8 | Troubleshooting
NORIS Automation GmbH
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Instruction manual FA13
Troubleshooting
Recommended procedure
When troubleshooting the system, it is essential to precisely identify the
source of faults. Faults are often suspected in the wrong place. Targeted
fault localisation is therefore indispensable.
A reliable method is the
exclusion procedure
:
1. Temporarily replace components that are suspected of being damaged
by new components.
2. Temporarily interchange signal paths in order to locate the fault. If the
fault migrates, the cause of the fault can be clearly determined in most
cases.
Considerations for troubleshooting
Questions that can help you to quickly limit the scope of
troubleshooting
1.
What kind of fault is it?
Is no measuring signal present?
Is the signal distorted, faulty or weak?
2.
Can the sensor be clearly identified as the cause of the fault (con-
tinue with Question 4) or could the fault be attributed to condi-
tions on site or in the system, e.g. faulty wiring (continue with
Question 3)?
If possible, try replacing the sensor by a new fully functional sensor to rule
out the sensor as the cause of fault.
3.
Is the installation and/or wiring on site in perfect order? (If so,
continue with Question 4)
Further questions concerning installation and cabling:
Have you checked whether the installation is correct (installation direction,
scanning distance, screw connection, operating voltage supply, etc.)?
Is the cabling continuous (no terminal connections, etc.)?
Are the cables damaged (abrasions, breaks, kinks, etc.)?
Is the shield connected correctly? Is the system shield concept coherent?
Are the connector and the plug connection in perfect order (e.g. no pushed-
in contact pins)?
Is the connector adequately sealed?
Is the measuring area of the sensor clean (no metal chips)?
4.
Are there signs of mechanical damage on the sensor? If so, what
kind of damage is it? (If not, continue with Question 5)
If there is external damage to the sensor, it is recommended to replace the
sensor to ensure reliable operation of the system and to avoid subsequent
failure or consequential damage.
5.
Have you checked the sensor technically?
8
8.1
8.2