11. Troubleshooting
11
−
7
(6) Alarm No. 23 : EXCESSIVE SPEED ERROR
[Details]
The error between the speed command and the current speed exceeded 50rpm for 12
seconds.
Investigation items
Investigation results
Remedy
The wiring is not connected correctly. Wire correctly.
1 Check the U, V, W
wiring between the
spindle drive unit and
motor.
The wiring is connected correctly.
Investigate item 2, and carry out the
appropriate measures.
The correct value is not set.
Set the correct value.
2 Check the spindle
parameter (SP034,
SP040, SP055, SP257
and after) setting
values.
The correct value is set.
Investigate item 3, and carry out the
appropriate measures.
Acceleration/deceleration takes 12
sec. or more.
Increase the spindle parameter
(SPO55) setting value.
3 Measure
the
acceleration/decelerati
on time to the max.
spindle speed. If the
alarm occurs when
changing from forward
run to reverse run or
vice versa, measure
the acceleration/
deceleration time from
the max. forward run
speed to the max.
reverse run speed (or
vice versa).
Acceleration/deceleration takes 12
sec. or less.
Investigate item 4, and carry out the
appropriate measures.
The load amount is 120% or more.
Decrease the load amount.
4 If the alarm occurs
during cutting, check
the load amount.
The load amount is 119% or less.
Investigate item 5, and carry out the
appropriate measures.
Connector came (was coming) loose. Install correctly.
5 Jiggle the speed
detector connector
(spindle drive unit side
and speed detector
side) to see whether it
is coming loose.
Connector did not come (was not
coming) loose.
Investigate item 6, and carry out the
appropriate measures.
The connection is faulty, or there is a
broken wire.
Replace the detector cable. Correctly
connect the cable.
6 Turn the power OFF,
and check the speed
detector cable
connection with a
tester.
The connection is normal.
Replace the spindle drive unit.
