How can I put min/max limit lines to my trend?

Hello

I have several trends in my WinCC Unified project, where I visualize process values of our production machines. Our production is asking me to show min/max limit lines for the trends, so that they can understand if the trend curve is within the tolerances or not.

In WinCC Advanced it was possible to draw such limit lines, but I cannot understand why WinCC Unified still has not a solution for that. I hoped that in V18 this issue would be fixed, but still I cannot find a property for that.

Has anyone a suggestion or workaround for that?

Hello mdarende,

SIMATIC HMI WinCC Unified Engineering V18

Hi,

if your limit is a tag then you can display dinamically the tag of the limit, having a straight line unless the limit is changed, thus making a step.

Hi

The limit value is adjustable by the operator. But nevertheless I have currently done in this way. I have programmed a script for changing the position of the line regarding the entered limit value. But this is realy a bad solution. Depending on the browser type and so on the line is not located always on the right place. And if you vant to zoom the chart or maximize you have to care for that also.

Really cannot understand why this option is still not integrated in V18. I have asked this direct to the developement team but I think there is a problem in doing that.

 Please report their feedback after, it may be helpful to many in the future.

Thank you,

BE

mdarende

Hi

The limit value is adjustable by the operator. But nevertheless I have currently done in this way. I have programmed a script for changing the position of the line regarding the entered limit value. But this is realy a bad solution. Depending on the browser type and so on the line is not located always on the right place. And if you vant to zoom the chart or maximize you have to care for that also.

Really cannot understand why this option is still not integrated in V18. I have asked this direct to the developement team but I think there is a problem in doing that.