Command Axes; Plc Axes; Link Axes - Siemens SINUMERIK 840D sl Programming Manual

Nc programming

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Command axes

Command axes are started from synchronized actions in response to an event (command).

They can be positioned, started and stopped fully asynchronous to the part program. An axis

cannot be moved from the part program and from synchronized actions simultaneously.

Command axes are interpolated separately; in other words, each command axis has its own

axis interpolator and its own feedrate.

PLC axes are traversed by the PLC via special function blocks in the basic program; their

movements can be asynchronous to all other axes. Traversing movements take place

independently of path and synchronized movements.

Link axes are axes which are physically connected to another NCU, and whose position is

controlled from this NCU. Link axes can be assigned dynamically to channels of another NCU.

Link axes are not local axes from the perspective of a particular NCU.

The axis container concept is used for the dynamic modification of the assignment to an NCU.

Axis interchange with GET and RELEASE from the part program is not available for link axes.

NC programming

Programming Manual, 12/2019, 6FC5398-2EP40-0BA0

Fundamentals

2.15 Other information

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Sinumerik 840de sl