WAGO-I/O-SYSTEM 750
Diagnostics 97
750-325 CC-Link Fieldbus Coupler
Manual
Version 2.0.1
9.1.1
Evaluating Fieldbus Status
The CC-Link status is displayed by the top LED group (‘L RUN’, ‘L ERR’, ‘SD’
and ‘RD’).
Table 53: Fieldbus Diagnostics
LED Status
Operation
L RUN
L ERR
SD
RD
ON
BLINK
BLINK
ON
Communicating normally, but CRC errors
have been detected due to noise.
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 master.
OFF
BLINK
BLINK
ON
The fieldbus coupler receives a signal from
the master, but a CRC error is detected.
OFF
BLINK
OFF
ON
Data for the master caused a CRC error.
OFF
OFF
BLINK
ON
Link with master is not established. The
configuration of the fieldbus coupler
regarding to the station address and / or
number of occupied stations does not match
the configuration in the master.
OFF
OFF
OFF
ON
Either no data for the master or unable to
receive the data for the master due to noise.
OFF
OFF
OFF
OFF
No communication between master and
fieldbus coupler possible, either no master
available or master not available, e.g. due to
wire breakage.
OFF
ON
OFF
OFF
Invalid switch position for rotary encoder
switches or DIP switches.