© CEDES | V 2.2 23
Fault - APS sensor Action
Green PWR LED does not light No power:
Check the connection to the downstream processing unit.
Check if the downstream system is powered.
Red STAT LED blinks slowly (1 Hz) APS internal fault:
Switch the system OFF and then ON again.
Check the supply 24 VDC ±20%.
Red STAT LED blinks quickly (5 Hz) No CAN / RS485 communication, error or no acknowledge.
Switch the system OFF and then ON again.
Check the connection to the downstream processing unit.
Check if the downstream processing unit is powered.
Check the cabling.
Check the data rate of the downstream system.
Check the communication protocol of the downstream processing unit.
RED STAT LED ON or blinks irreguarly Reading error:
Due to the error correction / extrapolation of APS, it is still possible that valid
positions are transmitted.
Check that the code tape is mounted.
Clean the optical window.
Clean the code tape.
Check the alignment between the sensor and the code tape.
Check that the code tape is not upside down. Ensure that the "LEFT"
reference on the code tape is on the left side of the code tape.
Triangular alignment LED light Misalignment of the sensor to the code tape:
Check the mounting of the sensor.
Check the mounting of the code tape.
Check the alignment between the sensor and the code tape.
10. Troubleshooting
For more information, refer also the APS Safety Manual.
If a problem persists, please contact your local CEDES representative. Visit www.cedes.com for contact data.
11. Maintenance
Although the APS system, which has a touchless and
wear-free operating principle and does not need regular
maintenance, a periodical functional check is strongly
recommended. In line with the recurring checks defined
by the system integrator for the safety related application,
the following checks and maintenance must also be
performed:
Check for correct installation.
Check for the hard- and software version.
Check if maintenance is according the APS Manual.
Check the mounting position and detection area of the
sensor.
Clean the optical window with a soft towel and a little
soapy water.
Clean the code tape with a soft towel and a little soapy
water.
Clean the guide clips and the position indicator clips
with a soft towel and a little soapy water.
CAUTION
Possible health risks
Follow the maintenance instructions given
by the system integrator.
After any maintenance of the APS sensor,
code tape or any clip, verify correct
operation via a service ride.
After a down-time of 12 months, verify
correct operation by a service ride.
Use only original CEDES spare parts for
repair and replacement.
Use only the original CEDES code tape.
Repairing the code tape is prohibited.
Repair of the components may only be
performed by CEDES AG. Repair in the
field is prohibited.
NOTICE
Damage to the optical elements
Never use any solvents, cleaners
or mechanically abrasive towels or
highpressure water to clean the sensor or
any components of the APS system (sensor,
code tape, clips).
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