MDS-E/EH Series Instruction Manual
7 Troubleshooting
392
IB-1501229-F
Alarm No.
23
Excessive speed error
A difference between the speed command and speed feedback was continuously exceeding 50 r/min for longer than the setting
time.
Investigation details
Investigation results
Remedies
SV SP
1
Check the U, V and W wiring connected to the
spindle drive unit.
The wires are not correctly connected.
Correctly connect.
◯
The wires are correctly connected.
Check the investigation item No. 2.
2
Check the spindle parameter SP020, SP026,
SP027, from SP057 to SP064 and spindle
specification parameters from slimit1 to slimit4
setting value.
The correct values are not set.
Correctly set.
◯
The correct values are set.
Check the investigation item No. 3.
3
Measure the acceleration/ deceleration time from 0
to the point where the spindle speed reaches its
maximum.
If the alarm occurs when forward run is changed to
reverse run, measure the acceleration/ deceleration
time from the forward to reverse. Also measure it
from the reverse to forward.
12sec or more.
(SP117 setting value or more.)
Increase the spindle acceleration/
deceleration time constant setting
value(sp_t1 to sp_t4).
Reduce the load inertia.
◯
Less than 12sec.
Check the investigation item No. 4.
4
Check the load amount when the alarm occurred
during cutting.
The speed deterioration due to load amount
has exceeded the tolerable range which is
determined by the parameter SP096.
-If SP096 is set to 0, it is regarded as 85%.
Thus a speed of 85% of the machining speed
or faster will be the tolerable speed.
Reduce the cutting load to mitigate the speed
deterioration.
Replace the tool.
◯
The load amount is within the SP096 setting
value.
Check the investigation item No. 5.
5
Check the fluctuation of the input voltage into the
power supply unit with a tester.
Voltage drop during acceleration is 200V or
less
Review the power supply capacity.
◯
Voltage drop during acceleration is 200V or
more
Check the investigation item No.6.
6
Check the capacity of the drive unit.
The capacity does not satisfy the motor
output.
Change the capacity to the selected one.
◯
The capacity satisfies the motor output.
Replace the unit.
Alarm No.
24
Grounding
The motor power cable is in contact with FG (Frame Ground).
Investigation details
Investigation results
Remedies
SV SP
1
Measure the insulation across the power cables
(U,V,W) for connected motors and the ground.
(Carry out a megger test.)
(Note)
When the insulation is measured, disconnect wires
from the drive unit.
Less than 1M
Ω
. (Grounding)
The motor or power cable may be ground
faulted.
◯
◯
1M
Ω
or more. (Normal)
Check the investigation item No. 2.
2
Has oil adhered on the motor or power cable?
Oil has come adhered.
Take measures so that oil does not come in
contact. Check the motor's cannon connector
and the inside of the terminal box, and clean
as necessary.
◯
◯
Oil has not adhered.
Check the investigation item No. 3.
3
Measure the insulation again.
Less than 1M
Ω
.
Replace the motor or cable.
◯
◯
1M
Ω
or more.
Check the investigation item No. 4.
4
Measure the resistance across the U, V, W phase
terminals of the servo/spindle drive unit and the
ground with a tester.
(Note) Do not measure the insulation as the unit is
damaged.
Less than 100k
Ω
.
Replace the drive unit.
◯
◯
100k
Ω
or more.
Replace the power supply unit.
Alarm No.
25
Absolute position data lost
The absolute position was lost, as the backup battery voltage dropped in the absolute position encoder.
Investigation details
Investigation results
Remedies
SV SP
1
Is warning 9F occurring at the same time?
The warning is occurring.
Check the investigation item No. 2.
◯
The warning is not occurring.
Check the investigation item No. 3.
2
Measure the battery voltage with a tester at the DC
range.
Less than 3V.
Replace the battery, and establish the zero
point.
◯
3V or more.
Check the NC bus cable connection.
3
Did alarm No.18 occur when the power was turned
ON the last time?
Alarm No.18 occurred.
Turn the drive unit control power ON again,
and establish the zero point.
◯
Alarm No.18 did not occur.
Check the investigation item No. 4.
4
Was the encoder cable or battery cable left
disconnected from the unit for a long time?
The unit was left disconnected for a long
time.
Guide at delivery: 20 hours or more
After 5 years: 10 hours or more
Turn the drive unit control power ON again,
and establish the zero point.
◯
The cables were not left disconnected.
Check the investigation item No. 5.
5
Check the encoder cable or battery cable
connection with a tester.
The connection is faulty.
Replace the cable.
◯
The connection is normal.
Replace the drive unit.
Summary of Contents for MDS-E
Page 1: ......
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Page 32: ...1 IB 1501229 F 1 Installation ...
Page 76: ...45 IB 1501229 F 2 Wiring and Connection ...
Page 132: ...101 IB 1501229 F 3 Safety Function ...
Page 142: ...111 IB 1501229 F 4 Setup ...
Page 277: ...MDS E EH Series Instruction Manual 4 Setup 246 IB 1501229 F ...
Page 278: ...247 IB 1501229 F 5 Servo Adjustment ...
Page 351: ...MDS E EH Series Instruction Manual 5 Servo Adjustment 320 IB 1501229 F ...
Page 352: ...321 IB 1501229 F 6 Spindle Adjustment ...
Page 404: ...373 IB 1501229 F 7 Troubleshooting ...
Page 455: ...MDS E EH Series Instruction Manual 7 Troubleshooting 424 IB 1501229 F ...
Page 456: ...425 IB 1501229 F 8 Maintenance ...
Page 475: ...MDS E EH Series Instruction Manual 8 Maintenance 444 IB 1501229 F ...
Page 476: ...445 IB 1501229 F 9 Power Backup System ...
Page 494: ...463 IB 1501229 F 10 Appx 1 Cable and Connector Assembly ...
Page 504: ...473 IB 1501229 F 11 Appx 2 D A Output Specifications for Drive Unit ...
Page 514: ...483 IB 1501229 F 12 Appx 3 Protection Function ...
Page 523: ...MDS E EH Series Instruction Manual 12 Appx 3 Protection Function 492 IB 1501229 F ...
Page 524: ...493 IB 1501229 F 13 Appx 4 Compliance to EC Directives ...
Page 528: ...497 IB 1501229 F 14 Appx 5 EMC Installation Guidelines ...
Page 540: ...509 IB 1501229 F 15 Appx 6 Higher Harmonic Suppression Measure Guidelines ...
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