Mitsubishi MELDAS MDS-C1 Instruction Manual page 287

NC emergency stop
Warning No.
Emergency stop was input from the NC.
E7
Investigation details
1 Check whether NC emergency stop
was input.
2 Check whether an alarm is occurring
in another drive unit.
3 Check the NC communication bus
line.
Auxiliary regeneration frequency over
Warning No.
Regeneration at the power supply performance limit is occurring frequently.
E8
Investigation details
1 Check the alarm No. "75" items.
Instantaneous power failure warning
Warning No.
An instantaneous power failure occurred.
E9
Investigation details
1 Check the alarm No. "71" items.
External emergency stop
Warning No.
The external emergency stop signal was input.
EA
Investigation details
1 Check whether the specifications
allow use of the external emergency
stop.
2 Measure the input voltage of the
CN23 connector. (While emergency
stop is cancelled.)
Over-regeneration warning
Warning No.
The over-regeneration level is 80% or more.
EB
Investigation details
1 Check the alarm No. "73" items.
6. Troubleshooting
Investigation results
Emergency stop was input.
Emergency stop was not input.
An alarm is occurring in another drive
unit.
An alarm is not occurring.
The terminator or battery unit's cable
is disconnected.
The NC communication bus
connector (CN1A, CN1B) is loose, or
the cable is broken.
Investigation results
Investigation results
Investigation results
Use not allowed.
Use is allowed.
24V is input.
24V is not input.
Investigation results
6 - 42
Remedies
The NC is in the emergency stop
state. (Normal)
Investigate item 2.
Reset the alarm in the other drive
unit.
Investigate item 3.
Correctly connect.
Correctly connect the cable.
Remedies
Remedies
Remedies
Invalidate the external emergency
stop.
Investigate item 2.
Replace the power supply unit.
Check whether the external
emergency stop cable is broken, or
check the external contact operation.
Remedies
SV SP
CV CR
CV CR
CV CR
CV CR