Mitsubishi Electric 800 Series Instruction Manual page 380

• Operation of magnetic contactor (MC1, MC2, MC3)
Magnetic Installation location
contactor
MC1 Between power supply and inverter input side Shorted
MC2 Between power supply and motor
MC3 Between inverter output side and motor
• The input signals are as shown below.
Signal Applied terminal
MRS
*1
MRS
CS CS
STF STF (STR)
(STR)
OH Set one of Pr.180
to Pr.189 to "7".
RES RES
X95/X96 Set "95" and "96"
in any of Pr.180
to Pr.189.
*1 When the X10 signal is not assigned to any input terminal using Pr.178 to Pr.189 while Pr.30 Regenerative function selection = "10 or 110",
the MRS signal is used as the X10 signal. Assign the X10 signal to an input terminal not used for inputting the MRS signal. 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 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 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.
During commercial
power supply operation
Shorted
Open
Function
Selects whether or not ON Electronic bypass operation
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 ON Forward rotation (reverse
command (Disabled during rotation)
commercial power supply
OFF Stop
*4
operation)
External thermal relay input ON Motor normal
OFF Motor fault
*5 ON Reset
Operation status reset
OFF Normal operation
Converter unit fault / X95 signal OFF, X96 signal OFF
Converter unit fault (E.OHT, Converter fault (E.OHT, E.CPU)
E.CPU)
X95 signal ON, X96 signal ON
Converter normal
X95 signal OFF, X96 signal ON
Converter fault (other than E.OHT
or E.CPU)
MC operation
Operation
During inverter
operation
Shorted
Open
Shorted
Operation
MC1








Unchanged




5.11 (A) Application parameters
During inverter fault
Open
(short by reset)
Open
(Selected by Pr.138. Always
open when the external
thermal relay is operating.)
Open
*8
MC operation
*6
MC2 MC3
- -
 Unchanged
 
 
 
 
- -
 

Unchanged
- -
 
- -

*7
-
5. PARAMETERS
3
4
5
5
5
6
7
8
9
10
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