Tia Portal V14 Real time graph

[dipen_95]

I current have 2 variable: Displacement vs Pressure. I need to draw a real time graph on Comfort Panel. The problem with using just f(x) trend is that the minimum time between updating a point is 0.5 sec and that is for ever in my application as the whole cycle last only 5 sec and I have to plot 500 points in that time.

Is there a way to do real time graph using Historical data without any time delay. If anybody can guide me through any sample program or material would e helpful.

Thanks

[Bryll]

I would use the PLC memory to store your samples since you want a resolution ten times better than the update rate between the panel and PLC.

Use a time delayed interrupt to store your samples.

[dipen_95]

Thanks for the reply.

Now storing the sample is not a problem. I can store all the values I get in my auto cycle time inside the PLC. But when it comes to drawing a X vs Y trend on screen there is where the issue is.

I cannot draw in Real time so is there a way I can draw from an Array instead of just a variable.

[Bryll]

I'm not sure, but it might be possible to use the "f(x) trend view".