There are many ways to accomplish the goal of capturing data from a PLC onto a PC.

If you want to use JSON, you might consider looking at the OSCAT.de network library ( http://www.oscat.de/images/OSCATNetwork/oscat_netlib121_en.pdf documentation )

If you want fast, you might consider a custom VB/C# application to capture data via UDP

If you want reliable and pretty fast, a custom VB/C# application to capture data via TCP/IP

If you want not so fast and relatively open standard, OPC/UA with recent firmware revision

If you want it slow, you can do the datalog and scheduled CURL scripts method to log data that is polled and retrieved periodically.

GuidoF72

Goodmorning everyone,

I have a problem that bother me for several days. I would like to read the values directly from the plc to update my web page (too big to be incorporated as a user-defined web page).

So, I thought of having the plc create a JSON file to be able to read it later via an http call from my web page. All of this would be great if it didn't give me CORS issues.

Can you kindly give me some advice to be able to solve my problem without using any type of proxy (because I want to use this solution in production environment).

Thanks a lot in advance.

Have a nice day.

Guido.