step7_data_blocks.pdf

Automation– and Drive Technology- SCE

Training document for the company-wide

automation solution

Totally Integrated Automation (T I A)

MODULE B4

Data blocks

T I A Training document Page 1 of 18 Module B4

Last revision: 02/2002 Data Blocks

Automation– and Drive Technology- SCE

This document was provided by Siemens A&D SCE (automation and drive technology, Siemens A&D

Cooperates with Education) for training purposes. Siemens does not make any type of guarantee regarding its

contents.

The passing on or duplication of this document, including the use and report of its contents, is only permitted

within public and training facilities.

Exceptions require written permission by Siemens A&D SCE (Mr. Knust: E-Mail:

michael.knust@hvr.siemens.de). Offences are subject to possible payment for damages caused. All rights are

reserved for translation and any case of patenting or GM entry.

We thank the company Michael Dziallas Engineering and the instructors of vocational schools as well as further

persons for the support with the production of the document.

T I A Training document Page 2 of 18 Module B4

Last revision: 02/2002 Data Blocks

Automation– and Drive Technology- SCE

PAGE:

Forward .................................................................................................................

Notes for Data Blocks ..........................................................................................

Generating Data Blocks ......................................................................................

The following symbols stand for the specified modules:

Information

Programming

Example exercise

Notes

T I A Training document Page 3 of 18 Module B4

Last revision: 02/2002 Data Blocks

Automation– and Drive Technology- SCE

FORWARD

The module B4 is assigned content wise to Additional functions of STEP 7- Programming .

Basics of

STEP 7- Programming

2 - 3 days A modules

Additional functions of

STEP 7- Programming

2- 3 days B Modules

Industrial field bus

systems

2- 3 days D modules

Sequencer

programming

2- 3 days C modules

Process

visualization

2- 3 days F modules

IT- Communication

with SIMATIC S7

1- 2 days E modules

Learning goal:

In this module, the reader should learn how a data block can be used to save data.

Specifying a structure of a data block

Access to a data element in a STEP 7- Program

Requirements:

For the successful use of this module, the following knowledge is assumed:

Basics of PLC- Programming with STEP 7 (e.g. Module A3 - ‘Startup’

PLC programming with STEP 7)

Basics to structured programming (e.g. Appendix I - Basics to PLC –Programming with

SIMATIC S7-300)

Forward Notes Generating data blocks

T I A Training document Page 4 of 18 Module B4

Last revision: 02/2002 Data blocks

Generating data blocks

Knowledge in the use of Windows 95/98/2000/ME/NT4.0

Automation– and Drive Technology- SCE

Required hardware and software

1 PC, Operating system Windows 95/98/2000/ME/NT4.0 with

- Minimal: 133MHz and 64MB RAM, approx. 65 MB free hard disk space

- Optimal: 500MHz and 128MB RAM, approx. 65 MB free hard disk space

2 Software STEP 7 V 5.x

3 MPI- Interface for the PC (e.g. PC- Adapter)

4 PLC SIMATIC S7-300 with at least one digital in- and output module. The inputs must be lead

through a functional unit.

Example configuration:

- Power supply: PS 307 2A

- CPU: CPU 314

- Digital input: DI 16x DC24V

- Digital output: DO 16x DC24V / 0.5 A

1 PC

2 STEP 7

3 PC Adapter

4 SIMATIC S7-300

Forward Notes Generating data blocks

T I A Training document Page 5 of 18 Module B4

Last revision: 02/2002 Data blocks

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