TAILIEUCHUNG - SIEMENS - simatic ladder logic (LAD) for S7-300 and S7-400 programming

This manual is your guide to creating user programs in the Ladder Logic (LAD) programming language. This manual also includes a reference section that describes the syntax and functions of the language elements of Ladder Logic. The manual is intended for S7 programmers, operators, and maintenance/service personnel. In order to understand this manual, general knowledge of automation technology is required. In addition to, computer literacy and the knowledge of other working equipment similar to the PC (. programming devices) under the operating systems MS Windows 2000 Professional or MS Windows XP Professional are required | SIEMENS Preface Contents Bit Logic Instructions SIMATIC Comparison Instructions Conversion Instructions Ladder Logic LAD for S7-300 ------------------------------------------- and S7-400 Programming Counter Instructions Data Block Instructions Reference Manual -------------------------- Logic Control Instructions Integer Math Instructions Floating Point Math Instructions Move Instructions Program Control Instructions Shift and Rotate Instructions Status Bit Instructions Timer Instructions Word Logic Instructions This manual is part of the documentation ------------------------- package with the order number 6es7810-4CA07-8BW1 Appendix Edition 01 2004 A5E00261407-01 Overview of All LAD Instructions Programming Examples Working with Ladder Logic Index 1 2 3 4 5 6 7 8 9 10 11 12 13 14 A B C Safety Guidelines This manual contains notices intended to ensure personal safety as well as to protect the products and connected equipment against damage. These notices are 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. Caution indicates 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. Notice 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 install and 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. Correct Usage Note the following Warning This .

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