Technical data

58 • Fieldbus coupler/controller
Fieldbus coupler 750-310
WAGO-I/O-SYSTEM 750
CC-Link
3.1.5 LED Display
The coupler possesses seven LEDs for on site display of the coupler and node
operating status.
Fig. 3-10:Display elements g013901x
3.1.5.1 CC-Link Status
The CC-Link status is displayed by the top 4 LEDs. They react as described in
the following table.
L RUN L ERR SD RD Operation
ON BLINK BLINK ON Communicating normally, but CRC erors have
often been detected due to noise.
ON BLINK
0.4s
BLINK ON The baud rate or station number setting has been
changed from the settings at the reset cancellation.
ON BLINK OFF ON Unable to respond because the received data
caused a CRC error.
ON OFF BLINK ON Normal communication.
ON OFF OFF ON No data for the host.
OFF BLINK BLINK ON Responds to polling signal, but the refresh recepti-
on caused a CRC error.
OFF BLINK OFF ON Data for the host caused a CRC error.
OFF OFF OFF ON Either no data for the host or unable to receive the
data for host due to noise.
OFF OFF OFF OFF Unable to receive due to wire breakage, etc., Po-
wer off or hardware being set.
OFF ON OFF ON or
OFF
Baud rate and / or station number setting error.