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11. TROUBLESHOOTING
Display
Name
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
AE8
Cooling fan speed
reduction warning
AE9
Main circuit off
warning
Definition
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 stroke end (LSP or
The limit switch became valid.
LSN) of the 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.)
The speed of the servo
Cooling fan life expiration (Refer to section
amplifier decreased to or
2.5.)
below the warning level.
This warning is not
displayed with MR-J3-
The power supply of the cooling fan is
70T/100T among servo
broken.
amplifiers equipped with a
cooling fan.
Servo-on (SON) was
switched on with main
circuit power off.
Cause
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 - 11
Action
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 regenerative option for
the one with larger capacity.
3. Reduce load.
Refer to AL.50, AL.51.
Take noise suppression
measures.
Change servo motor.
Make home position setting
again.
Ensure safety and deactivate
forced stop.
Change the cooling fan of the
servo amplifier.
Change servo amplifier.
Switch on main circuit power.
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