Devicenet network status led states, Module status led states – Rockwell Automation 1336-GM6 Enhanced DeviceNet Communications Module User Manual
Page 84

8-2
Troubleshooting
DeviceNet Network Status LED
States
The LED closest to the DeviceNet connector is the DeviceNet Status
LED, labeled “NET.” It functions as follows:
Module Status LED States
The middle LED, labeled “MOD,” is the Module Status LED. It
indicates the operation of the Enhanced DeviceNet adapter and
functions as follows:
LED Viewed:
If:
State:
Indicates
Action:
Network
Status LED
LED is off
Not powered/Not
online
No power/Duplicate ID
not completed
1. Verify that the network supply is connected and that
power is reaching the adapter through the connector.
2. Make sure one or more nodes are communicating on
the network.
3. Make sure at least one other node on the network is
operational at the same time and data rate as the
adapter.
LED is flashing
green
Online/Not connected
Passed duplicate
ID/No connection
established
No action needed. The LED is flashing to signify that
there are no open communication connections between
the adapter and any other device. Any connection (I/O or
explicit message) made to the adapter over DeviceNet
will cause the LED to stop flashing and remain steady on
for the duration of any open connection.
LED is steady green
Online/Connected
One or more
connections
established
No action needed.
LED is flashing red
Online/Time-out
I/O connection timed
out
1. Bring controller back onto the network.
2. Reduce traffic or errors on the network so that
messages can get through within the necessary time
frame.
LED is steady red
Network failure
Failed Duplicate ID or
Bus-off
1. Ensure that all nodes have unique addresses.
2. If all node addresses are unique, examine network for
correct media installation.
LED Viewed:
If:
State:
Indicates:
Action:
Module
Status LED
LED is off
Not powered
No power
Ensure that the connected SCANport product is
powered and connected to the adapter.
LED is flashing
green
Waiting for I/O data
Normal operation —
No I/O, or PLC in
program
No action needed. Adapter has passed all operational
tests and is waiting to pass I/O data between the
DeviceNet and SCANport interfaces.
LED is solid green
Operational
Normal operation —
I/O operational
No action needed.
LED is flashing red
Configuration
problem
Bad CRC of Adapter
parameters or flash
program
1. Power cycle the adapter to reset it.
2. Enable an adapter reset via the adapter’s
configuration parameter.
3. Re-flash the adapter.
LED is steady red
Hardware failure
Failed internal or
external RAM test
Replace unit.