Mitsubishi Electric FR-A820-00046 Instruction Manual page 696

Fr-a800 series
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(A) Application parameters
Operation
● Procedure for operation
Setting the parameters
Start inverter operation
Constant-speed commercial
power supply operation
Fig. 5-229:
● Signal operation after setting parameters
Status
Power ON
At start
(Inverter)
During constant-
speed operation
(commercial power
supply)
For deceleration,
switched to the
inverter operation
(inverter)
Stop
Tab. 5-205: Signals after parameter setting
5 - 494
Power supply ON
Deceleration (stop)
inverter operation
Operation procedure
MRS
CS
OFF
OFF
(OFF)
(OFF)
OFF → ON OFF → ON OFF → ON
ON → OFF
ON
ON
OFF→ ON
ON
ON
Pr. 135 = "1" (open collector output terminal of inverter)
Pr. 136 = "2.0 s"
Pr. 137 = "1.0 s" (Set the time until MC3 is actually turned ON and the
inverter and motor are electrically connected. If the time is short, the
restart may not function properly.)
Pr. 57 = "0.5 s"
Pr. 58 = "0.5 s" (Always set this to switchover from the commercial power
supply operation to the inverter operation.)
STF
MC1
OFF → ON
OFF
(OFF → ON)
(OFF)
ON
OFF → ON ON → OFF
ON
ON
ON → OFF OFF → ON
ON
ON
ON → OFF
ON
MC2
MC3
Remarks
External operation
OFF → ON
OFF
mode
(OFF → ON)
(OFF)
(PU operation mode)
OFF
ON
MC2 turns ON after MC3
turns OFF.
Waiting time is 2 s (while
coasting).
MC3 turns ON after MC2
turns OFF.
Waiting time is 4 s (while
coasting).
OFF
ON
Parameters
I002672E

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