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Advanced Energy
Network Status (NET) LED
The NET bicolor (amber/green) LED is the network status LED and indicates the
status of the communication link.
unit status.
Table 4-10. Network status (NET) LED
LED Status
Off
Green (steady)
Green (flashing)
Amber (flashing)
Amber (steady)
Note: For further information on indicator flash rates, refer to the current DeviceNet
specification (available from the ODVA web site at: http://www.odva.org).
4-40
Table 4-10
describes the LED states and associated
Indication
No power
Unit is not on-line because:
• Unit has not completed the
• Unit is not receiving power (check
Link okay
Unit is on-line and allocated to the
master.
On-line, not
Unit is on-line but has no connections in
connected
its existing state because:
• Unit has not established
• Unit is not allocated to the master
Connection
One or more I/O connections are in the
time-out,
timed-out state.
critical link
failure
Critical link
Communication has failed (that is, the
failure
unit has detected an error that has made
it incapable of communicating on the
network).
If you have a unit configured with two
DeviceNet cards, the cause of this
failure may be:
• The two DeviceNet cards are not set
• The two DeviceNet cards have the
Communication Interfaces
Unit Status
Dup_MAC_ID test
the MOD LED)
connections to other nodes
to the same data rate as the network
same node address
5705211-C
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