# Testing your Madge Ringnode using the diagnostics program, DIAG

The diagnostics program tests that your Madge Ringnode is working correctly. It shows you the configuration of your Ringnode, including the amount of on-board RAM and the data transfer mode the Ringnode uses. Run the diagnostics program every time you install a new Ringnode or change the computer's hardware configuration.

Starting the diagnostics program

Using the diagnostics program

Testing a Ringnode

When diagnostics is finished

Using the command-line parameters

Troubleshooting