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10. TROUBLESHOOTING
Display Name Definition Cause Action
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 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.
A9A Option unit input
data error warning
Setting error of BCD input
data.
1. The minus symbol is set at the
incremental value command.
Set the symbol correctly.
2. The plus and minus symbols are set
simultaneously.
3. The value of "9" or more is set to the first
digit.
Set the BCD value 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.
AE3 Absolute position
counter warning
Absolute position encoder
pulses faulty.
1. Noise entered the encoder. Take noise suppression
measures.
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.
AE8 Cooling fan speed
reduction warning
The speed of the servo
amplifier decreased to or
below the warning level.
This warning is not
displayed with MR-J3-
70T/100T among servo
amplifiers equipped with a
cooling fan.
Cooling fan life expiration. (Refer to section
2.5.)
Change the cooling fan of the
servo amplifier.
The power supply of the cooling fan is
broken.
Change the servo amplifier.
AE9 Main circuit off
warning
Servo-on (SON) was
switched on with main
circuit power off.
Switch on main circuit power.