Mitsubishi Electric 800 Series Instruction Manual page 439

• When using two motors in the alternative direct system (Pr.579="3")
RIO1
RIO2
RO1
RO2
Pr.125 Pr.125 Pr.125
Pr.584 Pr.584 Pr.584
M1
M2
NOTE
• When the start signal is turned OFF during operation, the inverter-driven motor is decelerated to stop. The motors under
commercial power supply operation are switched over to inverter-driven operation one at a time and decelerated to stop
after frequency search in order from the longest operation time.
• When a protective function is activated while running, MC (RO1 to RO4) turns OFF and the inverter output is shut off.
• When the MRS signal is turned ON during operation, the inverter output is shut off and the running motors coast to a stop.
Although the motor with the longest operating time of the commercial power supply operation is switched to the inverter
operation after elapse of time set in Pr.591 Auxiliary motor stop detection time, the output shutoff status remains. When
the MRS signal is turned OFF, the inverter-driven operation starts after frequency search.
• If the starting signal is turned ON during deceleration regardless of the Pr.579 setting, the multi-pump operation is
performed again.
438
5. PARAMETERS
5.11 (A) Application parameters
Pr.580 Pr.580 Pr.580 Pr.580 Pr.580 Pr.580
Pr.581 Pr.581 Pr.581
Pr.590 Pr.590 Pr.590
Commercial
power supply
Motor
operation
coasting
Inverter
operation
Pr.581 Pr.581 Pr.581
Pr.591 Pr.591 Pr.591
Pr.587 Pr.587 Pr.587
Inverter operation
Pr.57+Pr.58 Pr.57+Pr.58 Pr.57+Pr.58
Pr.575 Pr.575 Pr.575
Motor
coasting
SLEEP SLEEP SLEEP
The motor is
driven by inverter
Pr.584 Pr.584 Pr.584
after frequency
search.
Pr.902 Pr.902 Pr.902
Pr.581 Pr.581 Pr.581
Pr.590 Pr.590 Pr.590
Pr.580 Pr.580 Pr.580
Commercial
power supply
Motor
operation
coasting
Inverter operation
The starting motor is
switched from M1 to M2
after SLEEP.