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Fieldbus coupler/controller
• 55
Fieldbus coupler 750-319
Modular I/O System
L
ON
W
ORKS
®
3.1.7.2 Fieldbus status
The operating status of the communication via LON is signalled via the top
LED group (SERVICE, STATUS and ICOM).
The SERVICE LED is directly connected to the Service Pin of the Neuron
®
Chip and indicates the state of the Neuron-C application.
SERVICE-
LED
Meaning
Trouble shooting
green
(lights up for
half a second
and then
remains off)
Configuration successfully completed.
Adress assigned and Neuron-C application is
active.
green blinks
(1 second on,
1 second off)
No configuration,
no addressing of the Network Management
Tool (domain, subnet, node), Neuron-C
application is not activated yet.
Press the Service-Pin of the coupler and check
the Neuron-C application
.
green blinks
(1 second on,
2 seconds off
then remains
on)
No Neuron-C application loaded on the node. Load the Neuron-C application from your net-
work management tool software into the node.
green blinks
cyclically
Watchdog Timer,
Neuron-C application error
Check the Neuron-C application, if necessary
restart the application.
The STATUS LED indicates that a coupler is activated. This is the case when
a wink task is sent and when the communication of both network manager and
DPRAM interface fails.
STATUS-
LED
Meaning
Trouble shouting
red blinks
(0,5 Hz)
5 times within the WINK task
(fault messages basically have a greater priority
than the WINK task.
red blinks
(2 Hz)
DPRAM interface communication fault (has
priority)
Reset fieldbus coupler hardware by switching off
the supply voltage of the coupler for about 3
seconds.
Change the fieldbus coupler if necessary.
The ICOM-LED indicates a communication and data exchange between Neu-
ron
®
Chip and µC165.
ICOM-LED
Meaning
Trouble shooting
green Data
exchange
off
No data exchange
Check bus system integrity