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INTERBUS S / Startup
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23
6 Buscoupler startup and troubleshooting
After configuration of the master connection and electrical installation of the fieldbus
node/station, operation of the system can begin.
After power to the Buscoupler and I/O modules has been applied, the Buscoupler
verifies all internal functions, components and the communication interface by an
internal diagnostic routine. Then the function modules and the existing configuration is
determined. At the same time a hidden file is stored. It consists of an input and an output
area which is located on the fieldbus RAM of the log chip. During the power up phase
the ‘I/O ERR’ LED flashes with an increased frequency. After a faultless power up the
fieldbus coupler enters the state ‘fieldbus start’. The green LED ‘RUN’ indicates that
the Bus is operating normally.
In case of a fault the red ‘I/O ERR’ LED will continue flashing.
By counting the number and frequency of flashes the fault can be easily identified
quickly and accurately. A varying number of flashes and frequencies defines the fault.
The table below describes the fault condition based on the counted number of ‘I/O ERR’
LED flashes.
2. Blinking sequence 3. Blinking sequence description
error code error argument
10
1
overflow of internal buffer for inline code
2
unknown data type
20
error in programmed process image
N (N>0)
error in comparison of tables: module N
(programmed configuration), passive modules like supply
terminal blocks do not count
30
modules have identified error in fieldbus commands
40
data error on fieldbus or fieldbus break at the coupler
4 N (N>0)
fieldbus break after module N
5N
filedbus error in register communications with module N
6
error in INTERBUS-S configuration telegram
0
too lillte configuration data
N (0<N<65)
error in 1st configuration byte
Table 5: Diagnosis LEDs - on buscoupler
3DXVH VHTXHQFH3DXVH VHTXHQFHVHTXHQFH