TECO E510s Series - Page 244

4-178
(3) Reduce long-period oscillation
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】：Disable
【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.
 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 "Fb" 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 (PID feedback loss detection level) for the time set in parameter 10-13 (PID
feedback loss detection time). PID feedback loss fault message "Pb" will be displayed on the keypad,
the inverter stops and the fault contact is activated. Refer to figure 4.3.82