Hi,

We have a redundant system with CPU 416h,this CPU programmed in simatic step 7 with lader language,now We want to add fail safe functions to programm ,Can We use S7 distributed safety or we have to use simatic S7 F system package,and it's functions.

If we have to use Simatic S7 F system package do need use cfc language or we can use lader language and save  side of old program.

Hello,

I think the following manuels could be helpful:

SIMATIC Industrial Software S7 Distributed Safety - configuring and programming

SIMATIC Industrial Software SIMATIC Safety - Configuring and Programming

Regards