S7300

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SIMATIC
S7-SCL V5.3 for S7-300/400
Getting Started Release 01/2005

First Steps
The Getting Started for This product is not a stand-alone description. It is a part of the manual and can be called via "First Steps".

Safety Guidelines
This manual contains notices intended to ensure personal safety, as well as to protect the products and connected equipment against damage. These noticesare highlighted by the symbols shown below and graded according to severity by the following texts:

! ! !

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.

Cautionindicates that minor personal injury can result if proper precautions are not taken.

Caution
indicates that 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 installand 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.

Use as intended
Note the following:

!

Warning
This device and its components may only be used for the applications described in the catalog or the technical description,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 trademarks of Siemens AG. Third parties using fortheir own purposes any other names in this document which refer to trademarks might infringe upon the rights of the trademark owners.

Copyright Siemens AG 2005 All rights reserved
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 orregistration 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 forimprovement are welcomed.

Siemens AG
Automation and Drives Postfach 4848, 90327 Nuremberg, Germany © Siemens AG 2005 Technical data subject to change.

Siemens Aktiengesellschaft

A5E00324655-01

Designing an S7-SCL Program

Welcome to "Measured Value Acquisition" - A Sample Program for First-Time Users
What You Will Learn
The sample program for first-time users shows you how to useS7-SCL effectively. At first, you will probably have lots of questions, such as: • • • How do I design a program written in S7-SCL? Which S7-SCL language functions are suitable for performing the task? What debugging functions are available?

These and other questions are answered in this section.

S7-SCL language Elements Used
The sample program introduces the following S7-SCL languagefunctions: • • • • • • Structure and use of the various S7-SCL block types Block calls with parameter passing and evaluation Various input and output formats Programming with elementary data types and arrays Initializing variables Program structures and the use of branches and loops

Required Hardware
You can run the sample program on a SIMATIC S7-300 or SIMATIC S7-400 and you will need the...