chart from values from iframe

[123fox]

I’m working on a project using a PLC controller that is monitoring a process. I have a HTML page now that refreshes itself and shows values of registers.

I am using: <iframe src=”readreg.htm;reg-R1;fmt-INT;rfs-5″>
</iframe>
The code above reads the value of register R1 from controller’s inner page readreg.htm, which I can’t see and enter (it’s hide somewhere). Iframe returns a value(number) but of course in frame. Iframe works fine.

I want to get the value from iframe (number from register) and put it into variable so I can create a chart.

I can’t use php, only javascript.
I’ve tried to do it for weeks but every solution doesn’t work. Hope you can help me.

[Indranil]

@123fox

Unless we look into your code, we can’t predict what to suggest for your project. Can you kindly create a sample project and share your code, so that we can look into it and help you out. Also this relevant topic from stack-overflow might help you.

——
Indranil Deo
Team CanvasJS

• This reply was modified 6 years, 7 months ago by Sanjoy.