Allen-Bradley 1738-ADNX Manuel d'utilisateur Page 83
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Publication 1768-UM001C-EN-P - November 2007
Develop Applications 83
If you increase the time slice to 50%, the system overhead interrupts the
continuous task every millisecond.
If the controller only contains periodic tasks, the system overhead time slice
value has no effect. System overhead runs whenever a periodic task is not
running.
Additional Resources
These documents contain additional information pertinent to the
development of applications.
1 ms
System Overhead
1 ms
Continuous Task
5 10152025
Elapsed Time (ms)
Periodic Task
System Overhead
5 10152025
Continuous Task
Elapsed Time (ms)
Resource Description
Logix5000 Controllers Common Procedures
Programming Manual, publication
1756-PM001
Provides guidance on the development of
controller projects.
Logix5000 Controllers Design
Considerations Reference Manual,
publication 1756-RM094
Provides information pertinent to the design
of Logix5000 systems.
Logix5000 Controllers Execution Time and
Memory Use Reference Manual, publication
1756-RM087
Details how to estimate the execution time
and memory use of the controller’s logic.
Logix5000 Controllers General Instructions
Reference Manual, publication
1756-RM003
Details how to program the controller for
sequential applications.
- 1768 CompactLogix 1
- Controllers 1
- Important User Information 2
- Summary of Changes 3
- Updated Information 3
- Summary of Changes 4 4
- Table of Contents 5
- 6 Table of Contents 6
- Table of Contents 7 7
- 8 Table of Contents 8
- Purpose of This Manual 9
- Who Should Use This 9
- Publication 9
- Preface 10 10
- 1768 CompactLogix Overview 11
- Communication 12
- Complex CompactLogix System 12
- IMPORTANT 12
- Designing a System 13
- Connect a Controller Via 16
- Configure the Serial Driver 17
- Yes Click OK 18
- Select the Controller Path 19
- Set the IP Address via a 20
- Serial Port 20
- Communicate over Networks 21
- EtherNet/IP Network 22
- 1768-EWEB Web Server Module 26
- ControlNet Network 27
- DeviceNet Network 30
- POWER SUPP 33
- Serial Network 34
- Communicate with DF1 Devices 35
- DH-485 Network 40
- Connection Overview 45
- Producing and Consuming 46
- (interlock) Data 46
- Sending and Receiving 47
- Messages 47
- Calculating Connection Use 48
- Connections Example 49
- Place 1768 and 1769 Modules 51
- 1768 Power Supply 52
- 1769 Module Placement 53
- Configure and Monitor I/O 55
- Configuring I/O 56
- I/O Connections 58
- Configure Distributed I/O 59
- Configuring Distributed I/O 60
- Address I/O Data 61
- Determine When Data 62
- Monitor I/O Modules 63
- Reconfigure an I/O Module 65
- If the module Then 67
- Develop Applications 69
- Developing Programs 70
- Defining Tasks 71
- Defining Programs 72
- Defining Routines 72
- Sample Controller Projects 73
- Organizing Tags 74
- Selecting a Programming 75
- Language 75
- Monitoring Controller 77
- Monitoring Connections 77
- I/O Module 79
- Select a System 80
- Overhead Percentage 80
- Develop Motion Applications 85
- Make the Controller the 86
- Master Clock 86
- Add the Motion Modules 87
- Add SERCOS Interface 88
- Set Up Each SERCOS 90
- Interface Module 90
- Add the Motion Group 91
- 8. Click Finish 93
- Add Your Axes 94
- Set Up Each Axis 95
- Check the Wiring of Each 98
- Tune Each Axis 100
- Obtain Axis Information 101
- Programming Motion 102
- Additional Resources 104
- Configure PhaseManager 105
- PSC POVR PCLF PRNP PATT 106
- PCMD PFL PXRQ PPD PDET 106
- PhaseManager Overview 106
- State Model Overview 107
- How Equipment Changes States 108
- Comparing PhaseManager 109
- Minimum System 110
- Requirements 110
- Equipment Phase 110
- Instructions 110
- Maintain Nonvolatile Memory 111
- Preventing a Major Fault 112
- During a Load 112
- Using a CompactFlash 112
- Appendix 113
- Introduction 113
- Status Indicators 117
- 118 Status Indicators 118
- Status Indicators 119 119
- 120 Status Indicators 120
- Status Indicators 121 121
- RS-232 Serial Port Status 122
- Indicators 122
- Faceplate Pushbutton 122
- Numerics 123
- 124 Index 124
- Index 125 125
- 126 Index 126
- Index 127 127
- 128 Index 128
- How Are We Doing? 129
- BUSINESS REPLY MAIL 130
- Rockwell Automation 132
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