Mitsubishi A1SD75M3 User Manual page 623

14 TROUBLESHOOTING
Relevant buffer memory
address
Axis 1 Axis 2 Axis 3
Measure the input voltage (R, S, T) with a
voltmeter.
Check if an instantaneous power failure
occurred.
Observe the input voltage with an
oscilloscope.
Measure the input voltage (R, S, T) with a
voltmeter.
Change the unit.
Change the unit.
Change the unit.
Make visual check (to see if the connector is
disconnected or almost disconnected).
Change the servomotor.
Check the cable (change the cable).
Change the unit.
Check if the MC, etc. are operated at error
occurrence timing.
Check the cable (change the cable).
Keep the power ON for a few minutes in the
error state and switch the power OFF, then
ON.
After switching the power OFF, measure the
voltage across the battery.
If the error still persists after the above
remedy.
Check the setting of " Pr.102 Regenerative
102 252 402
brake resistor".
Check the connection.
1. Reconsider the regenerative brake torque
and the frequency of use of regenerative
braking.
2. Check the regenerative load factor in the
monitor mode.
Check the resistance of the regenerative
power transistor using a tester.
Check the resistance of the regenerative brake
resistor.
Checking method
14 - 35
Remedy
Review the power supply capacity.
Review the power supply capacity.
Change the unit.
Change the unit.
Change the unit.
Connect correctly.
Change the servomotor.
Repair or change the cable (do not apply external force to
the cable).
Change the unit.
Take noise suppression measures.
Repair or change the cable (do not apply external force to
the cable).
Keep the power ON for a few minutes to charge the super
capacitor, and switch the power OFF, then ON.
Perform initial setting of the zero point.
Change the battery.
Set correctly.
Connect correctly.
1. Reduce the frequency of use of positioning.
2. Add the regenerative brake option.
3. Increase the servomotor capacity.
4. Reduce the load.
Change the unit.
Change the regenerative brake resistor.
MELSEC-A