Brief Description - Siemens sinumerik 840D sl Function Manual

Brief description

Preprocessing
The programs stored in the directories for standard and user cycles can be preprocessed to
reduce runtimes.
Preprocessing is activated via machine data.
Standard and user cycles are preprocessed when the power is switched on, i.e. as an
internal control function, the part program is translated (compiled) into a binary intermediate
code optimized for processing purposes.
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.
The full scope of control functionality is available:
• Override influence
• Reactions to data and signals that are input by the PLC or the operator
• Current block display
• The programs can be processed in single block mode (SBL1 and SBL2). Block searches
Preprocessing can be used:
• To optimize the runtimes of part programs with high-level language components
• CPU time intensive part programs (e.g. stock removal cycles)
• Faster processing of time-critical sections (e.g. program continuation after preprocessing
Special functions: Preprocessing (V2)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
can be executed. The compilation cannot be stored; it is concealed from the user and
regenerated every time the power is switched on.
(branches, check structures, motion-synchronous actions)
stop during rapid deletion of distance-to-go, or return stroke, or in the tool change cycle).
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