Refer to your machine manual.
This function must be enabled and adapted by the machine manufacturer.

This cycle enables you to machine a contour on a cylindrical surface. The contour to be machined is programmed on the unrolled surface of the cylinder. With this cycle, the control adjusts the tool in such a way that, with radius compensation active, the walls of the milled contour are always parallel to the cylinder axis.
Describe the contour in a subprogram that you program with Cycle 14 CONTOUR.
In the subprogram you always describe the contour with the coordinates X and Y, regardless of which rotary axes exist on your machine. This means that the contour description is independent of your machine configuration. The path functions L, CHF, CR, RND and CT are available.
Unlike in Cycles 28 and 29, in the contour subprogram, you define the contour actually to be machined.