FUP_e.pdf

Important Notes, Contents

Bit Logic Instructions

SIMATIC

Comparison Instructions

Conversion Instructions

Function Block Diagram (FBD)

for S7-300/400

Programming

Counter Instructions

Data Block Instructions

Jump Instructions

Reference Manual

Integer Math Instructions

This manual is part of the documentation package

with the order number:

Floating-Point Math Instructions

6ES7810-4CA05-8BR0

Move Instructions

Program Control Instructions

Shift and Rotate Instructions

Status Bit Instructions

Timer Instructions

Word Logic Instructions

Appendices

Overview of All FBD

Instructions

Programming Examples

Edition 08/2000

A5E00068870-02

Index

Safety Guidelines

This manual contains notices which you should observe to ensure your own personal safety, as well as to

protect the product and connected equipment. These notices are highlighted in the manual by a warning

triangle and are marked as follows according to the level of danger:

Danger

indicates that death, severe personal injury or substantial property damage will result if proper

precautions are not taken.

Warning

indicates that death, severe personal injury or substantial property damage can result if proper

precautions are not taken.

Caution

indicates that minor personal injury or property damage can result if proper precautions are not taken.

Note

draws your attention to particularly important information on the product, handling the product, or to a

particular part of the documentation.

Qualified Personnel

Only qualified personnel should be allowed to install and work on this equipment. Qualified persons are

defined as persons who are authorized to commission, to ground, and to tag circuits, equipment, and

systems in accordance with established safety practices and standards.

Correct Usage

Note the following:

Warning

This device and its components may only be used for the applications described in the catalog or the

technical descriptions, and only in connection with devices or components from other manufacturers

which have been approved or recommended by Siemens.

This product can only function correctly and safely if it is transported, stored, set up, and installed

correctly, and operated and maintained as recommended.

Trademarks

SIMATIC®, SIMATIC HMI® and SIMATIC NET® are registered trademarks of SIEMENS AG.

Some of other designations used in these documents are also registered trademarks; the owner’s rights may

be violated if they are used by third parties for their own purposes.

The reproduction, transmission or use of this document or its

contents is not permitted without express written authority.

Offenders will be liable for damages. All rights, including rights

created by patent grant or registration of a utility model or design,

are reserved.

Disclaimer of Liability

We have checked the contents of this manual for agreement with

the hardware and software described. Since deviations cannot be

precluded entirely, we cannot guarantee full agreement. However,

the data in this manual are reviewed regularly and any necessary

corrections included in subsequent editions. Suggestions for

improvement are welcomed.

Siemens AG

Bereich Automatisierungs- und Antriebstechnik

Geschaeftsgebiet Industrie-Automatisierungssysteme

Postfach 4848, D- 90327 Nuernberg

Technical data subject to change.

Siemens Aktiengesellschaft

A5E00068870

Important Notes

Purpose

This manual is your guide to creating user programs in the Function Block Diagram

(FBD) programming language.

The manual also includes a reference section that describes the syntax and

functions of the language elements of Function Block Diagram.

Basic Knowledge Required

The manual is intended for S7 programmers, operators, and maintenance/service

personnel.

In order to understand this manual, general knowledge of automation technology is

required.

In addition, you must be familiar with using computers or PC-similar tools (for

example, programming devices) with the Windows 95 / 98 / NT or Windows 2000

operating system.

Scope of the Manual

This manual is valid for release 5.1 of the STEP 7 programming software package.

Compliance with Standards

FBD corresponds to the "Function Block Diagram" language defined in the

International Electrotechnical Commission’s standard IEC 1131-3. For further

details, refer to the table of standards in the STEP 7 file NORM_TBL.WRI.

Function Block Diagram (FBD) for S7-300/400 Programming

A5E00068870-02

iii

Important Notes

Requirements

To use the Function Block Diagram manual effectively, you should already be

familiar with the theory behind S7 programs which is documented in the online help

for STEP 7. The language packages also use the STEP 7 standard software, so

you should be familiar with handling this software and have read the accompanying

documentation.

This manual is part of the documentation package "STEP 7 Reference".

The following table displays an overview of the STEP 7 documentation:

Documentation

Purpose

Order Number

STEP 7 Basic Information with

Basic information for technical

personnel describing the methods

of implementing control tasks with

STEP 7 and the S7-300/400

programmable controllers.

6ES7810-4CA05-8BA0

Working with STEP 7 V5.1,

Getting Started Manual

Programming with STEP 7 V5.1

Configuring Hardware and

Communication Connections,

STEP 7 V5.1

From S5 to S7, Converter Manual

STEP 7 Reference with

Provides reference information

and describes the programming

languages LAD, FBD, and STL,

and standard and system

functions extending the scope of

the STEP 7 basic information.

6ES7810-4CA05-8BR0

Ladder Logic (LAD)/Function Block

Diagram (FBD)/Statement List (STL)

for S7-300/400 manuals

Standard and System Functions for S7-

300/400

Online Helps

Purpose

Order Number

Help on STEP 7

Basic information on

programming and configuring

hardware with STEP 7 in the form

of an online help.

Part of the STEP 7

Standard software.

Reference helps on STL/LAD/FBD

Reference help on SFBs/SFCs

Reference help on Organization Blocks

Context-sensitive reference

information.

Part of the STEP 7

Standard software.

Function Block Diagram (FBD) for S7-300/400 Programming

A5E00068870-02

Important Notes

Online Help

The manual is complemented by an online help which is integrated in the software.

This online help is intended to provide you with detailed support when using the

software.

The help system is integrated in the software via a number of interfaces:

The context-sensitive help offers information on the current context, for

example, an open dialog box or an active window. You can open the context-

sensitive help via the menu command Help > Context-Sensitive Help , by

pressing F1 or by using the question mark symbol in the toolbar.

You can call the general Help on STEP 7 using the menu command Help >

Contents or the "Help on STEP 7" button in the context-sensitive help window.

· You can call the glossary for all STEP 7 applications via the "Glossary" button.

This manual is an extract from the "Help on Function Block Diagram". As the

manual and the online help share an identical structure, it is easy to switch

between the manual and the online help.

Feedback on Documentation

To help us to provide the best possible documentation for you and future STEP 7

users, we need your support. If you have any comments or suggestions relating to

this manual or the online help, please complete the questionnaire at the end of the

manual and send it to the address shown. Please include your own personal rating

of the documentation.

SIMATIC Training Centers

Siemens offers a number of training courses to introduce you to the SIMATIC S7

automation system. Please contact your regional training center or the central

training center in D-90327 Nuremberg, Germany for details:

Telephone: +49 (911) 895-3200.

Function Block Diagram (FBD) for S7-300/400 Programming

A5E00068870-02

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