Mitsubishi Electric MELSERVO-J3W Series, Instruction Manual

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13. USING A LINEAR SERVO MOTOR
13 - 62
Alarm No.15 Name: Memory error 2 (EEP-ROM) Stop method: All axes stop
Alarm description Interior part of the servo amplifier (EEP-ROM) is faulty.
Display Name Cause Checkpoint Finding Action
15.1 EEP-ROM error
at power on
Same as for the rotary servo motor.
Refer to section 8.3.
15.2 EEP-ROM error
during operation
Alarm No.16 Name: Encoder initial communication error 1 Stop method: Corresponding axis stops
Alarm description Error occurs in the communication between the linear encoder and the servo amplifier.
Display Name Cause Checkpoint Finding Action
16.1 (1) Encoder cable is faulty. Check the shield. Problem found. Repair the cable. Encoder receive
data error 1
No problem found. Check (2).
(2) Fault is generated from
the surrounding
environment.
Problem found. Take countermeasure
according to the
cause. Check for noise,
surrounding air
temperature, and other
factors.
No problem found. Check (3).
(3) Servo amplifier is faulty. Check the reproducibility
of the error. Reproduced. Replace the servo
amplifier.
Not reproduced. Examine checkpoints
described in the alarm
display "16.3".
16.2 (1) Encoder cable is faulty. Examine checkpoints described in the alarm display "16.1". Encoder receive
data error 2
(2) Fault is generated from
the surrounding
environment.
(3) Replace the servo
amplifier.
16.3 Encoder receive
data error 3
(1) Motor-less operation is
not set. Select motor-less
operation When using only one
axis, select the motor-
less operation for the axis
to which the servo motor
is not connected. Check if parameter No.
PC05 is set to motor-less
operation for the unused
axis.
Motor-less operation is
set. Check (2).
(2) The encoder cable is
unplugged.
Not connected
properly. Connect properly. Check if the encoder
cable is connected
properly.
Connected properly. Check (3).
(3) Encoder cable is faulty. Problem found. Repair or replace the
cable. Check for breakage and
short of the encoder
cable.
Check the shield.
No problem found. Check (4).
(4) Setting is incorrect. Correct the setting. Two-wire/four-wire type
parameter setting is
incorrect. Check the parameter No.
PC04 setting.
Two-wire type: "00
"
Four-wire type: "10 "
Normal. Check (5).
(5) Connect to a properly
operating linear encoder. Alarm does not occur. Replace the linear
encoder.
Signal from the linear
encoder cannot be
received.
Alarm occurs. Check (6).
(6) Servo amplifier is faulty. Not reproduced. Replace the servo
amplifier. Replace the servo
amplifier and check the
reproducibility of the error. Reproduced. Check
(7).
(7) Fault is generated from
the surrounding
environment.
Check for noise, and
other factors. Problem found. Take countermeasure
according to the
cause.