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

Page: 375 / 802

11 - 18
11. TROUBLESHOOTING
Display Name Definition Cause Action
A96 Home position
setting warning
Home position setting
could not be made. 1. Out of in-position range at home
positioning.
Make home position setting within
the in-position range.
2. Position command was inputted during
the home position setting.
Input position command after
home positioning.
3. Creep speed high. Reduce creep speed.
A98 Software limit
warning
Software limit set in
parameter is reached. 1. Software limit was set within actual
operation range.
Set parameter No.PC31 to PC34
correctly.
2. Point table of position data in excess of
software limit was executed.
Set point table correctly.
3. Software limit was reached during JOG
operation or manual pulse generator
operation.
Perform operation within software
limit range.
A99 Stroke limit
warning
The limit switch of
command rotation
direction (LSP or LSN)
was turned off. The forward rotation stroke end (LSP) was
turned off during forward rotation. Reexamine the travel range not
to turn off LSP/LSN.
The reverse rotation stroke end (LSN) was
turned off during reverse rotation.
A9D CC-Link warning 1 The station number switch
or baud rate switch
position was changed
from the setting at power-
on.
1. The station number switch position was
changed from the setting at power-on.
Restore to the setting at the time
of power on.
2. The baud rate switch position was
changed from the setting at power-on.
3. The occupied station count switch
position was changed from the setting at
power-on.
A9E CC-Link warning 2 Communication error of
cable.
1. The transmission status is abnormal. Take measures against noise.
2. Incorrect wiring of CC-Link twisted cable 1. Change the CC-Link twisted
cable.
2. Connect the cable or connector
correctly.
3. CC-Link twisted cable faulty.
4. The CC-Link connector has come off.
5. The termination resistor is not connected. Connect the termination resistor
correctly.
6. Noise entered the CC-Link twisted cable.
A9F Battery warning Voltage of battery for
absolute position
detection system reduced. Battery voltage fell to 3.2V or less.
(Detected with the servo amplifier) Change the battery.
AE0 Excessive
regenerative
warning
Regenerative power may
exceed the permissible
regenerative power of the
built-in regenerative
resistor or the
regenerative option. Regenerative power increased to 85% of
the permissible regenerative power of the
built-in regenerative resistor or the
regenerative option.
<Check method>
Call the status display and check the
regenerative load ratio.
1. Reduce frequency of
positioning.
2. Change the regenerative
option to the one with larger
capacity.
3. Reduce the load.
4. Change the servo
amplifier/servo motor to the
one with larger capacity.
AE1 Overload warning
1
Overload alarm 1 or 2
may occur. Load increased to 85% or more of the
overload alarm 1 or 2 occurrence level. Refer to overload 1 (A50) and
overload 2 (A51).
AE3 Absolute position
counter warning
Absolute position encoder
pulses faulty. 1. Noise entered the encoder. Take measures against noise.
2. Encoder faulty. Change the servo motor.
The multi-revolution
counter value of the
absolute position encoder
exceeded the maximum
revolution range. 3. The movement amount from the home
position exceeded 32767 rotations or
37268 rotations in succession.
Make home position setting
again.
AE6 Servo forced stop
warning
EMG is off. External forced stop was enabled. (EMG
was turned off.) Ensure safety and deactivate
forced stop.