This article is part of the Queued Message Handling series. Refer to the Queued Message Handling (QMH) overview documentation for general information on the QMH architecture.
A message diagram is the subdiagram of a Case structure, located in a Message Handling Loop, that handles a particular message. It is similar to a state in a state machine.
The message diagram uses a string selector and executes when the MHL receives a message that matches this label.
This tutorial utilizes the Queued Message Handler LabVIEW template. This an advanced LabVIEW architecture and this tutorial assumes knowledge with basic programming practices. In this tutorial, you will add a message diagram to the template to receive messages and execute code based on messages received.