Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 693 / 1218

Parameters (A) Application parameters
FR-A800 5 - 491
●
Operation of magnetic contactor (MC1, MC2, MC3)
●
The input signals are as shown below.
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.
When the MRS signal is OFF, neither the commercial power supply operation nor the inverter
operation can be performed.
The CS signal operates only when the MRS signal is ON.
STF(STR) operates only when the MRS and CS signals are both ON.
Magnetic
contactor
Installation location
Operation
During commercial
power supply
operation
During inverter
operation
During inverter fault
MC1
Between power supply and
inverter input side
Shorted Shorted
Open
(short by reset)
MC2
Between power supply and
motor
Shorted Open
Open
(Selected by Pr. 138.
Always open when the
external thermal relay is
operating.)
MC3
Between inverter output side
and motor
Open Shorted Open
Tab. 5-202: Operations of magnetic contactors
Signal
Applied
terminal
Function Operation
MC operation
'
MC1
%
MC2 MC3
MRS
MRS
Selects whether or not
operation is available.
ON........ Electronic bypass
operation
available
 ⎯ ⎯
OFF ...... Electronic bypass
operation not
available

× Invariance
CS CS
Inverter/commercial
power supply operation
switchover
ON........ Inverter operation

×

OFF ...... Commercial
power supply
operation
 
×
STF
(STR)
STF
(STR)
Inverter operation
command
(Disabled during
commercial power supply
operation) ON........ Forward rotation
(reverse rotation)

×

OFF ...... Stop

×

OH
Set one of
Pr. 180 to Pr. 189
to "7".
External thermal relay
input
ON........ Motor normal

⎯ ⎯
OFF ...... Motor fault × × ×
RES RES
Operation status reset
$
ON........ Reset Invariance × Invariance
OFF ...... Normal operation

⎯ ⎯
X95/X96
Set "95" and
"96" in any of
Pr. 180 to
Pr. 189.
Converter unit fault /
Converter unit fault
(E.CPU, E.OHT)
X95 signal OFF,
X96 signal OFF
Converter fault
(E.OHT, 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)
×
⎯ &
×
Tab. 5-203: Input signals