Siemens sinumerik 840D sl Function Manual page 835

Detailed description
2.4 Boundary conditions
Syntax check
All program errors that can be corrected by means of a compensation block are detected
during preprocessing. In addition, when the program includes branches and check
structures, a check is made to ensure that the branch destinations are present and that
structures are nested correctly.
Branch destinations and labels must be unique in the program.
After the errors detected during preprocessing have been corrected, preprocessing must be
started again by means of an NCK POWER ON.
2.4 Boundary conditions
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.
14
Special functions: Preprocessing (V2)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0