Teledyne LeCroy Frontline DeviceNet-RAB Rockwell Allen-Bradley DeviceNet to USB Interface

The NetDecoder - DeviceNet analyzer provides a comprehensive troubleshooting and diagnostics solution for solving communication problems on DeviceNet networks.

The DeviceNet analyzer supports the following DeviceNet interface cards:

• Rockwell Automations 1784-U2DN USB interface
• Molex-SST's PCI and PCMCIA interfaces

The NetDecoder analyzer uses these cards as the sniffer interface into the DeviceNet network. The startup wizard provides the options to run the analyzer using any of these DeviceNet interfaces. The NetDecoder analyzer provides a wide range of features to simplify troubleshooting DeviceNet problems.

DeviceNet Capture Filters

The NetDecoder - DeviceNet analyzer using the SST interface cards provides the ability to set capture filters while sniffing data. This feature is very helpful for diagnosing DeviceNet problems because it provides the engineer with only the relevant data. Users can access the capture filters through the I/O settings menu.

The 'Capture Filter' tab has a toolbar with buttons to perform a common task such as Clear the current filter settings, Load a filter from disk, Save the current filter to disk, Open the Add Message dialog, Expand all nodes in the filter display and Collapse all nodes in the filter display.

The Filter Panel on the left displays the messages that are captured (or excluded) by the current filter.

To create a filter, first, choose which nodes to include in the filter in the Client MAC and Server MAC boxes.

Client MAC - When non-blank, messages associated with the client-side of a conversation are added for this MAC ID. When blank, no client-side messages are added.

Server MAC - When non-blank, messages associated with the server-side of a conversation are added for this MAC ID. When blank, no server-side messages are added. Example - To filter on all server-side messages from MAC ID 3, leave the Client MAC blank and put "3" in the Server Side box

Choose the messages to filter on by checking the boxes. When blank, all messages associated with the specified client and server MAC IDs are added to the filter. Enabling one or more checkboxes limits the messages added to specific connection types only.

Check the Exclude box to cause all messages except those listed in the filter panel to be captured.

Data that is filtered out using a capture filter cannot be recovered. Filtering is very helpful to weed out unwanted messages and isolate messages that cause trouble. The reduced traffic allows the network analyst to concentrate on thorny issues and thereby reduces debugging time.