Constraints - Siemens SINUMERIK 840D sl Function Manual

V2: Preprocessing

18.4 Constraints

18.4 Constraints
Availability of the "preprocessing" function
The function is an option ("Program pre-processing"), which must be assigned to the
hardware via the license management.
Vocabulary
The full vocabulary of the NC language is available in the part program.
There are no restrictions on the calculation of measured process variables and in the reaction
to signals from the process and other channels (override, deletion of distance-to-go, motion-
synchronous actions, channel coordination, interrupt processing, etc.).
Axis identifier
Part programs are compiled independently of channels. For this reason, the geometry and
channel identifiers set in the following machine data must be identical in all channels if they
are used directly in the precompiled cycles:
MD20060 $MC_AXCONF_GEOAX_NAME_TAB (name of the geometry axis in the channel)
MD20080 $MC_AXCONF_CHANAX_NAME_TAB (name of the channel axis in the channel)
Generally speaking, axis identifiers are not used directly in machining cycles since cycles are
written as follows:
• independently of channels and
• independently of the axis identifiers defined on the machine.
The axes to be traversed are addressed indirectly via machine data or transferred as
parameters:
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Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions