hi everybody
i have a simatic S7-313C plc V 2.6
and i write a program, when i download this program ( the ladder logic) this massage appear which is " unable to copy OB1 "
so what is this problem?
and how can i solve it?
plz tell me
Can you download other blocks? I know this may sound obvious but has the cpu got a memory card it it or if it's an older model, is the switch in "Run-P"?