4-232 
 
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. 
 
It is recommended to enable to the PID feedback loss when the PID function is used.   
 
PID feedback loss detection 
 
10-11=0: Disable 
 
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 
(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. 
 
Figure 4.4.82 PID feedback loss detection