Mitsubishi Electric FR-F740 EC Instruction Manual page 529

Parameter
● Operations of magnetic contactors MC1, MC2 and MC3
Magnetic
Contactor Installation Place
MC1
MC2
MC3
Tab. 6-124: Operations of magnetic contactors
● The input signals are as indicated below.
Signal
MRS
CS
STF
(STR)
OH
RES
Tab. 6-125: 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. 6-126: Output signals
FR-F700 EC
Commercial Power
Between power
supply and inverter
input
Between power
supply and motor
Between inverter
output and motor
Terminal
Function
Used
Operation enable/
disable selection
MRS
Inverter/commercial
switchover
CS
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
ON
(ON by reset)
(Can be selected using
OFF
Pr. 138, always OFF when
external thermal relay is on)
ON
MC Operation
MC1
ON
ON
ON
ON
ON
ON
ON
ON
No
change
ON
OFF
OFF
OFF
MC2 MC3
— —
No
OFF
change
OFF ON
ON OFF
OFF ON
OFF ON
— —
OFF OFF
No
OFF
change
— —
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