Hai every body,

i am using S7-400H sysstem with CPU 412-5H. the problem is rack 0 and rack 1 working properly . but redundancy fault alarms showing in Readsystem status. actually cpu leds are normal. 

And also if i switch of rack 0 cpu it changes to rack 1 but i cannot go to online. and not able to connect HMI.

please suggest me. i tried every thing MRES and downloadig.

thanks & Regards,

Y S Reddy. 

------------------------------------------------------------------------------------------
Split from Redundancy not working.