Okay. Tahts correct i think. I programmed Siemens and Mitsubishi controllers both in their own software. Now i need to make them both work together, like Siemens is slave controller and Mitsubishi is master controller. How and what program/software i need to use to make them work with each other? I know that easier would be use same brand controllers, but right now i need solution for this situation. Got any ideas ? I have heard that there is some software/program to make them compatible. I was hoping you would know about this. Best Regards.