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MELSEC-A
14 TROUBLESHOOTING
14.2.3 Errors detected by MR-J-B
Error
code
Servo
amplifier
LED display
Name and definition Occurrence factor
1. Power supply voltage is 160VAC or less.
2. An instantaneous power failure occurred for 15ms or longer.
2010 10
Undervoltage
The power supply voltage (R, S, T)
dropped to or below the given level
(160VAC).
3. Shortage of power supply capacity caused the power supply
voltage to drop at start, etc.
2012 12
Memory error 1
ROM, RAM
J-C21 printed board fault
2013 13 Clock error J-C21 printed board fault
2015 15
Memory error 2
E
2
PROM
J-C21 printed board fault
1. Encoder connector disconnected.
2. Servomotor encoder faulty.
2016 16 Encoder error 1
3. Encoder cable faulty (open cable or short circuit)
2017 17 Board error J-P4 printed board fault
1. Excessive noise generated.
2020 20 Encoder error 2
2. Encoder cable fault (open cable or short circuit)
1. Voltage low in the super capacitor in the detector (set-up start)
2. Battery voltage low
2025 25 Absolute position erase
3. Battery cable or battery is faulty.
1. " Pr.102 Regenerative brake resistor" setting error
2. Regenerative brake resistor not connected.
3. Max. regenerative load exceeded.
(1) High-duty operation caused the maximum load capacity of the
regenerative brake resistor to be exceeded.
(2) Continuous regenerative operation caused the maximum load
capacity of the regenerative brake resistor to be exceeded.
4. Regenerative power transistor damaged (short circuit).
2030 30 Regenerative error
5. Regenerative brake resistor faulty.
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