Rockwell Automation DeviceNet Media Design Installation Guide - Manual (Page 105)

1 Publication DNET-UM072C-EN-P - July 2004
Chapter
5
Correct and Prevent Network Problems
Use this chapter if you are experiencing problems with network operation.
In this chapter, we tell you how to locate and correct problems associated with
improper system design.
General Troubleshooting
Tips Observe the following general tips when troubleshooting your DeviceNet
network.
Distinguish, as soon as possible, a device problem from a media
problem.
Try to isolate the problem by removing nodes, drop lines, taps, or
trunk lines.
Use RSNetWorx for DeviceNet software and the 1770-KFD or
1784-PCD communication interfaces to identify the functioning
nodes on the network.
Refer to the documentation that shipped with your DeviceNet
scanner for an explanation of DeviceNet scanner status/error
codes.
Refer to the documentation shipped with your DeviceNet-enabled
device for an explanation of the device’s network LED.
When troubleshooting a particular portion of the network, you can
substitute known good devices, cables, connectors, etc. for bad
ones until you isolate the problem.
If you suspect a media problem, always inspect the media first.
Verify lengths, topology, and proper termination.
ATTENTION
Verify that all devices on the network have been certified by
the Open DeviceNet Vendor Association (ODVA), and
carry the DeviceNet Conformance Check on their
nameplate.