Making a network of different siemens logos with at every station an HMI (ktp400) and a Logo. When activated for oil deliver a digital output will also be activated. 

At the main Logo, all the digital inputs (preferably minimal 12), will get high according to the number of stations activated. 

I want to add the number of digital inputs, and with 0 active, 0 output, 1 or 2 active will switch output 1 (pump), 3 will activate output 2. 4 and 5 activated will activate output 3. 

Is this possible?

In this way, it is possible.

Regards, Quirin