Filter
Top Products
6 - 9
MDS-D-SVJ3/SPJ3 Series Instruction Manual
6-3 Troubleshooting
6-3 Troubleshooting
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.
6-3-1 Troubleshooting at power ON
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.
LED
display
Symptom Cause of occurrence Investigation method Remedy
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)