Siemens Sinumerik 840D sl Programming Manual page 167

Note
It is possible to switch block-by-block in the NC program between polar and Cartesian
dimensions. It is possible to return directly to the Cartesian system by using Cartesian
coordinate identifiers (X..., Y..., Z...). The defined pole is moreover retained up to program end.
Note
If no pole has been specified, the zero point of the current workpiece coordinate system applies.
Example
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
10.3 Travel commands with polar coordinates
Poles 1 to 3 are defined as follows:
● Pole 1 with G111 X... Y...
● Pole 2 with G110 X... Y...
● Pole 3 with G112 X... Y...
Motion commands
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