**CSYS**, `KCN`

**Activates a previously defined coordinate system.**

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`KCN`

Specifies the active coordinate system, as follows:

**0 (default)**—

Cartesian

**1**—

Cylindrical with global Cartesian Z as the axis of rotation

**2**—

Spherical

**4 or WP**—

Working Plane

**5**—

Cylindrical with global Cartesian Y as the axis of rotation

**6**—

Cylindrical with global Cartesian X as the axis of rotation

**11 or greater**—

Any previously defined local coordinate system

The **CSYS** command activates
a previously defined coordinate system for geometry input and generation.
The **LOCAL**, **CLOCAL**, **CS**, **CSKP**, and **CSWPLA** commands also activate coordinate systems as they are defined. To
set the active element coordinate system attribute pointer, issue
the **ESYS** command.

The active coordinate system for files created via the **CDWRITE** command is Cartesian (**CSYS**,0).

This command is valid in any processor.

**CSYS**,4 (or **CSYS**,WP) activates
working plane tracking, which updates the coordinate system to follow
working plane changes. To deactivate working plane tracking, activate *any other* coordinate system (for example, **CSYS**,0 or **CSYS**,11).

**CSYS**,5 is a cylindrical coordinate system
with global Cartesian Y as the axis. The local x, y and z axes are
radial, θ, and axial (respectively). The R-Theta plane is the
global X-Z plane, as it is for an axisymmetric model. Thus, at θ
= 0.0, **CSYS**,5 has a specific orientation: the local
x is in the global +X direction, local y is in the global -Z direction,
and local z (the cylindrical axis) is in the global +Y direction.

**CSYS**,6 is a cylindrical coordinate system with
global Cartesian X as the axis. The local x, y and z axes are axial, radial, and θ
(respectively). The R-Theta plane is the global Y-Z plane, as it is for an axisymmetric model.
Thus, at θ = 0.0, **CSYS**,6 has a specific orientation: the local y is in
the global +X direction, local z is in the global -Z direction, and local x (the cylindrical
axis) is in the global +Y direction.