I am a bit of  a novice as far as the Siemens LOGO PLC without display is concerned; could somebody help with the following please:

I have been given on memory stick several files, at least one of which is needed in order for a piece of equipment to operate correctly, the problem is that I don't know if i need just one of them or all of them; they are named as follows:

Circuit Diagram1.lsc

Project.mnp

XXX.lsc

XXXX-Copy.lsc

XXXX_v81.lsc

I have currently transferred all of these onto an SD card, inserted it into the PLC, but it does not go into run mode, the LED remains red; am i confusing it with too many programs.

Please note that this is a stand alone item, with just the one PLC plus an expansion module, it does not attach to a network.

Any help/guidance would be much appreciated.