Using the M-4oo controller is it possible to control feedrate by the keyboard while a program is running. I have seen the =+ and shift =+ but it doesn't do anything. Any suggestions

No.

The keyboard shortcuts are only available when using keyboard control with no jog panel installed (i.e. the "Console Type" selection on the Control Configuration screen is "Keyboard"). You can't select keyboard control without losing the use of your built-in jog panel.

I presume this is related to the keypad question: you are looking for a way to have remote feedrate override control, out of reach of the built-in jog panel.

Unfortunately, I don't think there is any good way to do that.

Best bet for solving both problems might be to buy the M39 pendant enclosure, cable, and internal plug pigtail so you can turn your built-in jog panel into a removable walkaround pendant.

- Marc