PROFIBUS USER MANUAL Leine & Linde AB
Part Id: 740590-01
17
Document Id: 740590 Ver. 01
Publication date: 2010-06-01
3.5 LED indication
In order to determine the status of the encoder two LEDs are visible from the rear end
of the encoder. The module LED indicates status of the module itself. The bus LED
indicates the status of the bus. The table below defines the diagnostic messages using
a red (BUS) and a bicolor, Red/Green, LED (MODULE).
Bus
Module
Meaning
Cause
Off Off No
Power
Red
Green
No connection to another device
Criterion: no data exchange
- Bus disconnected
- Master not available / switched off
Red
2)
Red
2)
No connection to another device
No connection between EnDat
encoder and PROFIBUS PCB
- No connection to EnDat Encoder at
power up
Blinking Red
1 )
Green
Parameterization or configuration
fault
- Configuration received differs from
the supported configuration.
- Parameter error in the
parameterization.
Green Red
System Failure
- Diagnosis exists, slave in data
Exchange mode
- Position error
Green Green Data
exchange.
Slave and operation ok.
Table 10 LED indication
1) The blinking frequency is 0.5 Hz. Minimal indication time is 3 sec.
2) Position error is when an alarm occurs in the encoder or if the EnDat encoder is
disconnected from the PROFIBUS interface PCB.