Board Thread:Questions and Answers/@comment-62.198.158.42-20130206092327/@comment-4787191-20130219035606

Watch a little tekkit with duncan about doors unless you have some knowledge. You need to copy the setup he made with the cpu, the have the bundled cable leading out, with insulated cables of 2 different colours going to motor powing the upward motion, and the one going down. If you are going to do it with computer craft, it will be a bit tedious. However, only you would know the password.

HOWEVER, I would suggest a simpler system using buttons and a counter, If you factory floors have the same ceiling height per level, you could have it stop at every level. Simply place two buttons on the wall, insulate the cables on the other side with difference colours if you want, I suggest so. Each wire would lead up to a seperate counter, with the tick pulse set to match the building floor height. Then finally the counter would lead up to to frame motor.

I think that my other suggestion would be better than your project, since it's easiar :P