The HW_PSWTICH command takes a list of trigger positions and loads them into a hardware buffer in the FPGA. This is done individually for each axis.

In a Cartesian system, there is a need for accurate outputs to be triggered based on the XY position of a pair of axes instead of separate outputs for X and Y.

This document describes the functions of the MC405 FPGA which includes an XY mode for HW_PSWITCH.