A programmable monitor system and method.

摘要

A programmable monitoring unit which is adapted for simplifying the programming and display of user programs in a programmable controller using a sequential function charting technique. In a first embodiment, the display of the SFC data is easily compressed such that a combined display element chart is accessed by inputting a first and then a second display element whereby a combined element representing the first and second inputs are displayed in a single display area. In a second embodiment, the present invention provides a means for readily displaying the functional status and changes of transactions based on a program's operational cycles in order to facilitate the debugging of the program.