1756-PM003H-EN-E, SFC and ST Programming Languages ...

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$Course Material\Efficiently Coding Communication Protocols in C++ ...$

4-14 Design a Sequential Function Chart Simultaneous Branch A simultaneous branch represents paths (steps or group of steps) that occur at the same time (i.e., an AND structure). • All paths execute. • All paths must finish before continuing with the SFC. • The SFC checks the transition after the last step of each path has executed at least once. one transition for all paths do this… AND this… AND this… double horizontal line double horizontal line Wire to a Previous Step In addition to connecting steps in sequences, simultaneous branches, and selection branches, you can connect a step to a previous point in your SFC. This lets you: • loop back and repeat steps • return to the beginning of the SFC and start over Publication 1756-PM003H-EN-E (excerpt from 1756-PM001H-EN-P) - August 2005
Design a Sequential Function Chart 4-15 For example: …go to this step If this condition is true… simple loop that repeats the entire SFC path of a selection branch that returns to a previous step Add Actions for Each Step Use actions to divide a step into the different functions that the step performs, such as commanding a motor, setting the state of a valve, or placing a group of devices in a specific mode. Step Actions MIX Do this… …and do this How Do You Want to Use the Action? There are two types of actions: If you want to: execute structured text directly in the SFC call a subroutine use the automatic reset option to reset data upon leaving a step only set a bit and program other logic to monitor the bit to determine when to execute. Then: Use a Non-Boolean Action Use a Boolean Action Publication 1756-PM003H-EN-E (excerpt from 1756-PM001H-EN-P) - August 2005
Page 1 and 2: SFC and ST Programming Languages Ex
Page 3 and 4: Preface Purpose of this Manual This
Page 5 and 6: Table of Contents Design a Sequenti
Page 7 and 8: Chapter 4 Design a Sequential Funct
Page 9 and 10: Design a Sequential Function Chart
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Page 57 and 58: Chapter 5 Program a Sequential Func
Page 59 and 60: Program a Sequential Function Chart
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Program a Sequential Function Chart
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Chapter 6 Program Structured Text W
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Program Structured Text 6-3 The exp
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Program Structured Text 6-5 In stru
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Program Structured Text 6-7 For exa
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Program Structured Text 6-9 Use log
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Program Structured Text 6-11 Instru
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Program Structured Text 6-13 IF...T
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Program Structured Text 6-15 Exampl
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Program Structured Text 6-17 The sy
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Program Structured Text 6-19 FOR…
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Program Structured Text 6-23 These
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Program Structured Text 6-25 REPEAT
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Chapter 13 Force Logic Elements Whe
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Force Logic Elements 13-3 Disable o
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Force Logic Elements 13-5 FORCE LED
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Force Logic Elements 13-7 - Removin
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Force Logic Elements 13-9 When to U
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Force Logic Elements 13-11 • To l
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Force Logic Elements 13-13 Disable
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Chapter 10 Program Control Instruct
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Program Control Instructions (JSR,
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