Yaskawa SmartTrac DeviceNet Card - Manual (Page 25)

SMART TRAC DeviceNet Card
Technical Manual 3554-0070 Testing Card Installation
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Network Status (NS) LED: A two-color LED indicates network
communications status. When solid GREEN, it indicates that it is
online and connected to other devices. When flashing GREEN, it
indicates it is online but has not established a network I/O connection.
When solid RED, it indicates that it has not established a network I/O
connection, possibly because a duplicate MAC ID was detected, a bus-
off conditions exists, or a communications failure. When flashing RED,
the connection has timed out.
Table 4. Interpretation of the Network Status Indicator.
Network Status (NS) Indicator LED
LED State Device State Description
OFF Off-line or not
powered up Off-line:
Device has not completed the
duplicated MAC ID (node
address) check.
Device may not be powered.
Check Module Status LED.
Flashing GREEN On-line and NOT
connected On-line, but has no connections
in established state:
Device passed the duplicate
MAC ID (node address) check,
but has no established
connections to other nodes.
Solid GREEN On-line and
connected On-line and has connections in
established state.
Flashing RED Connection Time-Out One or more of the I/O
Connections are in the Timed-
out state. The Smart Trac AC1
has probably stopped polling
slave devices.
Solid RED Critical Link Failure Failed communication device.
An error has been detected that
has rendered the device
incapable of communicating on
the network.
A duplicate MAC ID (node
address) error was detected.
A bus-off condition exists.
Flash rate for LED is approximately 1 flash per second: ON for approximately 0.5
second, then OFF for approximately 0.5 second.