
110 • Programmable Field Bus Controller 750-833
LED Signaling
WAGO-I/O-SYSTEM 750
Bus System
3.11.2 Field Bus Status
The upper four LEDs signal the operating status of the PROFIBUS
communication.
LED Color Meaning
RUN green The RUN-LED shows the user whether the field bus controller is
functioning correctly.
BF red The BF-LED indicates whether the communication is functioning
via the PROFIBUS.
DIA red The DIA-LED indicates an external diagnostics.
BUS red The BUS-LED signals a projecting fault.
RUN BF DIA BUS Meaning Remedy
off off off off No operating voltage to
the coupler or a
hardware fault is
present.
Check the voltage supply for
the bus coupler and replace the
bus coupler if necessary.
on on * off PROFIBUS interface
started, baud rate was
not yet recognized.
Check to see whether the
PROFIBUS is connected.
Check to see whether the baud
rate parameterized on the
master is supported by the
coupler.
Replace the bus coupler
because there is a hardware
defect.
on blinks * off Baud rate recognized,
station not yet
parameterized and
configured.
Check the configuration and
the slave addresses.
Load the coupler by switching
the supply voltage off and on
again.
on blinks on blink
code
Slave was incorrectly
parameterized.
Evaluate the blink code
on off * off The coupler is
exchanging data.
Ok
on * on * The coupler signals an
existing diagnostics.
The data exchange is
functioning without any
problems so that you may
obtain diagnostics information,
for instance on a cable
breakage in an analog input
terminal.
* not relevant
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