User Manual of A90 Series Inverter
128
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
○
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, the inverter will work at 0.00Hz within the duration of the forward and reverse
dead zone (F00.22) and then in the opposite direction to the set frequency. See Fig. 7-5.
Function code
Function code
name
Parameter description
Unit
Default
setting
Attribute
F00.20
Running
direction
0: consistent direction
1: opposite direction
0
●
