Remedies For Warnings - Mitsubishi Electric MR-J2S-CP Instruction Manual

11. TROUBLESHOOTING

11.2.3 Remedies for warnings

CAUTION
If AL.E6 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 MR
Configurator (servo configuration software) to refer to the cause of warning.
Display Name
AL.90 Home position
return
incomplete
AL.92 Open battery
cable warning
AL.96 Home position
setting warning
If an absolute position counter warning (AL.E3) 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 (AL.E0)
Overload warning 1 (AL.E1)
Definition
Positioning operation
was performed
without home
position return.
Home position return
ended abnormally.
Positioning operation
was performed
without home
position setting.
Home position setting
ended abnormally.
Operation was
performed without
making home position
setting while an
absolute position
erase (AL.25) is being
occurred.
Absolute position
detection system battery
voltage is low.
Home position setting
could not be made.
Cause
1. Positioning operation was performed
without home position return.
2. Home position return speed could not be
decreased to creep speed.
3. Limit switch was actuated during home
position return starting at other than
position beyond dog.
1. Positioning operation was performed
without home position setting.
2. Home position setting speed could not be
decreased to creep speed.
3. Limit switch was actuated during home
position setting starting at other than
position beyond dog.
4. Voltage drop in encoder
(Battery disconnected.)
5. Battery voltage low
6. Battery cable or battery is faulty.
1. Battery cable is open.
2. Battery voltage supplied from the servo
amplifier to the encoder fell to about
3.2V or less.
(Detected with the encoder)
1. Droop pulses remaining are greater
than the in-position range setting.
2. Command pulse entered after clearing
of droop pulses.
3. Creep speed high.
11 - 9
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.