/guides/diagnostics.html Recent content in Diagnostics on Loupe Documentation Hugo -- gohugo.io en /guides/diagnostics/watch-windows-pvm.html Mon, 01 Jan 0001 00:00:00 +0000 /guides/diagnostics/watch-windows-pvm.html <p>A watch window (variable monitor) shows live process-variable values while you&rsquo;re connected to a PLC. Less obviously, <strong>saving a watch configuration also snapshots the current values</strong> — so a single <code>.pvm</code> file is both a reusable variable list <em>and</em> a machine-state capture you can archive, hand off, or diff offline. This guide covers saving a snapshot and analyzing it offline with a few small Python scripts.</p> <h2 id="objective">Objective</h2> <p>Save a watch window snapshot that captures live variable values, then search or diff those snapshots offline as JSON — with no live connection to the machine.</p>