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11. TROUBLESHOOTING
11.4.3 Remedies for warnings
CAUTION
If AL.E6 or AL.EA occurs, the servo off status is established. If any other warning occurs, operation can be
continued but an alarm may take place or proper operation may not be performed. Use the optional servo
configuration software to refer to the cause of warning.
Remove the cause of warning according to this section. Use the optional MR Configurator to refer to a factor
of warning occurrence.
Display
Name
A90
Home position
return incomplete
A92
Open battery cable
warning
A96
Home position
setting warning
If an absolute position counter warning (AE3) occurred, always make home
position setting again. Otherwise, misoperation may occur.
POINT
When any of the following alarms has occurred, do not resume operation by
switching power of the servo amplifier OFF/ON repeatedly. The servo
amplifier and servo motor may become faulty. If the power of the servo
amplifier is switched OFF/ON during the alarms, allow more than 30 minutes
for cooling before resuming operation.
Excessive regenerative warning (AE0)
Overload warning 1 (AE1)
Definition
Positioning operation
1. Positioning operation was performed
was performed
without home
position return.
Home position return
2. Home position return speed could not be
ended abnormally.
3. Limit switch was actuated during home
Positioning operation
1. Positioning operation was performed
was performed
without home
position setting.
Home position
2. Home position setting speed could not be
setting ended
abnormally.
3. Limit switch was actuated during home
Operation was
4. Voltage drop in encoder
performed without
making home
position setting while
an absolute position
5. Battery voltage low
erase (A25) is being
6. Battery cable or battery is faulty.
occurred.
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.
Cause
without home position return.
decreased to creep speed.
position return starting at other than
position beyond dog.
without home position setting.
decreased to creep speed.
position setting starting at other than
position beyond dog.
(Battery disconnected.)
amplifier to the encoder fell to about 3V or
less.
(Detected with the encoder)
the in-position range setting.
droop pulses.
11 - 10
Action
Perform home position return.
Review home position return
speed/creep speed/moving
distance after proximity dog.
Perform home position setting.
Review home position setting
speed/creep speed/moving
distance after proximity dog.
After leaving the alarm occurring
for a few minutes, switch power
off, then on again. Always make
home position setting again.
Change battery.
Always make home position
setting again.
Repair cable or changed.
Change battery.
Remove the cause of droop pulse
occurrence
Do not enter command pulse
after clearing of droop pulses.
Reduce creep speed.
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