Siemens SINUMERIK 840D sl Function Manual page 1362

Detailed description
2.11 General conditions and NC-VAR_Selector
2.11.2.2 Description of functions
Overview
The figure below illustrates how the NC VAR selector is used within the STEP 7
environment.
Figure 2-19
The NC VAR selector is used to generate a list of selected variables from a list of variables
and then to generate an .awl file that can be compiled by the STEP 7 compiler.
• A *.awl file contains the names and alias names of the NC variables, as well as
• The generated data blocks must always be stored in the machinespecific file storage
• To ensure that the parameterization of the GET/PUT (FB 2/3) blocks with respect to NC
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Application of NC VAR selector in the STEP 7 environment
information about their address parameters. Any data block generated from this file will
only contain the address parameters (10 bytes per parameter).
according to STEP 7 specifications.
addresses can be implemented with symbols, the freely assignable, symbolic name of the
generated data block must be included in the STEP 7 symbol table.
Basic logic functions: PLC basic program solution line (P3 sl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0