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Chapter 11 Troubleshooting
11–27
Alarm check timing
f1 f2 f3 f4
Alarm No.
83
HR unit scale judgment error:
The MDS-B-HR connected to the MAIN side could not judge the analog frequency of
the connected linear scale.
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{ { {
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, linear scale 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, between
I/F unit and scale 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
(linear scale or MDS-B-MD) side.
The alarm is on the MDS-B-HR (linear
scale or MDS-B-MD) side.
Investigate item 4.
No abnormality is found in particular. Replace MDS-B-HR (linear scale or
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.
84
HR unit CPU error:
The CPU of the MDS-B-HR connected to the MAIN side is not operating correctly.
{
– – –
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 and HR 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) 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
and check whether the fault is on the
unit side or MDS-B-HR side.
The alarm is on the MDS-B-HR side. Investigate item 4.
No abnormality is found in particular. Replace MDS-B-HR. 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.
85
HR unit data error:
An error was detected in the analog interpolation data of the MDS-B-HR connected
to the MAIN side.
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{ { {
Investigation details Investigation results Remedies
1 Check the alarm No. "80" items.