AdvancedHMI as Soft-PLC

[kallileo]

I was wondering how it's possible to use AdvancedHMI as Soft PLC.
I understand all the real-time restrictions of the OS and the whole setup but for test purposes and non critical applications it could work.

Lets assume that it's acceptable so I guess that a separate thread should be created in order to run the control code.
Has anyone done it before?

[Archie]

I have only done this one time at the customer's insistence, but I advise against it. The technique I used was with a serial IO block that used a custom protocol. Basically it would send the outputs, then the IO would respond with the values from the inputs. This would then trigger the next request cycle. I created a custom class that had an InputsChanged Event and properties for the outputs.