Link Axes - Siemens SINUMERIK 840D sl Programming Manual

Other information
15.1 Axes
15.1.11

Link axes

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 non-local axes from the perspective of a specific NCU.
The axis container concept is used for the dynamic modification of the assignment to an NCU.
Axis exchange with GET and RELEASE from the part program is not available for link axes.
Further information
Prerequisites
• The participating NCUs, NCU1 and NCU2, must be connected by means of high-speed
communication via the link module.
References:
Configuration Manual, NCU
• The axis must be configured appropriately by machine data.
• The "Link axis" option must be installed.
Description
The position control is implemented on the NCU on which the axis is physically connected to
the drive. This NCU also contains the associated axis VDI interface. The position setpoints for
link axes are generated on another NCU and communicated via the NCU link.
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Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals