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

C79000-G7076-C504-02

Table 1-1 Summary of the Documentation

Title

Subject

S7-300 Programmable

Controller

Quick Start, Primer

The primer provides you with a very simple introduction to the methods of configuring

and programming an S7-300/400. It is particularly suitable for first-time users of an S7

programmable logic controller.

S7-300/400 Program

Design

Programming Manual

The “S7-300/400 Program Design” programming manual provides you with the basic

information you require about the structure of the operating system and a user program

for an S7 CPU. First-time users of an S7-300/400 should use this manual to get a basic

overview of programming methods on which to base the design of a user program.

S7-300/400 System and

Standard Functions

Reference Manual

The S7 CPUs have system functions and organization blocks integrated in the operating

system that can be used when programming. The manual provides you with an

overview of the system functions, organization blocks and loadable standard functions

available with an S7 programmable controller and contains detailed interface

descriptions explaining how to use the functions and blocks in your user program.

STEP 7

User Manual

The “STEP 7” User Manual explains the basic use and functions of the STEP 7

automation software. Whether you are a first-time user of STEP 7 or an experienced

STEP 5 user, the manual will provide you with an overview of the procedures for

configuring, programming and getting started with an S7-300/400 programmable

controller. When working with the software, you can call up the online help which

supports you with information about specific details of the program.

Converting S5 Programs

User Manual

You require the “Converting S5 Programs” User Manual if you want to convert

existing S5 programs and to run them on S7 CPUs. The manual explains how to use the

converter. The online help system provides more detailed information about using the

specific converter functions. The online help system also includes an interface

description of the available converted S7 functions.

STL, LAD, FBD, SCL

Manuals

The manuals for the language packages STL, LAD, FBD, and SCL contain both

instructions for the user and a description of the language. To program an S7-300/400,

you only require one of the languages, but you can, if required, mix the languages

within a project. When using one of the languages for the first time, it is advisable to

familiarize yourself with the methods of creating a program as explained in the manual.

When working with the software, you can use the online help system which provides

you with detailed information about using the editors and compilers.

GRAPH

, HiGraph

CFC

Manuals

The GRAPH, HiGraph, and CFC languages provide you with optional methods for

implementing sequential control systems, status control systems, or graphical

interconnection of blocks. The manuals contain both the user instructions and the

description of the language. When using one of these languages for the first time, it is

advisable to familiarize yourself with the methods of creating a program based on the

“S7-300 and S7-400 Program Design” manual. When working with the software, you

can also use the online help system (with the exception of HiGraph) that provides you

with detailed information about using the editors and compilers.

Optional package for system software for S7-300/S7-400

Preface

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