Thanks for the feedback. I suggested the tablet route to the customer, and he said no thanks. He wants something more rugged, and considering the plant he's probably right.
The pendant is only going to be used for setup. I could just use a standard crane pendant. The operator would select the axis on the fixed HMI, walk over to the axis and use the pendant to put it at the right spot, then go back to the HMI and select the next axis. I could even use another pendant button to increment. The only reason I wanted an HMI was to make it easier to select an axis, and give feedback as to which axis is selected.
How many axis?
could you use a rotating selector or thumbwheel for the axis selection on the pendant then add the movement pushbuttons?