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

More documents

Recommendations

Info

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

4-40 Design a Sequential Function Chart EXAMPLE Use a Stop Element When the SFC reaches last_step and process_done is true, the execution of the SFC stops. Restart (Reset) the SFC Once at the stop element, you have several options to restart the SFC: If the SFC is: nested (i.e., another SFC calls this SFC as a subroutine) NOT nested (i.e., no SFC calls this SFC as a subroutine) And the Last Scan of Active Steps option is: Automatic reset Programmatic reset Don’t scan Then: At the end of the step that calls the nested SFC, the nested SFC automatically resets: • The nested SFC resets to the initial step. • The X bit of the stop element in the nested SFC clears to zero. 1. Use an SFC Reset (SFR) instruction to restart the SFC at the required step. 2. Use logic to clear the X bit of the stop element. 1. Use an SFC Reset (SFR) instruction to restart the SFC at the required step. 2. Use logic to clear the X bit of the stop element. This example shows the use of the SFC Reset (SFR) instruction to restart the SFC and clear the X bit of the stop element. Publication 1756-PM003H-EN-E (excerpt from 1756-PM001H-EN-P) - August 2005
Design a Sequential Function Chart 4-41 EXAMPLE Restart (Reset) the SFC If SFC_a_stop.X = on (SFC_a is at the stop) and SFC_a_reset = on (time to reset the SFC) then for one scan (ons[0] = on): Reset SFC_a to SFC_a_Step_1 SFC_a_stop.X = 0 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
Page 45: Design a Sequential Function Chart
Page 57 and 58: Chapter 5 Program a Sequential Func
Page 59 and 60: Program a Sequential Function Chart
Page 79 and 80: Chapter 6 Program Structured Text W
Page 81 and 82: Program Structured Text 6-3 The exp
Page 83 and 84: Program Structured Text 6-5 In stru
Page 85 and 86: Program Structured Text 6-7 For exa
Page 87 and 88: Program Structured Text 6-9 Use log
Page 89 and 90: Program Structured Text 6-11 Instru
Page 91 and 92: Program Structured Text 6-13 IF...T
Page 93 and 94: Program Structured Text 6-15 Exampl
Page 95 and 96: Program Structured Text 6-17 The sy
Page 97 and 98:
Program Structured Text 6-19 FOR…
Page 99 and 100:
Program Structured Text 6-21 Exampl
Page 101 and 102:
Program Structured Text 6-23 These
Page 103 and 104:
Program Structured Text 6-25 REPEAT
Page 105 and 106:
Program Structured Text 6-27 Exampl
Page 107 and 108:
Chapter 13 Force Logic Elements Whe
Page 109 and 110:
Force Logic Elements 13-3 Disable o
Page 111 and 112:
Force Logic Elements 13-5 FORCE LED
Page 113 and 114:
Force Logic Elements 13-7 - Removin
Page 115 and 116:
Force Logic Elements 13-9 When to U
Page 117 and 118:
Force Logic Elements 13-11 • To l
Page 119 and 120:
Force Logic Elements 13-13 Disable
Page 121 and 122:
Chapter 10 Program Control Instruct
Page 123 and 124:
Program Control Instructions (JSR,
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
vr Pub. Title/Type SFC and ST Progr
Page 135 and 136:
ASCII Character Codes Character Dec
Page 137:
SFC and ST Programming Languages Pr
show all

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

Create successful ePaper yourself

Delete template?

Save as template?