_PI command and _GO command

I am using am RC pulse in for the motor command in a closed loop position tracking setup. I can read the _PI value and it matches the Pulse In for Pin1 in the RUN Page of the software. I want to replace the pulse Pin1 value with a known value if the real value from the RC receiver is out of range.

Will the _GO command work to override the pulse in value to make the motor go to a known safe position?

Is there a command that I can use to override the current _PI value when the real value is out of its limits?