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• Operation of magnetic contactor (MC1, MC2, MC3)
Magnetic
Installation location
contactor
Between power supply and
MC1
inverter input side
Between power supply and
MC2
motor
Between inverter output side
MC3
and motor
• The input signals are as shown below.
Signal
Applied terminal
*1
MRS
MRS
CS
CS
STF
STF
(STR)
(STR)
Set "7" in any of
OH
Pr.180 to Pr.189.
RES
RES
Set "95 or 96" in any
X95/X96
of Pr.180 to Pr.189.
*1
For separated converter types, the X10 signal is assigned to the terminal MRS in the initial setting. For the MRS signal, set "24" to any of Pr.180
to Pr.189 (Input terminal function selection) to assign the function to another terminal.
*2
When the MRS signal is OFF, neither the commercial power supply operation nor the inverter operation can be performed.
*3
Terminal CS is initially set to "no function". To enable the CS signal, set "6" in Pr.186 CS terminal function selection to assign the function to
a terminal. The CS signal operates only when the MRS signal is ON.
*4
STF (STR) operates only when the MRS and CS signals are both ON.
*5
The RES signal can be used for reset input acceptance with Pr.75 Reset selection/disconnected PU detection/PU stop selection. When the
RES signal and another input signal are simultaneously input, the MC operation by the RES signal has a higher priority.
*6
MC1 turns OFF at an inverter fault.
*7
When Pr.138 = "0 (electronic bypass invalid at a fault)", MC2 is OFF. When Pr.138 = "1 (electronic bypass valid at a fault)", MC2 is ON.
*8
MC operation is as shown below.
Notation
ON
×
OFF
During inverter operation: MC2-OFF, MC3-ON
During commercial power supply operation: MC2-ON, MC3-OFF
No change
The operation status before changing the signal state to ON or OFF is held.
• The output signals are as shown below.
Applied terminal
Signal
(Pr.190 to Pr.196 setting)
MC1
17
MC2
18
MC3
19
During commercial
power supply
operation
Shorted
Shorted
Open
Function
ON Electronic bypass operation
Selects whether or not
available
*2
operation is available.
OFF Electronic bypass operation not
available
Inverter/commercial power
ON Inverter operation
supply operation
OFF Commercial power supply
*3
switchover
operation
Inverter operation command
ON Forward rotation (reverse rotation) ○
(Disabled during
commercial power supply
OFF Stop
*4
operation)
ON Motor normal
External thermal relay input
OFF Motor fault
ON Reset
*5
Operation status reset
OFF Normal operation
X95 signal OFF, X96 signal OFF
Converter fault (E.OHT, E.CPU)
Converter unit fault /
X95 signal ON, X96 signal ON
Converter unit fault (E.OHT,
Converter normal
E.CPU)
X95 signal OFF, X96 signal ON
Converter fault (other than E.OHT or
E.CPU)
MC operation
Operation output signal of the magnetic contactor MC1 on the inverter's input side.
Operation output signal of the magnetic contactor MC2 for the commercial power
supply operation.
Operation output signal of the magnetic contactor MC3 on the inverter's output side.
Operation status
During inverter
operation
Open
Shorted
(short by reset)
Open
(Selected by Pr.138. Always open
Open
when the external thermal relay is
operating.)
Shorted
Open
Operation status
×
No change ×
×
×
Description
5.11 (A) Application parameters
During inverter fault
*8
MC operation
*6
MC1
MC2
MC3
×
No change
×
×
×
×
×
×
No change
×
×
*7
×
5. PARAMETERS
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