Dear everyone.

I am working on a WinCC Advanced program that displays 18 temperature measurement points and setpoints for each point. The X axis is 1 to 18, and the Y axis is the temperature of each measurement point. I refer to the example:

https://support.industry.siemens.com/cs/document/109481693/creating-an-f(x)-trend-view-for-comfort-panels-and-wincc-runtime-advanced?dti=0&lc=en-VN

My program will call VBScript (attached) to save the values ​​to SQL database and display the trend of the measurement value and setpoint on the same graph, every 5 seconds.

However, sometimes I lose data when saving to SQL, leading to an error in displaying the trend (as shown in the picture). According to my observation, this phenomenon (maybe) is cyclical. I also tried increasing the VBScript call time to 10 seconds but the error still occurs.

I hope to get everyone's help.

Thanks so much.