Communication between Factory I/O S7-PLCSIM only works with a specific set of settings and a custom function.
Using Template Projects
We provide ready to use project templates at the S7-PLCSIM section of the manual.
You can also refer to a step-by-step guide on how to connect Factory I/O to S7-PLCSIM.
Creating a project from scratch
In case you need to create a new project from scratch the required settings are:
Add the communication FB from one of our template projects. Make sure it runs.
Set a minimum cycle time.
Make sure input addresses that will be used by Factory I/O are not assigned to any I/O module. Either by changing the IO addresses of the module:
Or by setting the module PI to none:
You should do this for every input module of the PLC, either digital or analog.