Mitsubishi Electric FR-A700 EC, Инструкция по эксплуатации

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Parameter Special operation
FR-A700 EC 6 - 507
●
Operation sequence example when there is automatic switchover sequence (Pr. 139
≠
9999,
Pr. 159
≠
9999)
Operation procedure
Turn the power supply on.
Set the parameters.
Pr. 135 = 1 (Commercial power supply operation enabled.)
Pr. 136 = 2.0s
Pr. 137 = 1.0s (Set the time longer than the time from when MC3 actually turns on until the
inverter and motor are connected. If the time is short, a restart may not function properly.)
Pr. 57 = 0.5s
Pr. 58 = 0.5s (Be sure to set this parameter when commercial power supply operation is
switched to inverter operation.)
Start inverter operation.
The switchover to commercial power supply operation is performed by a command or when
the switchover frequency is reached.
When the Stop command is applied the system switches to inverter operation and the motor
is decelerated under control.
I001241E
Fig. 6-251: Signal timing when there is automatic switchover sequence
STF
Output frequency
Frequency command
Inverter operation
MC3
Commercial power-
supply operation
MC2
A: Pr. 136: MC switchover interlock time
B: Pr. 137: Start waiting time
C: Pr. 57:
Restart coasting time
D: Pr. 58: Restart cushion time
Time
Time
Actual motor
speed