Absolute rotary encoder P**58
Diagnostic messages
Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany
Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com
Date of issue 01/15/04
30
6.3 Status information of LEDs
The connection hood is equipped with two LEDs that provide a visual indication of the
operating status on the rotary encoder. The red LED serves to display errors, while
the green LED displays the status of the rotary encoder. Each LED can be in one of
three states: On, Off, or Flashing. Of the nine possible combinations of these states,
only seven are used to indicate a special status.
If problems occur while the device is being placed in service, the status of the LEDs
should first be checked. Often this makes it possible to draw conclusions regarding
the cause of the error.
No. red LED green LED Status information/possible cause
1 off off no power supply
2on on
rotary encoder is ready for operation, but has not yet received
any configuration data based on voltage;
possible causes: address set incorrectly, bus line incorrectly
connected
3 on flashing
error in parameter assignment or configuration
the rotary encoder is receiving configuration or parameter
assignment data of incorrect length or inconsistent data;
possible cause: (for example) overall resolution set to high
4 flashing on
rotary encoder is ready for operation, but is not being
accessed by the master (for example the wrong address may
be accessed)
5on off
rotary encoder has not received any data for some time
(approx. 40 seconds) (the data line may be interrupted)
6 off on normal operation in Data Exchange mode
7 off flashing commissioning mode in Data Exchange mode
Status display
LED green
Error display
LED red
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