Hello gentlemen,
I want to display an online chart via mapp view in order to visualise data (for example, the position of a motor shaft). My problem is as follows: data acquisition is not fast enough, or the mapp view display is not fast enough. I would like to increase it, but I don’t know where to configure this kind of thing.
I am using version AS 6.5.0.306, Mapp View 6.5.0, CPU 5PPC2200_AL18_000.
Do you have any ideas? Thank you in advance for your feedback.
Kind regards
Hi Clement,
you can edit the sampling rate in the mappviewcfg file for example.
Sampling rate (OPC UA)
It also depends on how many variables are shown in the Chart.
Maybe you can split them into more views.
Best regards,
Thomas
Hi
If I understand correctly, increasing the sampling rate will also reduce the performance of the HMI, correct?
How can I display an accurate graph of a motor’s position (for example) without reducing the performance of the HMI?
Best regards,
Clément
Hi Clement,
increasing the sampling rate could affect the performance of the HMI, that’s right.
However, if it’s just a few variables you want to display on the chart, the impact on the visualization could be relatively low.
You should test that to be sure.
Best regards,
Thomas
In your use case it prop. would make sense to look into OPC-UA HDA.
You can have OPC-UA monitor and record data of a node - it is possible to configure the sampling rate and the buffer. On the HMI side you can use OnlineChartHDA to visualise the data.
In this way you decouple the data acquisition and the visualisation of it … this way it should be possible to record the data in “real time” - while the visualisation remains “near realtime”, but efficient and it only needs to draw the latest data. OnlineChartHDA is also optimized to deal with a lot of data and handle it in an efficient way.
CHH