Home in the upper right?

[Telrad]

In the last 2 days I have succesfully wired up the motors, power and the only limit switches that came with an old Taiwanese laser engraver. One of the problems I am facing is that the home switches are in the upper right corner on the machine. How do I set the controller to hit the limits in the upper right corner when I set the controller to home onPower?

I have tried setting the workspace with the settings in the attached image but it doesn't work.

Can it be done?

[Telrad]

I solved my own problem.... I had to switch the Datum setting to Positive.