Hi, I have a simple question. 

I have the M-duino 21+ Ethernet PLC. I want to use one of it's input as a voltage sensor. My question is, how do the pins written on the PLC corrospond to the pins I declare in my code. 

The pins on one side of the PLC are labels 0.1, 0.2, 0.3, ... etc. Do I declare these pins by using pinMode(1, INPUT) ...or pinMode(0.1, Input). 

Thanks