step7_data_blocks.pdf

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Modul_B04
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
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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
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Automation– and Drive Technology- SCE
PAGE:
1.
Forward .................................................................................................................
4
2.
Notes for Data Blocks ..........................................................................................
6
3.
Generating Data Blocks ......................................................................................
7
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
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Automation– and Drive Technology- SCE
1.
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
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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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