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P3: Basic PLC Program for SINUMERIK 840D sl

13.12 Basic conditions and NC VAR selector

Basic Functions

914 Function Manual, 09/2011, 6FC5397-0BP40-2BA0

• Reference manual STEP 7; Default and system functions

• Manual STEP 7; Conversion of STEP 5 programs

• STEP 7 overall index

• Manual CPU 317-2DP

13.12.1.3 Relevant SINUMERIK documents

Reference:

• Start-up manual SINUMERIK 840D sl

• Device manual Operator Components SINUMERIK 840Dsl / 840Disl

• Function Manual Basic Functions

• Function Manual, Extended Functions:

• Function manual, Special functions

• Lists sl (Book1)

• Lists sl (Book2)

13.12.2 NC VAR selector

13.12.2.1 Overview

General

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".

For storing the files created by NC-VAR-selector a catalog is to be implemented via the Windows Explorer with

any catalog name. The selected data of the NC-VAR selector (data.VAR and data.AWL files) must be stored in

this catalog. Thereafter, the AWL file is to be transferred and compiled via the menu option "Code" → "in STEP7

Project" The "Daten.AWL" (STL data) file must then be inserted into the STEP7 machine project via "Insert",

"External Source" in the STEP7 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 AWL (STL)

files must be compiled with STEP 7.

Note

The latest NC VAR selector can be used for each NC software version (even earlier

versions). For older NC software versions the variables can also be selected from the latest

complete list. The data content in DB120 (default DB for variables) does not depend on the

software status. That is, variables selected in an older software version need not be

reselected when the software is upgraded.

Siemens SINUMERIK 828D Function Manual

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