Specifications | Manual Programming with STEP 7 A5E02789666-01, 05/2010\r\n\r\nThis manual is part of the documentation package\r\nwith the order num\ ber:\r\n6ES7810-4CA10-8BW0 I IA AS SM ID |
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Specifications | Manual Programming with STEP 7 A5E02789666-01, 05/2010\r\n\r\nThis manual is part of the documentation package\r\nwith the order num\ ber:\r\n6ES7810-4CA10-8BW0 I IA AS SM ID |
Business section |
Specifications | Manual Programming with STEP 7 A5E02789666-01, 05/2010\r\n\r\nThis manual is part of the documentation package\r\nwith the order num\ ber:\r\n6ES7810-4CA10-8BW0 I IA AS SM ID |
Outline | Programming with STEP 7 Legal information Preface Contents 1 Introducing the Product and Installing the Software 1.1 Overview of STEP 7 1.2 The STEP 7 Standard Package 1.3 What s New in STEP 7, Version 5.5? 1.4 Extended Uses of the STEP 7 Standard Package 1.4.1 Engineering Tools 1.4.2 Run-Time Software 1.4.3 Human Machine Interface 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 2.1 Automation License Manager 2.1.1 User Rights Through The Automation License Manager 2.1.2 Installing the Automation License Manager 2.1.3 Guidelines for Handling License Keys 2 Installation 3 Working Out the Automation Concept 4 Basics of Designing a Program Structure 5 Startup and Operation 6 Setting Up and Editing the Project 7 Editing Projects with Different Versions of STEP 7 8 Defining Symbols 9 Creating Blocks and Libraries 10 Basics of Creating Logic Blocks 11 Creating Data Blocks 12 Parameter Assignment for Data Blocks 13 Creating STL Source Files 14 Displaying Reference Data 15 Checking Block Consistency and Time Stamps as a Block Property 16 Configuring Messages 17 Controlling and Monitoring Variables 18 Establishing an Online Connection and Making CPU Settings 19 Downloading and Uploading 20 Testing with the Variable Table 21 Testing Using Program Status 22 Testing using the Simulation Program (Optional Package) 23 Diagnostics 24 Printing and Archiving 25 Working with M7 Programmable Control Systems 26 Tips and Tricks 27 Appendix Index |
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Content | Defining Symbols 8.6 Entering Shared Symbols Programming with STEP 7 208 Manual, 05/2010, A5E02789666-01 8.6.4 Using Upper and Lower Case for Symbols No Distinction between Upper and Lower Case Characters Previously it was possible to define symbols in STEP 7 which differed from one another only in the case used for individual characters. This was changed in STEP 7, V4.02. It is now no longer possible to distinguish between symbols on the basis of the case used. This change was made in response to the wishes of our customers, and will greatly reduce the risk of errors occurring in a program. The restrictions which have been made to the symbol definition also support the aims of the PLCopen forum to define a standard for transferable programs. Symbol definition based solely on a distinction between upper and lower case characters is now no longer supported. Previously, for example, the following definition was possible in the symbol table: Motor1 = I 0.0 motor1 = I 1.0 The symbols were distinguished on the basis of the case used for the first letter. This type of differentiation carries with it a significant risk of confusion. The new definition eliminates this possible source of errors. Effects on Existing Programs If you have been using this criterion to distinguish between different symbols you may experience difficulties with the new definition if: • Symbols differ from one another only in their use of upper and lower case characters • Parameters differ from one another only in their use of upper and lower case characters • Symbols differ from parameters only in their use of upper and lower case characters All three of these conflicts can, however, be analyzed and resolved as described below. Symbols which Differ from One Another Only in their Use of Upper and Lower Case Characters Conflict: If the symbol table has not yet been edited with the current version of the software, the first of the non-unique symbols in the table is used when source files are compiled. If the symbol table has already been edited, such symbols are invalid; this means that the symbols are not displayed when blocks are opened and source files containing these symbols can no longer be compiled without errors. Remedy: Check your symbol table for conflicts by opening the table and saving it again. This action enables the non-unique symbols to be recognized. You can then display the non-unique symbols using the filter Non-Unique Symbols and correct them. You should also correct any source files which contain conflicts. You do not need to make any further changes to the blocks, as the current (now conflict-free) version of the symbol table is automatically used or displayed when a block is opened. |
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