Rockwell-automation 1756-SYNCH ControlLogix SynchLink Module User Manu Manual de usuario Pagina 23
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Publication 1756-UM521C-EN-P - July 2004
Time Synchronization in the ControlLogix System 2-3
Multiple Rockwell Automation products can be synchronized with
SynchLink. In addition to the SynchLink module, the PowerFlex 700S
and the 1756-DMxxx series products (both used for drive control) also
use SynchLink to achieve drive to drive synchronization. While all of
these products maintain interoperability, not all SynchLink features are
incorporated into every product that uses SynchLink; the 1756-SYNCH
module, however, uses all of the SynchLink features.
SynchLink Node Clock
The SynchLink node clock is integral to the SynchLink circuit design.
Any product incorporating SynchLink incorporates the SynchLink
node clock as a base-line requirement. The SynchLink node clock has
a 1μS resolution and is synchronized from node to node when the
SynchLink system is configured.
SynchLink uses a Time Master-Slave mechanism to achieve time
synchronization. During system configuration, you configure one
SynchLink node as the Time Master and all other nodes as Time
Slaves. The SynchLink node that is configured as Time Master
becomes the system clock for the entire SynchLink system. As such,
the SynchLink Time Master broadcasts its time reference to the
SynchLink Time Slaves which adjust their node clocks to be in phase
with the master clock.
Because SynchLink is a unidirectional, broadcasting mechanism, the
master is always placed at the beginning of SynchLink systems using
the star or daisy chain configurations.
Figure 2.1
SynchLink
Time Master
SynchLink
Time Slave
SynchLink
Time Slave
SynchLink
Time Slave
SynchLink
Time Slave
Star Configuration
Daisy Chain Configuration
S.L.N.C. = SynchLink Node Clock
S.L.N.C. S.L.N.C. S.L.N.C. S.L.N.C.
S.L.N.C.
S.L.N.C. S.L.N.C. S.L.N.C.
SynchLink
Time Slave
SynchLink
Time Slave
SynchLink
Time Master
Hub
42980
42981
- ControlLogix 1
- SynchLink Module 1
- Important User Information 2
- Summary of Changes 3
- Introduction 3
- New and Revised 3
- Summary of Changes 2 4
- About This Preface 5
- Who Should Use 5
- This Manual 5
- Purpose of This Manual 5
- Using the Latest 6
- Module Firmware 6
- What This Manual Contains 8
- Related Products and 9
- Documentation 9
- Preface 6 10
- Table of Contents 11
- Table of Contents 2 12
- Table of Contents 3 13
- Table of Contents 4 14
- What is the ControlLogix 15
- SynchLink Module? 15
- Connecting a SynchLink 17
- Module to a SynchLink 17
- Using Module 19
- Identification and Status 19
- Information 19
- ATTENTION 20
- Time Synchronization in the 21
- ControlLogix System 21
- SynchLink Node Clock 23
- System Synchronization 24
- How Do the CST Clock and 25
- Work Together? 25
- Configuring Time 25
- Mastership Functionality 25
- What are the SynchLink 26
- Configurations? 26
- Daisy Chain Configuration 27
- Chapter Summary and 28
- What’s Next 28
- SynchLink Module Features 29
- Module Features That 30
- Cannot Be Configured 30
- Module Fault Reporting 31
- Full RSLogix 5000 Support 31
- Agency Certification 32
- Module Features That Can 33
- Be Configured 33
- IMPORTANT 35
- Module-Defined Data Tags 36
- Communications Formats 38
- Electronic Keying 39
- Requested Packet Interval 41
- SynchLink Transmitted Axes 43
- Transmitted Direct Words 44
- Mutiplier Overflow 45
- CST and SynchLink Mastership 46
- Noting the Power 49
- Requirements 49
- Installing the Module 50
- Connecting the Fiber 51
- Optic Cable 51
- Removing the Module 52
- RSLogix 5000 53
- Configuration Software 53
- Overview of the 54
- Configuration Process 54
- Choose a SynchLink 55
- Configuration 55
- Creating a New Module 56
- 3. Select the module type 57
- Downloading New 60
- Configuration Data 60
- Changing Configuration 61
- After Module Operation 61
- Has Begun 61
- Using the Status Indicators 63
- Using RSLogix 5000 to 65
- Troubleshoot the Module 65
- Fault message in status line 66
- Warning signal on main screen 66
- Notification in Tag Editor 66
- Determining Fault Type 67
- Using Diagnostic Counters 68
- Message Instructions 69
- Enter Message Configuration 71
- Configuration Pop-Up Screen 72
- Communication Pop-Up Screen 73
- Specifications 75
- A-2 Specifications 76
- Using Remote Axis Control 78
- 2. Name the controller 79
- Create Axis Data Tags 87
- CST Time Master 94
- Download Configuration 100
- Add a SynchLink Module 102
- Appendix 111
- Software Configuration Tags 127
- Accessing the Tags 128
- Configuration Data Tags 129
- Input Data Tags 129
- Output Data Tags 131
- Glossary 133
- Glossary 2 134
- Glossary 3 135
- Glossary 4 136
- Glossary 5 137
- Glossary 6 138
- 2 Index 140
- Index 3 141
- 4 Index 142
- How Are We Doing? 143
- BUSINESS REPLY MAIL 144
- Rockwell Automation 146
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