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Hello Dan,


In order for a button to 'latch' a bit, you must do so with the method you described above: on the positive transition of the button push, set another bit in the ladder.  Doing this directly from the button is not available as of now in the VisiLogic software, it is only available in the UniLogic software.

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 Would selecting the "toggle" function not do this for you? You would have to use a "Binary text/switch" function versus a standard button.

Creating a button with the toggle function ON would allow you to touch the button on the HMI once causing it's (MB) bit value to go high and remain high. Touching the same button after that would make the MB go to its low (OFF) state.



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