After elimination of the fault, the buscoupler can only be set to the normal working condition by another POWER ON sequence.
The green I/O LED flashes when accessing the I/O modules internal data channels. After being switched on, the buscoupler queries the configuration of the bus modules but does not carry out a data exchange with the I/O modules. This means that the red I/O LED will extinguish after a faultless startup. The green I/O LED will indicate when data is being exchanged by the Interbus network.
Status and error diagnostics:
The fieldbus LEDs show the state of the bus system. The functions of Interbus S are shown by the LEDs „READY“, „BA“, „RC“ and „RD“.
READY
on
on
on
on
off
BA
off
on
off
off
off
RC
off
off
on
off
off
RD
off
off
off
on
off
Meaning
Buscoupler ready
Fieldbus active; data exchange
incoming connection established
Field bus off
error in cable or master
no function ; no voltage
Help
search error in cable or master
Table 7: Diagnostic LEDs - fieldbus
INTERBUS S / Startup | 24 |
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