56
• Fieldbus Coupler/Controller
Fieldbus Coupler 750-306
WAGO-I/O-SYSTEM 750
DeviceNet
3.1.8 LED Display
The Coupler possesses several LEDs for on site display of the Coupler oper-
ating status or the complete node.
24V 0V
01 02
OVERFL
RUN
BUS OFF
DeviceNet
C
D
B
A
CONNECT
NS
MS
C
A
I/O
Fig. 3-18: Display elements 750-306
g030602x
The module status (MS) and the network status (NS) can be displayed by the
top 4 LED’s. They react as described in the table.
Module status (MS)
OVERFL
(red)
RUN
(green)
State of device
Meaning
off
off
no power
No power supply to the device.
off
on
device operational
The device operates correctly.
off
blinking
device in standby
The device needs to be configured or has been partly
configured.
blinking
off
minor fault
A minor fault has occurred. It exists a diagnostics.
on
off
unrecoverable fault
The device is defective, needs to be serviced or
replaced.
blinking
blinking
device self testing
The device performs a built-in check.
Table 3-1: Fault and status displays: MS
Network status (NS)
BUSOFF
(red)
CONNECT
(green)
State of device
Meaning
off
off
not powered, not online
No power supply to the device / fieldbus supply /
DeviceNet cable not connected and „Duplicate MAC
ID detection“ is not yet completed.
off
blinking
online, not connected
The device operates correctly at the fieldbus. How-
ever, it has not yet been integrated by a scanner.
off
on
link ok online, connec-
ted
The device operates correctly at the fieldbus. At
least one connection to another device has been
established.
blinking
off
connection time out
A minor fault has occurred (e.g. EPR is unequal 0
during a polling connection, slave is not polled any
longer).
on
off
critical link failure
The device has detected a fault (duplicated MAC ID
check error). It is unable to perform any more func-
tions in the network.
Table 3-2: Fault and status displays: NS