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Chapter 8 Troubleshooting
8-3
8-2 Troubleshooting at start up
If the CNC system does not start up correctly and a system error occurs when the CNC power is
turned ON, the servo amplifier may not have been started up correctly.
Confirm the LED display on the amplifier, and take measures according to this section.
LED
display
Symptom
Cause of occurrence
Investigation method
Remedy
The amplifier axis No. setting
is incorrect.
Is there any other amplifier that has the
same axis No. set?
Set correctly.
The CNC setting is incorrect. Is the No. of CNC controlled axes
correct?
Set correctly.
Is the connector (CN1A, CN1B)
disconnected?
Connect correctly.
AA Initial
communication
with the CNC was not
completed correctly.
Communication with CNC is
incorrect.
Is the cable broken?
Check the conductivity with a tester.
Replace the cable.
The axis is not used, the
setting is for use inhibiting.
Is the axis setting rotary switch set to
"7" to "F"?
Set correctly.
Is the connector (CN1A, CN1B)
disconnected?
Connect correctly.
Ab Initial
communication
with the CNC was not
carried out.
Communication with CNC is
incorrect.
Is the cable broken?
Check the conductivity with a tester
Replace the cable.
Check the repeatability.
Replace the
amplifier.
–0 ~ –F
Amplifier self diagnosis
error
(Alarm 15 may appear on
the CNC unit screen.)
Amplifier fault
Check the grounding state and ambient
temperature.
Improve the
ambient
environment.
00
Amplifier has not started. Amplifier fault
Check the repeatability.
Replace the
amplifier.
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