Chapter 11 Troubleshooting
11–31
Alarm check timing
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Alarm No.
9B
Pole shift warning:
An error was detected in the pole shift amount set in servo parameter SV028.
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{
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Investigation details
Investigation results
Remedies
The system is not MDS-B-MD.
Investigate item 4.
1 Check whether the MDS-B-MD system
is being used.
The system is MDS-B-MD.
Investigate item 2.
Movement is possible several times
without a warning.
Investigate item 4.
2 Check whether the warning occurred at
the first movement after setting the
servo parameter (SV028).
The warning occurred at the first
movement.
Investigate item 3.
The SV028 setting value is the same
with the previous and current DC
excitation.
Investigate item 4.
3 Carry out DC excitation again, and
check the servo parameter (SV028)
setting value.
The SV028 setting value is different with
the previous and current DC excitation.
Set SV028 to the current DC excitation
value.
↓
If the problem is not resolved, check
investigation item 4.
The connector is disconnected (or
loose).
Correctly install.
4 Wiggle the connectors by hand to check
whether the MDS-B-HR connectors (unit
side, HR side and MD side) are
disconnected.
The connector is not disconnected.
Investigate item 5.
There is a connection fault.
Replace the communication cable.
5 Turn the power OFF, and check the
connection of the detector cables
(between driver I/F units and between
I/F unit and pole detector) with a tester.
The connection is normal.
Investigate item 6.
The alarm is on the unit side.
Replace the drive unit.
6 Connect with another normal axis unit
(or MDS-B-HR) and check whether the
fault is on the unit side or MDS-B-HR
(MDS-B-MD) side.
The alarm is on the MDS-B-HR
(MDS-B-MD) side.
Investigate item 7.
No abnormality is found in particular.
Replace MDS-B-HR (linear scale or
MDS-B-MD).
7 Check if there is any abnormality in the
unit's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
An abnormality was found in the
ambient environment.
Take remedies according to the causes of
the abnormality.
Ex.
High
temperature ...
Check the
cooling
fan.
Incomplete grounding .... Additionally
ground.
Alarm check timing
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Alarm No.
9C
HR unit pole warning:
An error was detected in the pole position data of the MDS-B-HR connected to the
MAIN side after passing the Z phase.
–
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Investigation details
Investigation results
Remedies
1 Check the alarm No. "86" items.
Alarm check timing
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Alarm No.
9D
HR unit pole warning (SUB):
An error was detected in the pole position data of the MDS-B-HR connected to the
SUB side after passing the Z phase.
–
{
{
{
Investigation details
Investigation results
Remedies
1 Check the alarm No. "86" items.
