Hi
We are facing a problem in a machine sm74-4( cp2000) year 2003
during running machine suddenly stop and give the error of SEK .( Dyn error Sek1 -ffbf)
In dig.input-out / SEK all input goes zero .
we had check teh SEK/ Nt85/Sak/ found working on other machine .
some time it gives the dyn...