Fieldbus Status - WAGO -I/O-SYSTEM 750 Technical Description

66 • Fieldbus Coupler 750-337, 750-338
LED Display

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