User Manual of A90 Series Inverter
206
PID feedback filtering time
PID output filtering time
F09.22 is used to filter the PID feedback. This is helpful to reduce the impact of
interference on the feedback, but will cause the decline of the response performance of the
process closed-loop system.
F09.23 is used to filter the PID output. This is helpful to reduce the sudden changes in
the output frequency of the inverter, but will also cause the decline of the response
performance of the process closed-loop system.
Upper limit detection
value of PID feedback
disconnection
0.00-100.00; 100.00 =
invalid feedback
disconnection
Lower limit detection
value of PID feedback
disconnection
0.00-100.00; 0.00 =
invalid feedback
disconnection
Detection time of PID
feedback disconnection
The function of PID feedback disconnection detection is to prevent galloping caused
by feedback disconnection. Depending on the nature of the feedback sensor, the settings are
different.
If the 0.0% type sensor is fed back at the time of disconnection, the lower limit of PID
feedback disconnection detection (F09.25) needs to be set to an appropriate value. If the
feedback amount is below the F09.25 setting and has been maintained for the PID feedback
disconnection detection time (F09.26), the PID feedback will be regarded disconnected.
When the 100.0% type sensor is fed back at the time of disconnection, the upper limit of
PID feedback disconnection detection (F09.24) needs to be set to an appropriate value. If
the feedback amount is greater than the feedback amount and has been maintained for the
time corresponding to F09.26, the PID feedback will be regarded disconnected.
★
Once the feedback sensor is determined, only the corresponding detection mode
can be applied. The upper limit detection and lower limit detection cannot be
enabled at the same time.
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