[Alan Anderson]

When you supply two numbers to a solenoid initialization, the first one specifies the module number and the second one specifies the output pin number. There are eight slots in the FRC-cRIO chassis. Slots 1 and 2 support analog input modules. Slots 4 and 6 support digital I/O modules. Slots 7 and 8 support digital sourcing modules, which are used to control solenoids. Each solenoid breakout has eight outputs, numbered 1-8 (though the eight green LEDs on the module are actually labeled 0-7, giving a potential cause for confusion).

s1(8,1) defines the solenoid object as being associated with pin 1 of the pneumatics breakout connected to a digital sourcing module in slot 8 of the cRIO.

s1(8,2) defines the solenoid object as being associated with pin 2 of the pneumatics breakout connected to a digital sourcing module in slot 8 of the cRIO.