Mitsubishi Electric FR-A700 Instruction Manual page 685

Parameter
● Operations of magnetic contactors MC1, MC2 and MC3
Magnetic
Contactor
MC1
MC2
MC3
Tab. 6-172: Operations of magnetic contactors
● The input signals are as indicated below.
Signal
MRS
CS
STF
(STR)
OH
RES
Tab. 6-173: I/O signals
Unless the MRS signal is turned on, neither commercial power supply operation nor inverter
operation can be performed.
The CS signal functions only when the MRS signal is on.
STF (STR) functions only when both the MRS signal and CS signal are on.
The RES signal enables reset input acceptance selection using Pr. 75 "Reset selection/
disconnected PU detection/PU stop selection".
MC1 turns off when an inverter alarm occurs.
MC operation
—: Inverter operation (MC2 is off and MC3 is on)
Commercial power supply operation (MC2 is on and MC3 is off)
No change: The status before the signal turns on or off is held.
● The output signals are as indicated below:
Signal
MC1
MC2
MC3
Tab. 6-174: Output signals
FR-A700 EC
Commercial Power
Installation Place
Between power
supply and inverter
input
Between power
supply and motor
Between inverter
output and motor
Terminal
Function
Used
Operation enable/disa-
MRS
ble selection
Inverter/commercial
CS
switchover
Inverter operation
command
STF (STR)
(Invalid for commercial
operation)
Set "7" to any
External thermal relay
of Pr. 180 to
input
Pr. 189.
Operating status
RES
initialization
Terminal Used
(Pr. 190 to Pr. 196 setting)
17
18
19
During Inverter
Supply Operation Operation
ON
ON
OFF
ON/OFF
ON ..... Commercial-inverter
operation enabled
OFF ... Commercial-inverter
operation disabled
ON ..... Inverter operation
OFF ... Commercial power sup-
ply operation
ON ..... Forward rotation (reverse
rotation)
OFF ... Stop
ON ..... Motor normal
OFF ... Motor abnormal
ON ..... Initialization
OFF ... Normal operation
Description
Control signal output of inverter input side magnetic
contactor MC1
Control signal output of inverter output side magnetic
contactor MC2
Control signal output of commercial power supply operation
magnetic contactor MC3
Special operation
At an Inverter Alarm
Occurrence
OFF
ON
(ON by reset)
OFF
(Can be selected using Pr. 138,
OFF
always OFF when external
thermal relay is on)
ON OFF
MC Operation
MC1
ON
ON
ON
ON
ON
ON
ON
ON
No
change
ON
MC2 MC3
— —
No
OFF
change
OFF ON
ON OFF
OFF ON
OFF ON
— —
OFF OFF
No
OFF
change
— —
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