User Manual
EM303B General Purpose Inverter
144
monocycle running time is up, pressing
STOP
RESET
, external terminal stop, coast-to-stop command,
and fault, the terminal shall be off first and on again later, and then the inverter can be started.
F9-25=1
Inverter will run directly.
If the start/stop control mode is in 2-wire sequence and the terminal is ready, inverter will run
directly. (Do not need to confirm the status of F9-25, inverter can be started directly.)
8.11.12
Auxiliary Function
No.
Function
Range
Unit Default Type
F9-16
Cut-off Frequency of Oscillation
Suppression
20~400
%
90
〇
F9-27
Oscillation Suppression Gain
0
~
20000
300
●
F9-27 sets function of oscillation suppression gain. It enable
s
motor to lower the oscillation
degree when oscillation happens. (Enabled in open-loop V/F mode)
Speed Search
8.11.13
Speed Search
No.
Function
Range
Unit Default Type
F9-28
Speed Search Mode
of Software
0: Maximum frequency
1: Stop frequency
2: Setting frequency
0
〇
F9-28=0 Maximum frequency
When inverter starts speed search, it will start from the maximum frequency.
F9-28=1 Stop frequency
When inverter starts speed search, it will start from the frequency when inverter stops.
F9-28=2 Setting frequency
When inverter starts speed search, it will start from50Hz.
No.
Function
Range
Unit
Default
Type
F9-26
Voltage Resume Time of Speed Search
0.00
~
5.00
S
0.30
●
When F9-28=2, inverter will start speed search from the setting frequency of F9-26
No.
Function
Range
Unit Default Type
F9-18
Speed Search Current
0.30
~
1.50
0.60
〇
Speed search current is the ratio relative to the inverter rated current. The smaller the current
is, the smaller impact to the motor is, and the accuracy of speed search is high. But if the
setting value is too small, it may cause inaccurate speed search result and start failure. The
larger the current is, the motor speed will not drop too much. Please increase the setting value
of F9-18 when speed search on heavy load.
No.
Function
Range
Unit Default Type
F9-19
Speed Search Coefficient
1.00
~
1.30
1.05
〇
Generally, speed search coefficient can take default. When searching speed is too fast and
overvoltage fault occurs, please try to increase the setting value of F9-19.