User Manual of EM730/EM730E Series Inverter
226
code
name
setting
F09.21
PID setting change
time
0.000-30.000
s
0.000
●
The PID setting change time refers to the time required for the setting to change from 0.0%
to 100.0%, similar to the acceleration and deceleration time function. When the PID setting
changes, the actual PID setting will change linearly, thus reducing the impact of sudden changes
on the system. Smoothing is invalid during the initial setting. The setting will change from the
current feedback value during the start.
Function
code
Function code
name
Parameter description
Unit
Default
setting
Attribute
F09.22
PID feedback
filtering time
0.000-30.000
s
0.000
●
F09.23
PID output
filtering time
0.000-30.000
s
0.000
●
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.
Function
code
Function code name
Parameter description
Unit
Default
setting
Attribute
F09.24
Upper limit detection
value of PID feedback
disconnection
0.00-100.00; 100.00 =
invalid feedback
disconnection
%
100.00
●
F09.25
Lower limit detection
value of PID feedback
disconnection
0.00-100.00; 0.00 = invalid
feedback disconnection
%
0.00
●
F09.26
Detection time of PID
feedback disconnection
0.000-30.000
s
0.000
●
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
