Siemens SIMATIC S7-200 Getting Started page 6

Table of contents

5

Sequencer ............................................................................................................................................ 43

5.1

Introduction............................................................................................................................... 43

5.2

Solution Starting Point .............................................................................................................. 44

5.3

Sequencer control..................................................................................................................... 45

5.4

Transition condition................................................................................................................... 46

5.5

Structure of the sequencer program ......................................................................................... 47

5.6

Control logic for the sequencer ................................................................................................. 48

5.7

Working with memory bits......................................................................................................... 49

5.8

Transition condition for the sequencer ...................................................................................... 50

5.9

Advantages of working with sequencers................................................................................... 51

5.10

Important safety considerations ................................................................................................ 52

5.11

Making safe transitions ............................................................................................................. 53

5.12

Modification .............................................................................................................................. 54

5.13

Solution description: Transitions ............................................................................................... 55

5.14

Solution description: Activating the steps.................................................................................. 56

5.15

Solution description: Activating a timer ..................................................................................... 57

5.16

Solution description: Activating the outputs .............................................................................. 58

5.17

Test .......................................................................................................................................... 59

6

Learning More ...................................................................................................................................... 61

6.1

Do you Want to Learn More?.................................................................................................... 61

A

Appendix A ........................................................................................................................................... 63

A.1

Bridge Circuit ............................................................................................................................ 63

A.2

Diode Circuit ............................................................................................................................. 64

A.3

Changeover Switch................................................................................................................... 65

6

Getting Started - Advanced

Training Documents, 09/2007, A5E01469795B