TECO A510-2001-H - Page 204

4-150
10-11
PID feedback loss detection selection
Range
【0】:
Invalid
【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
. PID control function provides a closed-loop system control. If the PID feedback is lost,
the inverter output frequency may be increased to the maximum output frequency. So
when the PID control is performed, make sure the PID feedback loss detection is
enabled.
. When 10-11 (PID feedback loss detection option) = 1, and PID feedback value status is
less than the set value of 10-12 (PID feedback loss detection level) and more than the
set time of 10-13 (PID feedback loss detection time), the PID feedback loss warning
message "Pb" will be displayed on the digital operator, and the inverter continues to
operate.
. When 10-11 = 2, the failure message "Fb" of feedback signal loss will be displayed, the
failure contact acts and the inverter stops operation.
. Refer to the figure. 4.3.82 for the operation timing diagram
Figure 4.3.82 PID feedback loss detection
Feedback value
FBL
detection