Mitsubishi Electric FR-F820-00077 Instruction Manual page 574

(A) Application parameters
NOTES When a start signal is turned OFF while running, MC (RO1 to RO4) turns OFF and the motor decel-
erates.
When a protective function is activated while running, MC (RO1 to RO4) turns OFF and the inverter
output is shut off.
● When using two motors in the alternative direct system (Pr. 579 = "3")
RIO1
RIO2
RO1
RO2
M1
M2
Fig. 5-194:
NOTES 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 run-
ning motors coast to a stop. Although the motor with the longest operating time of the commer-
cial 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.
5 - 402
Pr. 580
Pr. 590
Pr. 125
Commercial
Pr. 584
power
Motor
supply
coasting
operation
Inverter
operation
Pr. 581
Inverter operation
Timing diagram when using two motors (alternative direct system)
Pr. 580
Pr. 581
Pr. 57 + Pr. 58
Motor
coasting
The motor is driven
by inverter after
frequency search.
Pr. 591
Pr. 587
C2(902)
Pr. 575
Pr. 590 Pr. 580
SLEEP SLEEP SLEEP
Pr. 584
Motor
coasting
Inverter operation
The starting motor is
switched from M1 to M2
after SLEEP.
Parameters
Pr. 581
Commercial
power
supply
operation
I003060E