In our factory, there are lots of MM440 and some of them communicate via profibus with cpu and the others are not in communicate, they are drived with terminal inputs.

    We want to backup driver`s parameters and when we connect to MM440 which is not in profibus communication, we are succussed to get online and backup. But, when we try to connect MM440 with profibus with the same cable and fixing, we are not successed to get online and backup, Siemens starter program does not find any drivers. I tried with different band rate, as also when i try to make band rate test, it`s fail.

    What could be the problem with driver in profibus for connect to pc?