8
1
1
Parameter Description
Parameter Description
Warning:
1. MC1 and MC2 must be mechanically interlocked; the running direction of the inverter
operation and the commercial power supply operation should be consistent.
2. Use the commercial power operation switchover function under the external operation mode.
3. STF/STR is effective when the CS signal is ON.
Here are some typical sequence diagrams for the switchover of the commercial power supply
frequency:
1. No action sequence for the automatic switchover sequence (P.249=99999).
2. With action sequence for the automatic switchover sequence (P.249 99999, P.250=99999).
3. With action sequence for the automatic switchover sequence series (P.249 99999, P.250 99999).
MRS
STF
CS
MC2
MC1
P.247
P.247
P.248
P.57
P.58
Power supply
Inverter
operation
Free
operation
the commercial
power-supply
operation
stop
The motor speed
Free
operation
Inverter
operation
time
A
A
B C D
time
MC2
MC1
STF
P.249
Setting
frequency
Output
frequency
Actual
motor speed
STF
time
A
A B C D
A
A B C D
time
P.249
P.250
MC2
MC1
Setting
frequency
Output
frequency
Actual
motor speed