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SOLVED

Trend Display

giustola69
Long-established Member

Trend Display

Hello,

I could not get the trend display object running. No trace is visible on the trend display object.

You have the 2 project files attached. the test_trend.zip file has only the trend object inside, while the other file uses other objets too.

Please could you help me to understand what's wrong in my project?

Many Thanks

Giuseppe

 

6 REPLIES 6
LunatiX
Long-established Member

Re: Trend Display

webiq-eg
Long-established Member

Re: Trend Display

I can reproduce the error but I did not find the reason. I gave it to our development and will come back to it.
Regards
webiq-eg

giustola69
Long-established Member

Re: Trend Display

Hi,

I check again and I found this behaivior: using the localhost server the trend function works but if I use the server inside CtrlX ( the app ) it doesn't work usingi the same variable "SinVar" which is an internal var. But also using a var coming from the PLC it doesn't work either

giustola69_1-1648459981658.png

Please let me know if you find something that make it works even when connected to the real CtrlX control.

P.S.: On thursday I should be at the customer to show him our it WebIQ works. It could be very pleasent if we can find the solution before

Many Thanks

Giuseppe

 

 

webiq-sk
Occasional Contributor

Re: Trend Display

I see two issues with the test_trend.zip app:

1. The Trend Display widget is referencing a non-existing item "TestTrendInternal"
2. The item "iTestTrend" has no minimum and maximum values set in WebIQ and as such will never show the corresponding curve unless these values have been set.

giustola69
Long-established Member

Re: Trend Display

Hello,

 

The project you checked is old and incorrect. You should see the last comment I wrote which is based on a correct project ( at least for want I undestood it must be done ) which is attached to this comment.

In this last project as I worte in the previous comment I used a internal variable and the trend function works when I start the designer in localhost mode buy doesnot work if I start the designer on the CtrlX IP address ( see previous comment )

Please can you a a look at the last project and at the last post and give me some tips about how to make the trend function works ?

Many thanks

Giuseppe

 

webiq-eg
Long-established Member

Re: Trend Display

Hi there,
I have now taken a closer look at the recorder and trend functionality. It also runs on my ctrlX Core via OPC-UA as well as via the internal variable server.
The following problem: As soon as a single process item is not available in the trend or is of type 'bool' or 'string', the entire trend is not displayed. Furthermore, min and max limits must always be specified, either as input/display limits or as trend limits. But you did it correctly.

webiqeg_0-1648712781157.pngwebiqeg_1-1648712817708.png

 

Try these tips, preferably with a single item of type 'float' or 'int' in the recorder and try to display the trend, then it should work.

Otherwise send me a private message and we can arrange an online session.
Many greetings
webiq-eg

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