Mitsubishi Electric C70 Setup Manual page 576

Alarm No.
A/D converter error
17
An error was detected in the current FB.
Investigation details
1 Check the repeatability.
Check if there is any abnormality in the
unit's ambient environment.
2
(Ex. Ambient temperature, noise,
grounding)
Alarm No.
Main side detector: Initial communication error
18
An error was detected in the initial communication with the motor side detector.
Investigation details
Check the servo parameter (SV025.ent)
setting value.
1
Check the spindle parameter(SP020)
setting value.
Check the detector.
2 Check if a pulse detector is used for serial
detector specifications.
Jiggle the detector connectors (drive unit
3 side and detector side) and check if they are
disconnected.
Turn the power OFF, and check the detector
4
cable connection with a tester.
Replace with another unit, and check
5 whether the fault is on the unit side or
detector side.
Check if there is any abnormality in the
detector's ambient environment.
6
(Ex. Ambient temperature, noise,
grounding)
Alarm No.
Detector communication error in synchronous control:
19
An error was detected in the machine side detector of the secondary axis at the speed command synchronization control.
Investigation details
Check the servo parameter value of
1 secondary axis (SV025.pen:position
detector).
Check if there are no problems in the
2 connection between the detector (linear
scale) and MDS-B-HR.
Jiggle the detector connectors (drive unit
3 side and detector side) and check if they are
disconnected.
Turn the power OFF, and check the detector
4
cable connection with a tester.
Replace with another unit, and check
5 whether the fault is on the unit side or
detector side.
Check if there is any abnormality in the
detector's ambient environment.
6
(Ex. Ambient temperature, noise,
grounding)
Investigation results
The error is always repeated.
The state returns to normal, but occurs
thereafter.
Take remedies according to the causes of the abnormality in the ambient environment.
Investigation results
The value is not set correctly.
The value is set correctly.
The pulse detector is used.
The serial detector is used.
The connector is disconnected (or loose).
The connector is not disconnected.
The connection is faulty.
The connection is normal.
The alarm is on the drive unit side.
The alarm is on the detector side.
Take remedies according to the causes of the abnormality in the ambient environment.
[1] Machine grounding check
[2] Shield connection of the cable
Investigation results
The value is not set correctly.
The value is set correctly.
The screw connected to MDS-B-HR is
winded down.
No problems found in the connector
connection.
The connector is disconnected (or loose).
The connector is not disconnected.
The connection is faulty.
The connection is normal.
The alarm is on the drive unit side.
The alarm is on the detector side.
Take remedies according to the causes of the abnormality in the ambient environment.
[1] Machine grounding check
[2] Shield connection of the cable
Appendix 2.16 Troubleshooting
Remedies
Replace the drive unit.
Check the investigation item No. 2.
Remedies
Correctly set SV025 for the servo, and
SP020 for the spindle.
Check the investigation item No. 3.
Replace the detector to the serial.
Check the investigation item No. 3.
Correctly install.
Check the investigation item No. 4.
Replace the detector cable.
Check the investigation item No. 5.
Replace the drive unit.
Check the investigation item No. 6.
Remedies
Correctly set.
Check the investigation item No. 2.
Tighten up the screw.
Check the investigation item No. 3.
Correctly install.
Check the investigation item No. 3.
Replace the detector cable.
Check the investigation item No. 4.
Replace the drive unit.
Check the investigation item No. 5.
C70 Setup Manual
SV SP
SV SP
SV SP
559