ifm electronic RN3001 - Manual (Page 27)

UK
Encoder with Profibus interface
27
11.2.14 Serial number
According to the encoder profile, diagnostic bytes 48���57 are intended for a serial
number� At the moment the serial number is not stored in the device; the bytes are
pre-assigned with 2A hex�
12 LED indicators
12.1 Legend
LED on / lit The terminal cap has two LEDs that optically represent
the bus status on the encoder�
The red LED is used to display errors; the green LED to
display the status of the encoder� Each LED has three
states: off, on, flashing� Seven of the nine possible com-
binations are used to display a certain state�
Should there be problems during start-up of the device,
the status of the LEDs is to be checked; it often gives
information about the cause of the fault�
LED flashes
LED off
Colour Status /
frequency
Colour Status /
frequency
Description
Red Green No voltage supply
The encoder is operational but has not received any
configuration data after the voltage was applied�
Possible causes: Address incorrectly set; bus cables
incorrectly connected�
Parameter setting or configuration fault
The encoder receives configuration or parameter setting
data of an incorrect size or inconsistent data�
Possible cause: e�g� total resolution is set too high
The encoder is operational but is not addressed by the
master (e�g� incorrect address is addressed)�
The encoder does not receive any data for a longer
time (approx� 40 s) (e�g� data line interrupted)
Normal operation in the data exchange mode
Set-up in the data exchange mode