Siemens SINUMERIK 828D Programming Manual page 164

Geometry settings
8.1 Settable work offset (G54 to G57, G505 to G599, G53, G500, SUPA, G153)
In the next NC block with a programmed movement, all of the positional parameters and thus
the tool movements refer to the workpiece zero, which is now valid.
Note
With the four available zero offsets, it is possible (e.g. for multiple machining) to
simultaneously describe four workpiece clampings and call them in the program.
Further settable zero offsets: G505 to G599
The command numbers
a total of 100 settable zero offsets can be created in the zero point memory via machine data
including the four preset zero offsets
164
to are available for further settable zero offsets. Therefore,
G505 G599
to .
G54 G57
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
Fundamentals