How can I detect if a global bolean variable has changed

I have a boolean global variable that change its value from time to time. At hte beginning of my program I take the actual time, but everytime this value change I have to reset this previous value and take the actual one. I've tried to do this with the event structure but it doesn't work because this is a global variable and not a control in the panel. Some idea to solve this problem? Thanks in advance,
Angel

It's mainly because you are reading value change events for the indicator, not the control. Value change events are only fired for changes given by a user. The indicator however is not updated by the GUI, but by programmatic input from the control. By replacing the reference with a reference to the control it will work. Or you can write the value to the indicator by using a Value (Signaling) property, that will trigger a change event for the indicator.
Note: You should not register the event inside the loop, do that only once - outside the loop.
If the boolean you are to monitor is not changed from the GUI you can as I mentioned above make it fire an event by setting the value using the value signalling property inst
ead of wiring the new value directly, but the property node has it's downsides so another option is to create a user event, put that reference in the global, and then run the generate user event function whenever the boolean changes.
I see you read the ms timer when the value changes. Why? If you want the time get the time, if you want the time since the last update you could use the ms timer, keep the previous value in a shift register and then calculate the difference, but the ms timer rolls over now and then so that can give false results...What is the purpose of the time and how often does the value change?
Attached is an exmaple that use a user event and the generate event function.
MTO
Attachments:
example_Rev3.llb ‏54 KB

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"Paul Cardinale" a écrit dans le message de
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> EMG wrote in message
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