SlimLine CODESYS Vs LogicLab in web access

[Anonimo]

I am a student currently building a fully programmable furnace controller with multi-point temperature measuring as a graduation project, it is intended for a steel hardening furnace. Your SlimLIne controllers seem to fit my needs exactly and I’m deciding if to choose the CODESYS or the LogicLab version. I’ve experience with the CODESYS environment, and I’ve already tested the LogicLab by using the simulator embedded on it (SimuLab).

The LogicLab programming itself works fine. I write most stuff in ST language, and my requirement is to create a simply web interface for setting and displaying temperatures and timers. I know that CODESYS is awesome doing just that! but I don’t know how is it possible to do the same by using LogicLab version.

How is it possible to display and set variables from web pages using the LogicLab version of SlimLine ? I do not see any smooth plugin to LogicLab doing that ?

[Sergio Bertana]

CODESYS and LogicLab are very similar in programs developing, mainly we suggest LogicLab due its cheaper costs (The CODESYS’s royalties are more expensive). About the features there is no great differences between the two environments, we develop functions and FBs mainly for LogicLab because it’s based on our proprietary operating system, so we obviously know it well than CODESYS and we can obtain the better results.

Sincerely CODESYS has the WebVisu facility that makes easy to create web pages and make possible to display and set program variables by using graphics objects. But unfortunately the WebVisu is based on Java and we have experienced some trouble with security. It’s difficult to display the page because the browser reports many security alerts and sometime (Specially on the smartphones) it’s not possible to display the page.

As you pointed out in the LogicLab at the moment there is not any facility to develop web pages, but it’s possible to design pages by using standard web editors. If in the source page special tags are written (They are written as HTM comment)  the SlimLine HTTP server when sends the page to the browser automatically changes the tags with the variable values (Here the manual abstract).

[Sergio Bertana]

More informations about web pages, in SlimLine LogicLab it’s possible to use AJAX or HTML5 to develop pages that are automatically updated, with AJAX and Javascript the update uses the standard HTTP instead of connection with a dedicated TCP port like the Java application used by CODESYS. So when you publish the SlimLine web pages, you have only to publish the HTPP port 80.

In this topic it’s possible to find a web page with some standard HTML objects, in this topic an example on how to use AJAX to automatically update pages. This is a screenshot of a web page we use internally to our company to set the climatization time table and this is the source page.

If the browser that display the SlimLine web pages can access to Internet it’s possible to use the Google charts objects to make the pages more impressive (See the screenshot), in this topic we treat the argument.

[Autore]

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