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6. Troubleshooting
6 - 43
Warning No.
E7
NC emergency stop
Emergency stop was input from the NC.
Investigation details Investigation results Remedies SV SP
Emergency stop was input. The NC is in the emergency stop
state. (Normal)
1 Check whether NC emergency stop
was input.
Emergency stop was not input. Investigate item 2.
{ {
An alarm is occurring in another drive
unit.
Reset the alarm in the other drive
unit.
2 Check whether an alarm is occurring
in another drive unit.
An alarm is not occurring. Investigate item 3.
{ {
The terminator or battery unit's cable
is disconnected.
Correctly connect. 3 Check the NC communication bus
line.
The NC communication bus
connector (CN1A, CN1B) is loose, or
the cable is broken.
Correctly connect the cable.
{ {
Warning No.
E8
Auxiliary regeneration frequency over
Regeneration at the power supply performance limit is occurring frequently.
Investigation details Investigation results Remedies
CV CR
1 Check the alarm No. "75" items.
{
Warning No.
E9
Instantaneous power failure warning
An instantaneous power failure occurred.
Investigation details Investigation results Remedies
CV CR
1 Check the alarm No. "71" items.
{
Warning No.
EA
External emergency stop
The external emergency stop signal was input.
Investigation details Investigation results Remedies
CV CR
Use not allowed. Invalidate the external emergency
stop.
1 Check whether the specifications
allow use of the external emergency
stop.
Use is allowed. Investigate item 2.
{
24V is input. Replace the power supply unit. 2 Measure the input voltage of the
CN23 connector. (While emergency
stop is cancelled.)
24V is not input. Check whether the external
emergency stop cable is broken, or
check the external contact operation.
{
Warning No.
EB
Over-regeneration warning
The over-regeneration level is 80% or more.
Investigation details Investigation results Remedies
CV CR
1 Check the alarm No. "73" items.
{