4 Nos User Interface touch screens - One PC running LV

[MogaRaghu]

I have a test equipment that has four stations and each equipped with a Touchscreen user interface ( see image ) .  All four of these will be connected to a Ethernet switch and that in turn connects to the PC. 

I need to be able to serve different images in each station as required and then exchange data - Test data to the Touch Screen from LV code (red dots ) and Push Button Data  form Touch Screen to LV code (green dots ). 

So far have not done anything on the Ethernet comm and hence wanted to know if my approach is right and possible ? 

[santo_13]

Tell us more about these touch screens, model etc.,

[GerdW]

Hi Raghunathan,

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@MogaRaghu wrote:

I need to be able to serve different images in each station as required and then exchange data - Test data to the Touch Screen from LV code (red dots ) and Push Button Data  form Touch Screen to LV code (green dots ). 

So far have not done anything on the Ethernet comm and hence wanted to know if my approach is right and possible ? 

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Yes, this is doable!

Think about how any web server providing a website is working: many users ("clients) can contact the website ("server") and request to visit a certain website. Each client can request it's own website and is served by the server…

You need to implement a similar scheme with your 4 stations ("clients") and your one PC ("server")!

[MogaRaghu · Accepted solution]

Problem solved. 

I located a 7" Nextion display which takes simple RS232 commands !! And I have created a LV code to send and receive data to the display. https://nextion.tech/

I think this must be the most simple interface for a display of this size and performance !!  

For sending data to the pre-formatted fields on the display you just send the param ( string / int etc ) in a particular format as defined by the instruction set. And to receive data from Buttons its even simpler - just enter the required Hex code in the Button click event on the display !! 

Ok the catch is this -- while you can easily send data to the existing fields and receive data from buttons, none of these can be created at Run time.  So in that sense it is NOT like a web server but typically Industrial Control applications do not need such a functionality - its enough if the UI is created and you only update values in run time. 

[santo_13]

Looks like they have a good portfolio and are professionally made.