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7 Troubleshooting
MITSUBISHI CNC
Warning No.
E1
Overload warning
Overload detection level exceeded 80%.
Investigation details Investigation results Remedies SV SP
1 Check if the motor is hot.
Motor is hot. Check the alarm No. "50" items.
◯
Motor is not hot. Check the investigation item No. 2.
2
Check if an error occurs when executing
acceleration/deceleration operation.
Error is not found in operation. Thus,
operation is possible.
Ease the operation patter, if possible. If no
alarm occurs, operation can be continued as
it is.
◯
Error is found in operation.
Check the investigation item 3 or later of
Alarm No. 50.
3 Check the alarm No. "50" items.
◯◯
Warning No.
E4
Set parameter warning
An incorrect parameter was detected among the parameters received from the CNC.
Investigation details Investigation results Remedies SV SP
1 Check the error parameter No.
SV001 to SV256
SP001 to SP256
Set the value within the designated setting
range.
◯◯
2 Check the spindle control input 4/bit 0 to 2.
Selected other than 000, 001, 010 and 100
when the alarm occurred.
Correctly select.
◯
Warning No.
E6
Control axis detachment warning
Control axis detachment was commanded.
Investigation details Investigation results Remedies SV SP
1 The status in which removal of the control axis was commanded from the NC is indicated.
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Warning No.
E7
In NC emergency stop state
Emergency stop was input from the CNC.
Investigation details Investigation results Remedies SV SP
1
Check if the emergency stop is applied on the NC
side.
The emergency stop is applied. Check the investigation item No. 2.
◯◯
The emergency stop is cancelled. Check the investigation item No. 3.
2 Cancel the emergency stop.
Normally starts up. Normal.
◯◯
"E7" remains displayed. Check the investigation item No. 3.
3
Check whether an alarm is occurring in another
drive unit.
An alarm is occurring in another drive unit. Reset the alarm in the other drive unit.
◯◯
An alarm is not occurring. Check the investigation item No. 4.
4 Turn the power of NC and 200VAC (400V) ON again
◯◯
Warning No.
E9
Instantaneous power interruption warning
The power was momentarily interrupted.
Investigation details Investigation results Remedies CV
1 Check the alarm No. "71" items.
◯
Warning No.
EA
In external emergency stop state
External emergency stop signal was input.
Investigation details Investigation results Remedies CV
1
Check whether the specifications allow use of the
external emergency stop.
Use is not allowed. Invalidate the external emergency stop.
◯
Use is allowed. Check the investigation item No. 2.
2
Measure the input voltage of the CN23 connector.
(While emergency stop is cancelled.)
24V is input. Replace the power supply unit.
◯
24V is not input.
Check whether the external emergency stop
cable is broken, or check the external contact
operation.
Warning No.
EB
Power supply: Over regeneration warning
Over-regeneration detection level exceeded 80%.
Investigation details Investigation results Remedies CV
1 Check the alarm No. "73" items.
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