08-16-2017, 10:30 PM
i know annunciator is a group of lights used as a central indicator of status of equipment or systems in an aircraft, industrial process, building or other installation. Usually the annunciator panel includes a main warning lamp or audible signal to draw the attention of operating personnel to the annunciator panel for abnormal events or conditions , but now you must listen the talk http://forums.mrplcindex.php?showtopic=19900 here a geek discussed it