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LOGIX 5000
Allen-Bradley LOGIX 5000 Programming Manual
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Programming Manual
Logix 5000 Controllers
S
equenti
al F
unc
tion
Char
ts
1756 ControlLogi
x, 1756
GuardLogix
, 1769 Comp
actLogix, 1769
Compact
GuardLogi
x,
1
789 SoftLogix, 5069 Co
mpactLogix, 5069 Compact GuardLogix, Studio 5000 Logix Emulate
2
Table of Contents
Default Chapter
5
Table of Contents
5
Preface
9
Studio 5000 Environment
9
Additional Resources
10
Legal Notices
10
Chapter 1
13
Design a Sequential Function Chart
13
Introduction
13
What Is a Sequential Function Chart
14
Define the Tasks
18
Choose How to Execute the SFC
19
Define the Steps of the Process
19
Step Guidelines
19
SFC_STEP Structure
20
Organize the Steps
23
Sequence
25
Selection Branch
25
Simultaneous Branch
26
Wire to a Previous Step
27
Add Actions for each Step
28
How Do You Want to Use the Action
28
Use a Non-Boolean Action
28
Use a Boolean Action
29
SFC_ACTION Structure
30
Describe each Action in Pseudocode
31
Choose a Qualifier for an Action
32
Define the Transition Conditions
33
Transition Tag
34
How Do You Want to Program the Transition
34
Use a BOOL Expression
35
Call a Subroutine in a Transition
35
Transition after a Specified Time
36
Turn off a Device at the End of a Step
38
Choose a Last Scan Option
39
Use the Don't Scan Option
40
Use the Programmatic Reset Option
41
Use the Automatic Reset Option
43
Keep Something on from Step-To-Step
45
How Do You Want to Control the Device
45
Use a Simultaneous Branch
45
Store and Reset an Action
46
Use One Large Step
47
End the SFC
48
Use a Stop Element
48
Restart (Reset) the SFC
49
SFC_STOP Structure
50
Nest an SFC
50
Pass Parameters
52
Configure When to Return to the OS/JSR
52
Execution Diagrams
53
Pause or Reset an SFC
53
Program a Sequential Function Chart
59
Chapter 2 Introduction ........................................................................................................................ 59
60
Add and Automatically Connect Elements
60
Drag Elements
60
Create a Simultaneous Branch
60
Start a Simultaneous Branch
60
End a Simultaneous Branch
61
Create a Selection Branch
62
Start a Selection Branch
62
End a Selection Branch
63
Set the Priorities of a Selection Branch
63
Connect a Wire to the Step
65
Configure a Step
66
Assign the Preset Time for a Step
66
Configure Alarms for a Step
67
Use an Expression to Calculate a Time
67
Hide a Wire
66
Program a Transition
68
Enter a BOOL Expression
68
Call a Subroutine When Programming a Transition
69
Add an Action
69
Configure an Action
69
Change the Qualifier of an Action
69
Calculate a Preset Time at Runtime
70
Mark an Action as a Boolean Action
71
Program an Action
71
Enter Structured Text
71
Call a Subroutine in an Action
72
Assign the Execution Order of Actions
72
Document an SFC
73
Language Switching
73
Add Structured Text Comments
74
Add a Tag Description
75
Add a Text Box
75
Show or Hide Text Boxes or Tag Descriptions
76
Hide an Individual Tag Description
76
Configure the Execution of the SFC
77
Verify the Routine
77
Edit an SFC Online
78
Maintain Active SFC Step
78
Rockwell Automation Publication 1756-PM006I-EN-P - February
78
Chapter 3 Introduction ........................................................................................................................
79
Enable Forces
79
Force Steps
79
Precautions
79
Check Force Status
80
Force LED
81
GSV Instruction
82
Disable or Remove a Force
80
Step through a Transition or a Force of a Path
82
When to Use an SFC Force
83
Force a Transition
83
Force a Simultaneous Path
85
Add an SFC Force
86
Remove or Disable Forces
87
Disable All SFC Forces
87
Remove All SFC Forces
87
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Allen-Bradley LOGIX 5000 Specifications
General
Brand
Allen-Bradley
Model
LOGIX 5000
Category
Controller
Language
English
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