Programming Concepts, Conventions, And Features - Siemens Simatic S7-200 System Manual

Programming Concepts, Conventions,
and Features
The S7-200 continuously executes your program to control a task or process. You use STEP 7-Micro/WIN
to create this program and download it to the S7-200. STEP 7-Micro/WIN provides a variety of tools and
features for designing, implementing, and debugging your program.
In This Chapter
Guidelines for Designing a Micro PLC System
Basic Elements of a Program
Using STEP 7-Micro/WIN to Create Your Programs
Choosing Between the SIMATIC and IEC 1131-3 Instruction Sets
Understanding the Conventions Used by the Program Editors
Using Wizards To Help You Create Your Control Program
Handling Errors in the S7-200
Assigning Addresses and Initial Values in the Data Block Editor
Using the Symbol Table for Symbolic Addressing of Variables
Using Local Variables
Using the Status Chart to Monitor Your Program
Creating an Instruction Library
Features for Debugging Your Program
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