Troubleshooting At Start Up - Mitsubishi Electric MELDAS MDS-R Series Technical Specification And Instruction Manual

10-2 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 drive unit or spindle drive unit may not have been started up correctly.
Confirm the LED display on each unit, and take measures according to this section.
LED
Symptom
display
AA Initial communication with
the CNC was not
completed correctly.
Ab Initial communication with
the CNC was not carried
out.
12 An error was detected in a
memory IC or feedback
IC by self-check to be
made during the unit
power ON.
If the LED on the top of the drive unit shows the emergency stop (E7) warning, the system has started
up correctly.
F1
F + axis No.
10. Troubleshooting
Cause of occurrence
The drive unit axis No. setting
is incorrect.
The CNC setting is incorrect. Is the No. of CNC controlled axes
Communication with CNC is
incorrect.
The axis is not used, the
setting is for use inhibiting.
Communication with CNC is
incorrect.
CPU peripheral circuit error
E7 F1
Emergency F + axis No.
stop
Normal LED display at NC power ON (for 1st axis)
10 - 3
Investigation method
Is there any other drive unit that has the
same axis No. set?
correct?
Is the connector (CN1A, CN1B)
disconnected?
Is the cable broken?
Check the conductivity with a tester.
Is the axis setting rotary switch set to "7"
to "F"?
Is the connector (CN1A, CN1B)
disconnected?
Is the cable broken?
Check the conductivity with a tester.
Check the repeatability.
Check the grounding state and ambient
temperature.
E7
Emergency
stop
Remedy
Set correctly.
Set correctly.
Connect correctly.
Replace the cable.
Set correctly.
Connect correctly.
Replace the cable.
Replace the unit.
Improve the ambient
environment.
Not lit