Справочник Пользователя для Mitsubishi Electronics MDS-R

 
 
 

 

 

10 - 7

 

Refer to the following section to troubleshoot alarms which occurred during start up or while the 
machine is operating. If the problem is not improved even after completing the following investigations, 
the servo drive unit may be faulty. In this case, replace the unit with one having the same capacity, and 
check whether the state is improved. 

 

Insufficient PN bus voltage was detected in main circuit. 

 

 

Check the output from the drive unit. 
  Is the connector (CN9) dislocated? 
  Is the cable broken? 

 
 Correctly connect. 
  Replace the cable. 

Check the contactor operation and 
continuity. 

Replace the contactor. 

1  Contactor operation or continuity is 

faulty. 

Check the contactor drive relay's 
operation and continuity. 

Replace the relay. 

Check the input voltage. 
  Is single-phase 200V or 100V input?
  Is there a phase failure? 

Input 3-phase 200V. 

2  Wire is broken or voltage is insufficient. 

Check the power capacity. 

Review the power. 

 

Setting of the axis No. selection switch is incorrect. 

 

 

1  When using the 2-axis servo drive unit, 

the same axis No. is selected for the L 
and M axes. 

Check the setting of the axis selection 
switch on the unit. 

Set the correct axis No. 
0 = 1st axis, 1 = 2nd axis, ... 

 

A CPU error or an internal memory error was detected during the power ON self-check. 

 

 

1  Refer to "10-2 Troubleshooting at power ON". 

 

 

Software processing has not finished within the specified time. 

 

 

Check whether the servo software 
version has been changed recently. 

Replace with a drive unit containing the 
original software version. 

Check the repeatability. 

If the problem is repeated, replace the 
drive unit. 

1  Software operation sequence is incorrect 

or operation timing is incorrect. 

Check for abnormalities in the drive 
unit's surrounding environment, etc. 
(Example: Ambient temperature, noise, 
grounding) 

Improve the surrounding environment. 
Example: High temperature  

  ... Check the cooling fan 
Incomplete grounding 
  ... Add grounding measures

 

Software processing has not finished within the specified time. 

 

 

1  Carry out items for alarm No. 13.