User Manual of EM730/EM730E Series Inverter
143
The rotation direction of the motor can be changed by modifying this function code instead
of motor wiring. This is equivalent to the change in the rotation direction of the motor by
adjusting any two wires of the motor (U, V, W).
1
．
After the parameters are initialized, the rotation direction of the motor will return to
its original status.
2
．
Be careful to conduct the aforesaid operation where it is forbidden to
change the rotation direction of the motor after system debugging.
3
．
When the inverter is prohibited from reverse running (e.g. F00.21=1), this
function is invalid.
Function code
Function code
name
Parameter description
Unit
Default
setting
Attribute
F00.21
Reverse control
0: Allow forward/reverse
running
1: Prohibit reversing
0
〇
F00.22
Duration of
forward and
reverse dead zone
0.00
～
650.00
s
0.00
●
F00.21=0: reversing running is allowed.
The rotation direction of the motor is controlled by the setting of the F/R terminal or
F00.20.
F00.21=1: reverse running is prohibited.
The motor can only work in one direction, and the F/R terminal and F00.20 are invalid.
Select the forward/reverse status of the motor.
If F00.22=0.00 is set, forward and reverse running is subject to smooth transition.
If F00.22≠0 is set, when the speed drops to 0.00Hz during forward and reverse switching,
1. The upper and lower frequency limits should be set carefully according to the nameplate
parameters and operating conditions of the actually controlled motor, and the
motor should be prevented from long-time operation at the low frequency;
otherwise, the motor life may be shortened due to overheat.
2. Relationship of the maximum frequency, upper frequency limit and lower frequency
limit: 0.00Hz≤Fdown≤Fup≤Fmax≤600.00Hz;
3. When the set frequency is lower than F00.19 (lower frequency limit), the running mode
is dependent on F15.33.
Function code
Function code
name
Parameter description
Unit
Default
setting
Attribute
F00.20
Running
direction
0: consistent direction
1: opposite direction
0
●
