Float switch must be different than Z home switch?

I have a floating head and it is working properly with the home offset configured and such.  I thought I was ready to go through the PlamsaC config and everything in the docs made sense but once completed it gave me an error when I tried to launch saying my Z input was already used for home/limit.  It would seem to be redundant to put another switch on the Z axis

Mesa 7i96
Thcad-5
PrimeWeld cut60

 

Thank you for the reply. I would really like to get it running and then I can make revisions later. The way I built the floating mechanism will require a design change to add a second switch. Can you help me with the syntax to do immediate Z homing? I'm assuming it's a change to the HAL file?

Here is some pictures and a quick video of where I'm at with it.  I've been stuck at this point for two days now trying to get the PlasmaC GUI to launch!

Did you see the picture of my torch mount and the switch inside it?

I understand now. Thank you for your patience! So basically what I built is a float switch and I need to add a home/limit switch.