Mr-J2S-B Detection Error - Mitsubishi Electric MELSEC-Q QD75M User Manual

15 TROUBLESHOOTING

15.2.4 MR-J2S-B detection error

LED
Classifica
Error
indicator
tion of
code
of servo
errors
amplifier
2010 10
2012 12
2013 13
2015 15
2016 16
Servo
2017 17
amplifier
errors
2019 19
2020 1A
2020 20
2024 24
2025 25
Error name
•For MR-J2S- B:
The power supply voltage dropped
to 160VAC or less.
Under voltage
• For MR-J2S- B1:
The power supply voltage dropped
to 83VAC or less.
Memory error 1 RAM memory error.
Clock error Printed circuit board fault.
Memory error 2 EEP-ROM error
Communication error occurred
Encoder error 1
between encoder and servo amplifier.
Board error 2 CPU or parts of the circuit fault.
Memory error 3 ROM memory error.
Servomotor
Wrong combination of servo amplifier
combination
and servomotor.
error
Communication error occurred
Encoder error 2
between encoder and servo amplifier.
Motor output Servomotor output (U, V, W phase)
side ground fault ground fault.
Absolute position data in error.
Absolute position
lost
Power was switched on for the first
time in the absolute position detection
system.
Description
15 - 56
MELSEC-Q
Cause
The power supply voltage is low.
There was an instantaneous control
power failure of 60ms 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 servo amplifier.
Faulty parts in the servo amplifier.
The encoder connecter (CN2) is
disconnected.
Fault in the encoder.
Encoder cable fault. (Wire breakage
or shot)
Faulty parts in the servo amplifier.
Wrong combination of servo
amplifier and servomotor
connected.
The encoder connecter (CN2) is
disconnected.
Fault in the encoder.
Encoder cable fault. (Wire breakage
or shot)
Power input wires and servomotor
output wires are in contact at main
circuit terminal block (TE1).
Sheathes of servomotor power
cables deteriorated, resulting in
ground fault.
Voltage low in the super capacitor in
the encoder.
Battery voltage low.
Battery cable or battery fault.
Super capacitor of the absolute
position encoder is not charged.