Mitsubishi Electric MELSERVO-J3 Series Manual page 361

11. TROUBLESHOOTING
Display Name
A92 Open battery cable
warning
A96 Home position
setting warning
A98 Software limit
warning
A99 Stroke limit
warning
A9D CC-Link warning 1 The station number switch
A9E CC-Link warning 2 Communication error of
A9F Battery warning
AE0 Excessive
regenerative
warning
AE1 Overload warning
1
AE3 Absolute position
counter warning
AE6 Servo forced stop
warning
Definition
Absolute position 1. Battery cable is open.
detection system battery
2. Battery voltage supplied from the servo
voltage is low.
Home position setting 1. Droop pulses remaining are greater than
could not be made.
2. Command pulse entered after clearing of
3. Creep speed high.
Software limit set in 1. Software limit was set within actual
parameter is reached.
2. Point table of position data in excess of
3. Software limit was reached during JOG
The limit switch become The stroke end (LSP or LSN) of the
valid. direction which gave instructions was turned
off.
1. The station number switch position was
or baud rate switch
position was changed
2. The baud rate switch position was
from the setting at power-
on.
3. The occupied station count switch
1. The transmission status is abnormal.
cable.
2. CC-Link twisted cable wiring incorrect.
3. CC-Link twisted cable faulty.
4. The CC-Link connector has come off.
5. The terminating resistor is not connected.
6. Noise entered the CC-Link twisted cable.
Voltage of battery for Battery voltage fell to 3.2V or less.
absolute position (Detected with the servo amplifier)
detection system reduced.
There is a possibility that Regenerative power increased to 85% or
regenerative power may more of permissible regenerative power of
exceed permissible built-in regenerative resistor or regenerative
regenerative power of option.
built-in regenerative
resistor or regenerative
option.
There is a possibility that Load increased to 85% or more of overload
overload alarm 1 or 2 may alarm 1 or 2 occurrence level.
occur.
Absolute position encoder 1. Noise entered the encoder.
pulses faulty.
2. Encoder faulty.
The multi-revolution 3. The movement amount from the home
counter value of the
absolute position encoder
exceeded the maximum
revolution range.
EMG is off. External forced stop was made valid. (EMG
was turned off.)
Cause
amplifier to the encoder fell to about 3V or
less.
(Detected with the encoder)
the in-position range setting.
droop pulses.
operation range.
software limit was executed.
operation or manual pulse generator
operation.
changed from the setting at power-on.
changed from the setting at power-on.
position was changed from the setting at
power-on.
Checking method
Call the status display and check
regenerative load ratio.
Cause, checking method
Refer to A50, A51.
position exceeded a 32767 rotation or
37268 rotation in succession.
11 - 12
Action
Repair cable or changed.
Change the battery.
Remove the cause of droop pulse
occurrence
Do not enter command pulse
after clearing of droop pulses.
Reduce creep speed.
Set parameter No.PC31 to PC34
correctly.
Set point table correctly.
Perform operation within software
limit range.
Reexamine the operation pattern
to turn LSP/LSN ON.
Return to the setting at power-on.
Take measures against noise.
1. Change the CC-Link twisted
cable.
2. Connect the cable or connector
correctly.
Connect the terminating resistor
correctly.
Change the battery.
1. Reduce frequency of
positioning.
2. Change the regenerative
option for the one with larger
capacity.
3. Reduce load.
Refer to A50, A51.
Take noise suppression
measures.
Change the servo motor.
Make home position setting
again.
Ensure safety and deactivate
forced stop.