Elgo LIMAX44 RED, Operating Manual

Page: 57 / 64

- 57 -
Disturbances
12.6 Possible Errors and their Clearance
12.6.1 General interferences
The following table shows possible interferences and their clearance.
Table 10: General interference clearance
Pos Problem Possible cause Necessary action
(1) The sensor does not transmit
position data The sensor is not supplied with energy Proceed with pos (7)
A severe error occurred. The LED
ERR
reports the
error through a blinking code (

9.3.1).
Replace the sensor.
(2) The sensor does not send safe
positions/ incomplete messages see pos (5) See pos (5)
(3) The sensor is constantly sending
position 0 There is no magnetic tape or it is strongly polluted
or damaged. Check the magnetic tape.
The sensor has detected an interference Read out the error register of the two channels and
proceed as described in

12.6.2 under the corre-
sponding bit
(4) None of the LED light up The sensor is not supplied with energy Proceed with pos (7)
(5) The LED
PWR B
doesn’t light up There is an undervoltage and the sensor therefore
is in single-channel operation. Check the regular power supply (see also

9.5.1)
(6) Only the LEDs
PWR A
and
PWR B
light up
The sensor is operated without the magnetic tape,
which means that the initialization cannot be
completed. Check the magnetic tape.
A severe error occured in the early phase of the
initialization.
Replace the sensor.
(7) The sensor is not supplied with
energy Blackout of the supply or interruption of the
supply line Check if the energy supply is working correctly and
the sensor is correctly connected to it.
The energy supply is not connected correctly Check if the supply line O V and +24 V are connect-
ed with the correct pole orientation. Exchange both
connections if necessary. If the problem still remains,
replace the sensor.
12.6.2 Non-severe Errors
The following table refers to the bits in the error register. (

12.2.3).
Table 11: Non-severe errors and their clearance
Bit Problem Possible cause Necessary action
0 General over- or un-
dervoltage
Overvoltage of the external supply Check the supply and exchange if necessary.
Defective hardware Replace the sensor.
1 … 6 Error in the monitoring of
the voltage.
Defective hardware Replace the sensor.
7 Interpolation error Defective hardware Replace the sensor.
8 … 12 Internal communication
error
Massive electromagnetic interference Perform the fault clearance according to

12.5 if
necessary
Defective hardware Replace the sensor.
13 Synchronization error
when switching between
single and dual channel
operation Strong electromagnetic interference Perform the fault clearance according to

12.5 if
necessary
Defective hardware Replace the sensor.
14 Synchronization error Strong electromagnetic interference Perform the fault clearance according to

12.5 if