MDS-E/EH Series Instruction Manual
7 Troubleshooting
391
IB-1501229-F
Alarm No.
1F
Sub side encoder: Communication error
An error was detected in communication data with the linear scale or the ball screw side encoder. Or the communication was
interrupted.
Investigation details
Investigation results
Remedies
SV SP
1
Jiggle the encoder connectors (drive unit side and
encoder side) and check if they are disconnected.
The connector is disconnected (or loose).
Correctly install.
◯
The connector is not disconnected.
Check the investigation item No. 2.
2
Is the encoder cable wired in the same conduit as
the motor's power cable, or are the two cables laid
in parallel near each other?
The cables are wired near each other. (Noise
is entering from the power cable.)
Wire the encoder cable away from the power
cable.
Shield the power cable.
◯
The wires are sufficiently separated.
Check the investigation item No. 3.
3
Is the motor FG wire connected only to the drive unit
which drives it?
(Is the motor grounded to one point?)
The motor FG wire is grounded on the motor
side.
Ground the motor to one point, connecting
the wires together on the drive unit side.
◯
The motor is grounded to one point.
Check the investigation item No. 4.
4
Turn the power OFF, and check the encoder cable
connection with a tester. (Is the cable shielded?)
The connection is faulty.
Replace the encoder cable.
◯
The connection is normal.
Check the investigation item No. 5.
5
Replace with another unit, and check whether the
fault is on the unit side or encoder side.
The alarm is on the drive unit side.
Replace the drive unit.
◯
The alarm is on the encoder side.
Check the investigation item No. 6.
6
Check if there is any abnormality in the encoder's
ambient environment.
(Ex. Ambient temperature, noise, grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
◯
Alarm No.
21
Sub side encoder: No signal2
When an excessive error alarm occurred, no signal from the machine side encoder was detected.
An error was detected in the ABZ-phase in the full closed loop control system.
Investigation details
Investigation results
Remedies
SV SP
1
Check the servo parameter (SV025. pen: machine
side encoder), and spindle parameter (SP019)
setting value.
Are the pulse type encoder parameters set for a
serial communication type encoder?
The value is not set correctly.
Correctly set SV025.pen for the servo and
SP019 for the spindle (including SP097 for
pulse type).
◯
◯
The value is set correctly.
Check the investigation item No. 3.
2
Jiggle the encoder connectors (drive unit side and
encoder side) and check if they are disconnected.
The connector is disconnected (or loose).
Correctly install.
◯
◯
The connector is not disconnected.
Check the investigation item No. 4.
3
Turn the power OFF, and check the encoder cable
connection with a tester.
The connection is faulty.
Replace the encoder cable.
◯
◯
The connection is normal.
Check the investigation item No. 5.
4
Replace with another unit, and check whether the
fault is on the unit side or encoder side.
The alarm is on the drive unit side.
Replace the drive unit.
◯
◯
The alarm is on the encoder side.
Replace the encoder.
5
Check if there is any abnormality in the encoder's
ambient environment.
(Ex. Ambient temperature, noise, grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
◯
◯
Alarm No.
22
Encoder data error:
Drive unit received a wrong feedback data (scattered data) from the encoder and position deviation occurred.
Investigation details
Investigation results
Remedies
SV SP
1
Check if the installation of the encoder is loosened.
It is loosened.
Tightly install the encoder.
◯
It is not loosened.
Check the investigation item No. 2.
2
Check if an excessive vibration is occurring during
machining.
An excessive vibration is occurring.
Check the installation of the machine.
◯
An excessive vibration is not occurring.
Check the investigation item No. 3.
3
Check if there is any liquid ingress inside the
encoder connector.
Liquid was entered into the connector.
Replace the motor encoder.
◯
◯
No liquid ingress.
Check the investigation item No. 4.
4
Check the investigation item No.2 or subsequent items in Alarm No.21.
◯
Summary of Contents for MDS-E
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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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