Справочник Пользователя для Mitsubishi Electronics IB-1500193(ENG)-D

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Follow this section to troubleshoot the alarms that occur during start up or while the machine is operating. If 

the state is not improved with the following investigations, the drive unit may be faulty. Exchange the unit 

with another unit of the same capacity, and check whether the state is improved.

If the NC system does not start up correctly and a system error occurs when the NC power is turned ON, the 

drive unit may not have been started up properly. Check the LED display on the drive unit, and take 

measures according to this section.

The drive unit has started up normally if the following type of emergency stop (E7) is displayed on the display 

unit's LED display.

AA

Initial communication with 
the CNC was not completed 
correctly.

The drive unit axis No. setting 
is incorrect.

Is there any other drive unit that has the 
same axis No. set?

Set correctly.

The CNC setting is incorrect.

Is the No. of CNC controlled axes cor-
rect?

Set correctly.

Communication with CNC is 
incorrect.

Is the connector (CN1A, CN1B) connect-
ed?

Connect correctly.

Is the cable broken?

Replace the cable.

Ab

Initial communication with 
the CNC was not carried 
out.

The axis is not used, the set-
ting is for use inhibiting.

Is the DIP switch set correctly?

Set correctly.

Communication with CNC is 
incorrect.

Is the connector (CN1A, CN1B) connect-
ed?

Connect correctly.

Is the cable broken?

Replace the cable.

12

An error was detected in the 
unit's memory and IC during 
the self-diagnosis at power 
ON.

The CPU peripheral circuit is 
abnormal.

Check the repeatability.

Replace the unit.

Check whether there is any abnormality 
with the unit's surrounding environment, 
etc.

Improve the sur-
rounding environ-
ment.

F1

 

F+axis No.

 

E7

 

Emergency stop

 

Not lit

 

F1

 

F+axis No.

 

E7

 

Emergency stop

 

Normal drive unit LED display at NC power ON (for 1st axis)