Siemens NAN 67 Series Manual de servicio descargar pdf (Pagina 27)

3-3

Ladder Logic (LAD) for S7-300 and S7-400

C79000-G7076-C504-02

3.2 Logic Blocks in the Editor

Before you start programming in the LAD Editor, you should familiarize

yourself with the various ways in which you can customize the editor to suit

your preferences and method of working.

With the menu command Options

Customize, you can open a tabbed page

dialog box. In the “Editor” tabbed page, you can make the following basic

settings for block programming:

S Font (type style, size) used in text and tables

S The programming language of your choice (FBD, LAD, or STL). A new

block will be opened in FBD, LAD, or

STL depending on the

programming language you select. Bearing in mind certain restrictions,

you can switch to one of the other languages later on and still view the

block.

S Display of symbols and comment in the new block (on or off)

The settings for language, comment and symbols can be altered at any time

during editing by using the commands in the View

”

... menu.

In the “LAD/FBD” tabbed page, which you also display with Options

Customize, you can make the following basic settings:

S Ladder Layout: determines the display size of your networks. The

selected size decides how many LAD elements you can position next to

each other in one network. This setting also has effects when printing out

the block.

S Width of Address Field: determines the width of text fields for addresses.

If the width is exceeded, a line break is made. A large address field is

more practical for symbolic addressing, a small field is sufficient for

absolute addressing.

S Line/Color for: the selected element, contact, status fulfilled, status not

fulfilled

Overview

Settings in the

Editor

Settings for LAD

Creating Logic Blocks

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Siemens NAN 67 Series Manual de servicio Pagina 27