APPENDICES
APP
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20
Table 2.14 Servo Amplifier Error List (2000 to 2799)
Error Cause
Error
Code
Name
Description
When Error Checked
Error
Processing
Corrective Action
•
The power supply voltage is less than
160 VAC. (320VAC or less for 400VAC
series servo)
•
Measure the input voltage (R, S, T) with a
voltmeter.
•
A momentary power, interruption of
15ms or longer has occurred.
•
Monitor with an oscilloscope to check whether a
momentary power interruption has occurred.
2010
Low voltage
•
The power supply voltage dropped, for
example when motion control started,
due to insufficient power capacity.
At any time during operation.
•
Review the power capacity.
2012
Memory error 1
•
Servo amplifier SRAM is faulty.
•
Servo amplifier EPROM check sum
error.
•
When the servo amplifier
power is turned ON
•
At the leading edge of the PLC
READY flag (M2000)
•
When a servo error is reset
•
When the power to the servo
system CPU is turned ON
•
Replace the servo amplifier.
2013
Clock error
•
Servo amplifier clock fault.
•
Replace the servo amplifier.
2014
Watchdog
•
Servo amplifier hardware fault
•
Servo system CPU hardware fault
At any time during operation
•
Replace the servo amplifier.
•
Replace the servo system CPU.
2015
Memory error 2
•
Servo amplifier EEPROM fault
•
When the servo amplifier
power is turned ON
•
At the leading edge of the PLC
READY flag (M2000)
•
When a servo error is reset
•
When the power to the servo
system CPU is turned ON
•
Replace the servo amplifier.
2016
Position sensor
error 1
•
Fault in communication with the
encoder
•
When the servo amplifier
power is turned ON
•
At the leading edge of the PLC
READY flag (M2000)
•
When a servo error is reset
•
When the power to the servo
system CPU is turned ON
•
Check if the connector of the encoder cable is
loose.
•
Replace the servomotor.
•
Replace the encoder cable.
2017
PCB error
•
Faulty device in the servo amplifier
PCB.
•
When the servo amplifier
power is turned ON
•
At the leading edge of the PLC
READY flag (M2000)
•
When a servo error is reset
•
When the power to the servo
system CPU is turned ON
•
Replace the servo amplifier.
2019
Memory error 3
•
Servo amplifier flash ROM check sum
error
•
When the servo amplifier
power is turned ON
•
At the leading edge of the PLC
READY flag (M2000)
•
When a servo error is reset
•
When the power to the servo
system CPU is turned ON
•
Replace the servo amplifier.
2020
Encoder error 2
•
Fault in communication with the
encoder
•
Check if the connector of the encoder cable is
loose.
•
Replace the servomotor.
•
Replace the encoder cable.
2021
Converter RD off
(400VAC series
servo only)
•
The servo-on (SON) signal turned ON
when the ready signal (RD) of the
converter is OFF.
1. Bus voltage is OFF.
2. Alarm occurring in converter.
•
Remove the cause of the converter alarm.
Deactivate the alarm.
2024
Output ground
fault
•
U, V, or W of the servo amplifier output
grounded
At any time during operation
•
Check if the servo motor and cable have been
grounded.
•
Correct the grounding.
•
Replace the servomotor.
•
The voltage of the supercapacitor inside
the absolute encoder has dropped.
•
Turn the power ON for 2 to 3 minutes to charge
the supercapacitor, switch the power OFF then
ON again, and execute a zeroing.
•
The battery voltage is low.
•
Turn the servo amplifier power OFF, then
measure the battery voltage.
2025
Battery alarm
•
Failure of battery cable or battery.
(Home position return must be re-
executed after clearing the error.)
•
When the servo amplifier
power is turned ON
•
At the leading edge of the PLC
READY flag (M2000)
•
When a servo error is reset
•
When the power to the servo
system CPU is turned ON
Immediate stop
•
Replace the servo amplifier battery.
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