15 - 76
MELSEC-Q
15 TROUBLESHOOTING
15.2.6 MR-J2M-B detection error
LED indicator
of servo
amplifier
Classifica
tion of
errors
Error
code
IFU DRU
Error name Description Cause
The power supply voltage is low.
There was an instantaneous control
power failure of 30ms or longer.
Shortage of power supply capacity
caused the power supply voltage to
drop at start, etc. .
Power was restored after the bus
voltage had dropped to 200VDC.
(Main circuit power switched on
within 5s after it had switched off.)
Faulty parts in the base unit.
Faulty parts in interface unit.
2010
FA. 10
—
Under voltage
The power supply voltage
dropped to 160VAC or less.
CNP3 or CNP1B connector
unplugged.
2012
FA.12
—
Memory error 1 ROM or RAM memory error.
2013
FA.13
—
Clock error Printed circuit board fault.
2014
FA.14
—
Watchdog error CPU parts of the circuit fault.
2015
FA.15
—
Memory error 2 EEP-ROM error
Faulty parts in interface unit.
2012
—
@A.12#
Memory error 1 ROM or RAM memory error.
2013
—
@A.13#
Clock error Printed circuit board fault.
2014
—
@A.14#
Watchdog error CPU parts of the circuit fault.
2015
—
@A.15#
Memory error 2 EEP-ROM error
Faulty parts in the drive unit.
The encoder connecter is
disconnected.
Fault in the encoder.
2016
—
@A.16#
Encoder error 1
Communication error occurred
between encoder and drive unit.
Encoder cable fault. (Wire breakage
or shot)
2017
—
@A.17#
Board error 2 CPU or parts of the circuit fault. Faulty parts in the drive unit.
2019
FA.19 @A.19#
Memory error 3 Flash memory error.
Faulty parts in the interface unit or
drive unit.
2020
—
@A.1A#
Servomotor
combination
error
Wrong combination of drive unit
and servomotor.
Wrong combination of drive unit
and servomotor connected.
Servo
amplifier
errors
2021
FA.1B
—
Axis set error
Drive unit installed on the same
base unit have the same axis.
IFU parameter
"
Pr.111
" to
"
Pr.118
"
setting mistake.
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