MITSUBISHI ELECTRIC MR-J2S- CL - Manual (Page 236)

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11. TROUBLESHOOTING
11.2.3 Remedies for warnings
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 servo
configuration software to refer to the cause of warning.
Display Name Definition Cause Action
1. Battery cable is open. Repair cable or changed. AL.92 Open battery
cable warning
Absolute position
detection system battery
voltage is low.
2. Battery voltage dropped to 2.8V or less. Change battery.
AL.97 Program
operation disable
Program was started in a
program operation
disable status. After a program change, the program was
started without the servo amplifier being
powered off/on. Power off/on the servo amplifier.
1. Software limit was set within actual
operation range.
Set parameter No. 48 to 51
correctly.
2. Program of position data in excess of
software limit was executed.
Set program correctly.
AL.98 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.
AL.9F Battery warning Voltage of battery for
absolute position
detection system reduced.
Battery voltage fell to 3.2V or less. Change the battery.
AL.E0 Excessive
regenerative
warning
There is a possibility that
regenerative power may
exceed permissible
regenerative power of
built-in regenerative
brake resistor or
regenerative brake
option. Regenerative power increased to 85% or
more of permissible regenerative power of
built-in regenerative brake resistor or
regenerative brake option.
Checking method
Call the status display and check
regenerative load ratio.
1. Reduce frequency of
positioning.
2. Change regenerative brake
option for the one with larger
capacity.
3. Reduce load.
AL.E1 Overload
warning
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 AL.50,51.
Refer to AL.50, AL.51.
1. Noise entered the encoder. Take noise suppression
measures. AL.E3 Absolute position
counter warning
Absolute position encoder
pulses faulty.
2. Encoder faulty. Change servo motor.
AL.E6 Servo forced stop
warning
EMG-SG are open. External forced stop was made valid.
(EMG-SG opened.) Ensure safety and deactivate
forced stop.
AL.E9 Main circuit off
warning
Servo was switched on
with main circuit power
off. Switch on main circuit power.