Siemens SINUMERIK 840D sl Function Manual page 1071

2.11.2 NC VAR selector
2.11.2.1 Overview
General
A catalog with an optional catalog name must be set up via the Windows Explorer. The
selected data of the VAR selector (data.VAR and data.AWL (STL)) must be stored in this
catalog. An "Insert", "External source" into the STEP 7 machine project for the "Data.AWL"
file must then be carried out via the STEP 7 manager (V3 and higher). The source container
must be selected in the manager for this purpose. This action stores this file in the project
structure. Once the file has been transferred, these AWL (STL) files must be compiled with
STEP 7.
The PC application "NC VAR selector" fetches the addresses of required NC variables and
processes them for access in the PLC program (FB 2/FB 3). This enables the programmer to
select NC variables from the entire range of NC variables, to store this selection of variables,
to edit them by means of a code generator for the STEP 7 compiler and finally to store them
as an ASCII file (*.AWL) in the machine CPU program. This process is shown in the figure
"NC VAR selector".
Note
The latest NC VAR selector can be used for each NC software version (even earlier
versions). The variables can also be selected from the latest list for earlier NC software
versions. The data content in DB 120 (default DB for variables) does not depend on the
software version, i.e., selected variables in an older software version must not be reselected
when the software is upgraded.
Basic logic functions: PLC Basic program powerline (P3 pl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
2.11 Supplementary conditions and NC VAR selector
Detailed description
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