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11. TROUBLESHOOTING
Display Name Definition Cause Action
1. Battery cable is open. Repair cable or changed. A92 Open battery cable
warning
Absolute position
detection system battery
voltage is low.
2. Battery voltage supplied from the servo
amplifier to the encoder fell to about 3V or
less.
(Detected with the encoder)
Change the battery.
1. Droop pulses remaining are greater than
the in-position range setting.
Remove the cause of droop pulse
occurrence
2. Command pulse entered after clearing of
droop pulses.
Do not enter command pulse
after clearing of droop pulses.
A96 Home position
setting warning
Home position setting
could not be made.
3. Creep speed high. Reduce creep speed.
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.
A98 Software limit
warning
Software limit set in
parameter is reached.
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 become
valid.
The stroke end (LSP or LSN) of the
direction which gave instructions was turned
off.
Reexamine the operation pattern
to turn LSP/LSN ON.
1. The station number switch position was
changed from the setting at power-on.
2. The baud rate switch position was
changed from the setting at power-on.
A9D CC-Link warning 1 The station number switch
or 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.
Return to the setting at power-on.
1. The transmission status is abnormal. Take measures against noise.
2. CC-Link twisted cable wiring incorrect.
3. CC-Link twisted cable faulty.
4. The CC-Link connector has come off.
1. Change the CC-Link twisted
cable.
2. Connect the cable or connector
correctly.
5. The terminating resistor is not connected.
A9E CC-Link warning 2 Communication error of
cable.
6. Noise entered the CC-Link twisted cable.
Connect the terminating resistor
correctly.
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
There is a possibility that
regenerative power may
exceed permissible
regenerative power of
built-in regenerative
resistor or regenerative
option.
Regenerative power increased to 85% or
more of permissible regenerative power of
built-in regenerative resistor or regenerative
option.
Checking method
Call the status display and check
regenerative load ratio.
1. Reduce frequency of
positioning.
2. Change the regenerative
option for the one with larger
capacity.
3. Reduce load.
AE1 Overload warning
1
There is a possibility that
overload alarm 1 or 2 may
occur.
Load increased to 85% or more of overload
alarm 1 or 2 occurrence level.
Cause, checking method
Refer to A50, A51.
Refer to A50, A51.
1. Noise entered the encoder. Take noise suppression
measures.
AE3 Absolute position
counter warning
Absolute position encoder
pulses faulty.
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 a 32767 rotation or
37268 rotation in succession.
Make home position setting
again.
AE6 Servo forced stop
warning
EMG is off. External forced stop was made valid. (EMG
was turned off.)
Ensure safety and deactivate
forced stop.