116
4. Parameter description
Parameter
Warning:
1. MC1 and MC2 must be mechanical interlock, the running direction of the inverter operation
and the commercial power-supply operation should be consistent.
2. Bypass-inverter switchover function is effective in external mode.
3. So long as the signal “CS” is on, STF or STR is available.
Sequence diagram of switching the commercial power-supply:
1.
Action which no automatical switching in order.
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
2.
Action which automatical switching in order (P.249
≠
9999, P.250=9999).
time
A
A
B
C
D
time
MC2
MC1
STF
P.249
Setting
frequency
Output
frequency
Actual
motor speed