User manual

Publication 1734-UM015A-EN-E - November 2009
88 Troubleshooting
Troubleshooting Scenarios
The following are scenarios you may encounter while using the modules.
Peer connection is not working
If the Network Status LED is flashing red, one or more connections to the
device are broken or not functioning properly. If the device has been
configured to consume data from peers, it is possible that the data size or data
rate have not been configured correctly.
• Use the Peer Missing bits in the I/O assembly to check which peer
connection is missing.
• Verify the configuration is correct. Upload from the module into
RSNetWorx for DeviceNet.
• Verify the Node number or Slot number is correct.
• Verify the connection size is correct.
• Increase the EPR (Expected Packet Rate).
• Verify that the owner of the connection to the peer (usually a scanner or
controller) is receiving data. The DeviceLogix module cannot make a
connection to a peer; it can only listen to COS (Change-of-State) I/O
data going from the peer to the master.