Well, trying to port over the plugin I did for Pete's MP-03 modbus pendant to a wxLua Wizard and screen integration for Mach4.
It can do:
MPG, Cycle Start, Estop, FSOVR, Spindle On/Off via buttons, and
27 control functions via Soft buttons, that the user can custom assign,
Plus fire off 15 macros (user or OEM), and optionally map inputs to screenset "Leds" for monitoring or other purposes.
see screen shots of wxLua Pendant config notebook.
Scott