Application parameter group 10
PARAMETER DESCRIPTION 263
2.
With action sequence for the automatic switch-over sequence(10-31(
P.249
) ≠ 99999, 10-32(
P.250
) = 99999).
time
A
A
B
C
D
time
MC2
MC1
STF
10-31
（
P.249
）
Setting
frequency
Output
frequency
Actual
motor
speed
3.
With action sequence for the automatic switch-over sequence series (10-31(P.249)≠ 99999, 10-32(P.250) ≠99999)
STF
time
A
A
B
C
D
A
A
B
C D
time
10-31
（
P.249
）
10-32(P.250)
MC2
MC1
Setting
frequency
Output
frequency
Actual motor
speed
During the automatic switch-over, A: 10-29(P.247) MC switch-over interlocking time; B: 10-30(P.248) starting
waiting time; C: 10-09(P.57) restarting free operation time; D: 10-10(P.58) restarting elevating time.
Note: 1. When the motor runs at 50Hz (or 60Hz), the commercial power supply will offer a more efficient operation than
the inverter will. Moreover, during the inverter maintenance/inspection period, the commercial power supply
circuit should be installed to prevent the motor from being stopped for too long.
2. To prevent the inverter from setting off the over-current alarm when changing between the inverter operation
and the commercial power supply operation, the interlock measure has to be taken. Once the motor stops, it will
be activated via the inverter. switch-over and interlock can be carried out through the inverter and a complicated
commercial power supply if commercial power supply switch-over sequence function that can send out the
signal for electromagnetic contactor actions is used.
3. This function is only valid under the V/F mode 00-21(P.300)=0.
