loss condition is detected when the PID feedback value falls below the value set in parameter 10-12
