Siemens SINUMERIK 840D sl Operating Manual page 201

The contours are saved at that position in the program where they are defined.
Note
Ensure that the contours are positioned after the program end identification!
The first step in creating a contour is to specify a starting point. Enter the contour element. The
contour processor then automatically defines the end of the contour.
If you alter the machining plane, the cycle will automatically adjust the associated starting point
axes. You can enter any additional commands (max. 40 characters) in G-code format for the
starting point.
Additional commands
You can program feedrates and M commands, for example, using additional G-code
commands. You can enter the additional commands (max. 40 characters) in the extended
parameter screens ("All parameters" softkey). However, make sure that the additional
commands do not collide with the generated G code of the contour. Therefore, do not use any
G-code commands of group 1 (G0, G1, G2, G3), no coordinates in the plane and no G-code
commands that have to be programmed in a separate block.
Procedure
Cartesian starting point
Grinding
Operating Manual, 05/2017, A5E40869190
1. The part program to be executed has been created and you are in the
editor.
2. Press the "Contour" and "New contour" softkeys.
The "New Contour" input window opens.
3. Enter a contour name.
4. Press the "Accept" softkey.
The input screen for the starting point of the contour appears. You can
enter Cartesian or Polar coordinates.
1. Select the machining plane and enter the contour starting point.
2. Enter any additional commands in G-code format, as required.
3. Press the "Accept" softkey.
4. Enter the individual contour elements.
Programming technology functions
9.1 Programming contours
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