Mitsubishi MELDAS MDS-C1 Instruction Manual page 283

Encoder converter unit 2, automatic adjustment error
Alarm No.
An abnormal signal from the PLG was detected during automatic adjustment of the PLG.
8B
Investigation details
1 Check whether the MDS-B-PJEX
connectors (CN5) or detector
connectors are disconnected.
2 Turn the power OFF, and check the
detector cable connection with a
tester.
3 Check the PLG output waveform (A/B
phase).
4 Check the occurrence frequency.
Encoder converter unit 2, judgment error
Alarm No.
A detector type outside the specifications was detected with the MDS-B-PJEX.
8C
Investigation details
1 Check the spindle parameter SP042.
SP042: C-axis control detector range.
(Spindle end PLG No. of pulse
setting)
2 Check if there is any abnormality in
the unit's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
Detection converter unit 2, CPU error
Alarm No.
With the servo, a CPU error was detected with the MDS-B-HR unit. With the spindle, a CPU error was
8D
detected with the MDS-B-PJEX unit.
Investigation details
1 Check if there is any abnormality in
the detector's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
Detection converter unit 2, data error
Alarm No.
A data error was detected with the MDS-B-HR unit.
8E
Investigation details
1 Check whether the cable between
the linear scale and MDS-B-HR is
broken.
2 Check if there is any abnormality in
the unit's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
3 Try replacing the MDS-B-HR unit.
6. Troubleshooting
Investigation results
The connector is disconnected (or
loose).
The connector is not disconnected.
There is a connection fault.
The connection is normal.
There is a problem. (The A/B phase
input voltage is 0.8V or less or 2.2V
or higher.)
Normal
Occurs each time.
Occurs occasionally.
Investigation results
The setting was incorrect.
"4" : 128 pulses
"5" : 256 pulses
"6" : 512 pulses
"8" : 180 pulses
The setting is correct.
No abnormality is found in particular.
An abnormality was found in the
ambient environment.
Investigation results
No abnormality is found in particular.
An abnormality was found in the
ambient environment.
Investigation results
The cable is broken.
The cable is not broken.
No abnormality is found in particular.
An abnormality was found in the
ambient environment.
The state is improved.
The state is not improved.
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Remedies
Correctly install.
Investigate item 2.
Replace the detector cable.
Investigate item 3.
Adjust the PLG output waveform.
Investigate item 4.
Replace the MDS-B-PJEX unit.
Check whether the cable is
disconnected, whether there is a
contact fault, or a detector fault.
Remedies
Set correctly according to the No. of
PLG gear teeth.
Investigate item 2.
Replace the MDS-B-PJEX.
Take remedies according to the
causes of the abnormality.
Ex. High temperature:
Check the cooling fan.
Incomplete grounding:
Additionally ground.
Remedies
Replace the detection converter unit.
Take remedies according to the
causes of the abnormality.
Ex. High temperature:
Check the cooling fan.
Incomplete grounding:
Additionally ground.
Remedies
Replace the cable.
Investigate item 2.
Investigate item 3.
Take remedies according to the
causes of the abnormality.
Ex. High temperature:
Check the cooling fan.
Incomplete grounding:
Additionally ground.
Replace the MDS-B-HR unit.
Replace the linear scale.
SV SP
SV SP
SV SP
SV SP