LNS QUICK LOAD SERVO S3 Troubleshooting And Spare Parts Manual page 46

Chapter 1: Alarms
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
AL.90 Home position
return
incomplete
AL.92 Open battery
cable warning
AL.96 Home position
setting warning
AL.98 Software limit
warning
AL.9F Battery warning
AL.E0 Excessive
regenerative
warning
AL.E1 Overload
warning
AL.E3 Absolute
position counter
warning
AL.E6 Servo
emergency stop
warning
AL.E9 Main circuit off
warning
Definition
In incremental system: 1. Positioning operation was performed
1. Positioning operation without home position return.
was performed without 2. Home position return speed could
home position return. not be decreased to creep speed.
2. Home position return 3. Limit switch was actuated during
ended abnormally. home position return starting at other
than position beyond dog.
In absolute position 1. Positioning operation was performed
detection system: without home position setting.
1. Positioning operation 2. Home position setting speed could
was performed without not be decreased to creep speed.
home position setting. 3. Limit switch was actuated during
2. Home position setting home position setting starting at other
ended abnormally. than position beyond dog.
Absolute position 1. Battery cable is open.
detection system battery
2. Battery voltage dropped to 2.8V or
voltage is low.
less.
Home position setting 1. Droop pulses remaining are greater
could not be made. than the in-position range setting.
2. Command pulse entered after
clearing of droop pulses.
3. Creep speed high.
Software limit set in 1. Software limit was set within actual
parameter is reached. operation range.
2. Point table of position data in excess
of software limit was executed.
3. Software limit was reached during
JOG operation or manual pulse
generator operation.
Voltage of battery for Battery voltage fell to 3.2V or less.
absolute position
detection system
reduced.
There is a possibility Regenerative power increased to 85%
that regenerative power or more of permissible regenerative
may exceed permissible power of built-in regenerative brake
regenerative power of resistor or regenerative brake option.
built-in regenerative
brake resistor or Checking method
regenerative brake Call the status display and check
option. regenerative load ratio.
There is a possibility Load increased to 85% or more of
that overload alarm 1 or overload alarm 1 or 2 occurrence level.
2 may occur.
Cause, checking method
Refer to AL.50, 51.
Absolute position 1. Noise entered the encoder.
encoder pulses faulty.
2. Encoder faulty.
EMG-SG is open. External emergency stop was made
valid. (EMG-SG opened.)
Servo was switched on
with main circuit power
off.
Cause
1. Perform home position
return.
2. Review home position
return speed/creep
speed/moving distance after
proximity dog.
1. Perform home position
setting.
2. Review home position
setting speed/creep
speed/moving distance after
proximity dog.
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.
Set parameter No. 48 to 51
correctly.
Set point table correctly.
Perform operation within
software limit range.
Change the battery.
1. Reduce frequency of
positioning.
2. Change regenerative
brake option for the one with
larger capacity.
3. Reduce load.
Refer to AL.50, AL.51.
Take noise suppression
measures.
Change servo motor.
Ensure safety and
deactivate emergency stop.
Switch on main circuit
power.
QUICK LOAD SERVO S3
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Action