Maj. Toxido
Member
I have a problem with the S7-CPU 315 plcs. Last 2 weeks (saturday)we shutdown one of our production line for maintenance purpose. When we resume the operation in tuesday morning the PLC`s CPU give an alarm of "SF" I reset the CPU everything is fine. We shutdown the machine again on saturday. When we start the PLC again CPU give an alarm "SF" again, tried to do the same thing last week but upon resetting the CPU the "SF" alarm lit again. Checking the process system I found out that the program of all recipe is been erase and there is no communication from IM365 to process computer. Checking the problem on-line I found out that all program is erase, but the CPU has an EPROM how it is possible!. When I remove the EPROM module to the CPU and reset it the "SF" light won`t lit anymore, but when I put now the EPROM card again th SF fault is now occured.
My question is thus my EPROM CARD is the one that have a problem or my CPU`s?
I try to download the the program with out the EPROM, only 47% goes to the CPU and the downloading is stop. I try to download it with the memory card attached but same problem occured.
I just wait for the spare CPU to arrive and to see what is the main problem.
My question is thus my EPROM CARD is the one that have a problem or my CPU`s?
I try to download the the program with out the EPROM, only 47% goes to the CPU and the downloading is stop. I try to download it with the memory card attached but same problem occured.
I just wait for the spare CPU to arrive and to see what is the main problem.