Siemens SINUMERIK 840Di Function Manual page 1266

Detailed Description
2.11 General conditions and NC-VAR_Selector
2.11.2 NC VAR selector
2.11.2.1 Overview
General
A catalog with a user-defined 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. The "Daten.AWL" (STL data) file must then be inserted into the STEP7 machine
project via "Insert", "External Source" in the STEP7 Manager. 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 STL files must be compiled with STEP7.
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 STEP7 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.
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PLC Basic Program Solution Line (P3 sl)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0