If I understand correctly you want to detect three dry contacts with one single input. You could do it with three resistors wired like so or in parallel as you suggest.
Set the range to a custom range like the potentiometer example above then write a program to detect the current reading and convert that into three discreet states.
10 IF SWITCH1 <= 100 THEN VAR1 = 1
20 IF SWITCH1 >= 101 AND SWITCH1 < 200 THEN VAR1 = 2
30 IF SWITCH1 >= 201 THEN VAR1 = 3
Use the new multi-state variables to store the state of the three position switch in VAR1. You can insert this variable on the graphics displays and see the state of the hand-off-auto switch there as well.
For bonus points: Create a different icon for each state, we’ll need to work on the T3000 interface a bit to enable this but its on the todo list.
