hello,   

we have a plc  a 315  (or it could be a 317)   which just stopped during operating.  the plc is used en a 24/7 process and than one day we came to the site and the plc seemed to be "stucked" in stop,   lights on the plc were burning so power is oke,  but it didn't want to go back in run again.

i know the info is short and few,   but can anyone tel something about this

i don't know, plc is still at the site, external company replaced it with a new one.

but i will come back to that 

i got the plc here and i did some little experiments with it.

and i noticed that if i put power on it, it doesn't come to live immediately like it should be, after i reconnected power to it for some times all the leds light up for some seconds 

than a green led remains on for the power and the brown for stop is blinking second on/second off etc

i arranged an original siemens adapter to  and i tried to get online with it but so far with no succes tomorrow i will do some more attempts

Did u try to do memory reset via mem reset botton?

Do that and run plc ,sometimes it helps.