66 • Fieldbus Coupler 750-337, 750-338
LED
Display
WAGO-I/O-SYSTEM
750
CANopen
3.1.7.1 Fieldbus Status
The upper four LED´s (STOP, RUN, Tx- und Rx-Overflow) signal the operat-
ing conditions of the CAN communication.
STOP
RUN
TXOVERF
RXOVERF
Meaning
Remedy
OFF OFF OFF OFF No
function
or
self-
test
check supply
(24V and 0V),
wait for self-test
OFF SLOW
FLASHING
X
X
Module is in the
state PRE-
OPERATIONAL
OFF
ON
X
X
Module is in the
state
OPERATIONAL
ON
OFF
X
X
Module is in the
STOP state or fatal
fieldbus independent
error (i.e. a module
was removed),
incorrect configura-
tion
Check in the event
of a fieldbus inde-
pendent error, reset
the node, check
same in the event of
a configuration error
X X X ON
CAN
receiver
buffer
is full. Data loss is
likely.
Increase the time
span between 2
protocols.
X X ON
X CAN
transmitter
buffer is full. Data
loss is likely.
Check the data sizes
of the bus system.
Increase the transmit
priority of the
module.
X X FAST
FLASHING
in turns with
RXOVERF
FAST
FLASHING
in turns with
TXOVERF
CAN Controller
exceeded the Warn-
ing Level, to many
error messages
Check baud rate and
bus connection,
install min. 2 mod-
ules in the network.
OFF FAST
FLASHING
X
X
Module is in the
state PRE-
OPERATIONAL,
Sync/Guard Mes-
sage/Heartbeat failed
Change into the state
OPERATIONAL
and restart
Sync/Guard mes-
sage/Heartbeat
FAST
FLASHING
FAST
FLASHING
X
X
Module is in the
state
OPERATIONAL,
Sync/Guard Mes-
sage/Heartbeat failed
Restart Sync/Guard
message/Heartbeat
FAST
FLASHING
OFF
X
X
Module is in the
state STOP,
Sync/Guard Mes-
sage/Heartbeat failed
Change into the state
OPERATIONAL
and restart
Sync/Guard mes-
sage/Heartbeat
