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Chapter 11 Troubleshooting
11–28
Alarm check timing
f1 f2 f3 f4
Alarm No.
86
HR unit pole error:
An error was detected in the pole data of the MDS-B-HR connected to the MAIN
side.
–
{ { {
Investigation details Investigation results Remedies
The connector is disconnected (or
loose).
Correctly install. 1 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 2.
There is a connection fault. Replace the communication cable. 2 Turn the power OFF, and check the
connection of the detector cables
(between driver and I/F units and
between I/F unit and pole detector) with
a tester.
The connection is normal. Investigate item 3.
The alarm is on the unit side. Replace the drive unit. 3 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 4.
No abnormality is found in particular. Replace MDS-B-HR (MDS-B-MD). 4 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
f1 f2 f3 f4
Alarm No.
88
Watch dog:
The servo drive software processing time did not end within the specified time.
{ { { {
Investigation details Investigation results Remedies
The version was changed. Replace with the original software version. 1 Check whether the servo software
version has been changed recently.
The version was not changed. Investigate item 2.
No abnormality is found in particular. Replace the drive unit. 2 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
f1 f2 f3 f4
Alarm No.
89
HR unit connection error (SUB):
An incorrect connection or cable breakage was detected in the MDS-B-HR
connected to the SUB side.
–
{ { {
Investigation details Investigation results Remedies
1 Check the alarm No. "80" items.
CAUTION
To prevent trouble, when changing the motor and driver combination, avoid
driving a driver with a larger capacity than the specified driver using the motor.
The motor could be demagnetized. Note that this combination can be used for
checking in the emergency stop state. The motor can be driven with a driver
with a capacity smaller than the specifications.