edf8e16c_NC_USB_HID_interface_component__Description
[USB Data Type] Input Value > 1 Bit [Common Usage] Axis, Selector switch, jog Wheel, volume control [Description] 
An input value which has a data length greater than 1 bit, has its value exposed as an integer value. This may be an analogue joystick, or a selector switch.
hidcomp - EMC/LinuxCNC USB HID interface component
Description