Changing and writing a variable via global script

This value will be used to rotate an object periodically. It's assigned to "Rotation - angle" property.

To do this, I decided to work with Global scripts (according to the recommendation not to use dynamization scripts inside screen objects).

This is what I wrote:

Unfortunately I can't get Angulo_Ventilador2 value to change. I tried with both Tags.Write and SerTagValue, also, with "=" instead of "==".

Maybe my issue is too specific for the scope of this subforum, anyway, do you have any suggestions to give me?

Thanks in advance!

Stefan Arcularius

Hi F a r i,

A possible reason for not being able to write HMI tags in a scheduled task would be using the local session scope for the tags. So knowing more about your HMI tags and your system in general would help us.

You are right, from a performance point of view it is not recommended to use scripts for dynamization. You should use tags or expressions instead. Using a script in a scheduled task to write a tag for dynamization will probably result in worse performance.

Kind regards
Stefan

 Hi Stefan, thanks for your reply.

I'm using both connection and internal tags. Contactor is to check my motor is turned on, and Angulo's purpose is to make a svg file rotate (if I change it manually, it works, since it's associated to rotation - angle property).

These are both system tags. I'm using V19 Up2 for this project, and the device is a Comfort Unified Panel (in case I haven't specified it yet, I don't remember honestly). Neither download or simulation work.

At first glance I don't know how I could use Expressions for this dynamization: I've always used it for conditionals "if this and that happens, you do this" but in this case I would have to jump through those conditions (do this, wait, do that, wait).

Can I code inside them? As far as I remember, I can only use logic gates AND, OR, (...), math operators +, %, (...) and relational operators &&, =!, (...).

At this point, best solution will probably be creating a "clock" variable inside PLC and use a PowerTag (I only have 95%+ of them available haha).

Thanks for your suggestion!

I am keeping my eye on using an animated GIF. But we are not using Unified yet. The following link may be useful to you: Add animation to WinCC Unified 

--

Murof

Hello F a r i

Using a Timer in Javascript could also be an option for animations or periodical actions you want to start and stop. But this I would use in Screen context

Bye Murof

@Murof: As related to this topic --
Where can we find out more about using timers in the Unified environment? Will it work on Basic panels also?