edf8e16c_NC_USB_HID_interface_component__Description
[USB Data Type] Input Value > 1 Bit, with wrap [Common Usage] Encoder [Description] 
When an input value has the wrap bit set in its description, the control is interpreted as an encoder. The wrap bit implies the counter wraps around to 0 when it hits its maximum value (or vice-versa).
hidcomp - EMC/LinuxCNC USB HID interface component
Description