Post screenshots of the before and after logic; describe which S7-1200 Firmware, and what TIA Portal version.  Then we might have some ideas.

Djordje992

Hi Everyone,

I have a problem with Load Memory, the problem is actually Load Memory is 92% free, and everything works fine. But somehow when I change for exp. add NO contact and do download Load Memory changes immediately form 92% to 52% free, and then on Runtime update time is more than 10 seconds and very often losing communication between PLC and Runtime (SCADA). PLC is much slower. It already happens to me twice. Any suggestion?

Are you asking for help with VM performance, simulation compared to physical PLC differences, or why the simulation differs depending on what you change in the PLC logic and then perform incremental updates - rather than completely fresh downloads?

As for archive/retrieval, the archive option allows for a smaller archive size which forces TIA Portal to reconstruct several things during the retrieval and use of the project - like cross-reference / search indexing as one example.

Djordje992

And on my VM I running program using Simulation.