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Malcolm

Complex Web Server Trends

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Hi,

We never did it before - and it seems to be not an easy task to accomplish.

For displaying trends you will need the parameters (time and values) from the PLC - so you will need keep those values in DT and then read it back to operands.

Then probably using javascript there is option to draw a graph.

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Hi guys,

Is it possible to have trends on a complex web server?

I think it is possible with javascript AJAX code and new HTML5 element <canvas> - but only for modern browsers which supports it (IE8 (not sure), Firefox, ...

Currently I'm planning to do this if I get over some serious bugs on current version of web server

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