Mitsubishi Electric Melservo-J3 Series MR-J3-B, Instruction Manual

Page: 363 / 802

11 - 6
11. TROUBLESHOOTING
Display Name Definition Cause Action
(Note 2)
Alarm
detailed
information
A15 Memory error 2
(EEP-ROM)
EEP-ROM fault 1. Faulty parts in the servo amplifier
<Check method>
The alarm occurs even if the power is
switched on after disconnection of all
cables except the control circuit
power supply cable.
Change the servo amplifier.
2. The number of write times to EEP-
ROM exceeded 100,000.
A16 Encoder error 1
(At power on) Communication
error occurred
between encoder
and servo amplifier. 1. Encoder connector (CN2) is
disconnected.
Connect correctly. 44
2. A wrong type of encoder cable (2-
wire, 4-wire) was selected in
parameter setting.
Correct the setting in the
fourth digit of parameter
No.PC22.
3. Encoder cable faulty
(Wire breakage or shorted)
Repair or change the cable.
4. Encoder fault. Change the servo motor.
5. Servo motor other than that of MR-J3
series was connected.
Check the combination of
the servo amplifier and
servo motor. 63
6. External noise caused a
communication error.
<Check method>
1. Check that the encoder cable and
the power cable run in parallel.
2. Check if the environment is
affected by the noise of
surrounding electromagnetic valve,
magnetic contactor, relay, etc.
3. Check the servo amplifier and
servo motor for grounding.
4. Check if there is a factor causing
surrounding static electricity.
5. Check shield procedure of the
encoder cable.
Take the grounding and
noise reduction techniques.
A17 Board error CPU/parts fault Faulty parts in the servo amplifier.
<Check method>
Alarm occurs even if the power is
switched on after disconnection of all
cables except the control circuit
power supply cable.
Change the servo amplifier.
A19 Memory error 3
(Flash ROM)
ROM memory fault
A1A Motor
combination
error
Wrong combination
of servo amplifier
and servo motor. Wrong combination of servo amplifier
and servo motor connected. Check the combination of
the servo amplifier and the
servo motor.