Constraints - Siemens SINUMERIK 840D sl Function Manual

V2: Preprocessing

22.4 Constraints

After the errors detected during preprocessing have been corrected, preprocessing must be
started again by means of an NCK POWER ON.
22.4 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.
Language scope
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 name
Part programs are compiled independently of channels. For this reason, the geometry and
channel names 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 names are not used directly in machining cycles since cycles are
written as follows:
● independently of channels and
● independently of the axis names defined on the machine.
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Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions