Default Warnings
PlaneMaker's Standard > Systems > Warnings Tab is used to configure which individual warnings can trigger the Master CAUTION and WARNING annunciators. Individual warnings each have their own boolean (0/1) dataref contained in the sim/cockpit2/annunciator/..... class of datarefs, and when these dataref values go from 0 to 1, then the individual annunciator is triggered and if enabled above, can also trigger the master caution or warning annunciator.
You may, optionally, select a WAV file to play whenever an individual annunciator is triggered. This option is only available if you are not disabling legacy alert sounds via an FMOD *.SND file.
Trigger criteria for individual warnings are not specified in a single location for all parameters listed here. Some trigger criteria are internal to X-Plane, others based on certain PlaneMaker parameters, others on failure datarefs, and others still based on Limits set on the Limits Tab.