Siemens SINUMERIK 840D sl Function Manual page 1903

PAROT
If the coordinate system needs to be fixed relative to the workpiece, i.e., not only offset
relative to the original position but also rotated according to the rotation of the table, then
PAROT can be used to activate such a rotation in a similar manner to the situation with a
rotary tool.
With PAROT, the translations, scalings and mirrorings in the active frame are retained, but
the rotation component is rotated by the rotation component of a toolholder with orientation
capability corresponding to the table.
PAROT and TOROT take into account the overall change in orientation in cases where the
table or the tool are oriented with two rotary axes. With mixed kinematics only the
corresponding component caused by a rotary axis is considered. It is thus possible, for
example, when using TOROT, to rotate a workpiece such that an oblique plane lies parallel to
the XY plane fixed in space, whereby rotation of the tool must be taken into account in
machining where any holes to be drilled, for example, are not perpendicular to this plane.
Language command PAROT is not rejected if no toolholder with orientation capability is
active. This causes no changes in the programmed frame.
Note
For more information about the TCARR and TOROT functions, as well as PAROT in relation to
channel-specific system frames, please refer to:
References:
/FB1/ Function Manual, Basic Functions; Axes, Coordinate systems, Frames (K2).
Basic logic functions: Tool Offset (W1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Detailed Description
2.5 Toolholder with orientation capability
115