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LNS Programmer's Guide
ii
Purpose
This guide describes how to use the LNS Object Server ActiveX Control to develop an
LNS application on a Microsoft Windows Server 2003, Windows XP, or Windows 2000
host PC.
Audience
This guide is intended for software developers creating LNS applications. LNS
applications may be written in any language that supports COM Components or ActiveX
controls, including Microsoft
®
Visual C++ (versions 6.0-7.1) and Microsoft Visual Basic
6.0. Readers of this guide should have programming experience in such a language, and
familiarity with L
ONWORKS
®
technology and COM/ActiveX control concepts. An
introduction to L
ONWORKS technology can be found in the Introduction to the LONWORKS
System document available at www.echelon.com
.
Examples
Throughout this guide, Visual Basic code examples are used to illustrate concepts. To
make the examples more easily understood, they have been simplified. Error checking
has been removed, and in some cases, the examples are only fragments that will not
compile.
For complete examples, see the example applications provided with the LNS Application
Developer’s Kit. This includes example network management, monitor and control, plug-
in and director, and xDriver applications. Appendix C of this document describes the
example applications in more detail.
Technical Support
If you have technical questions that are not answered within this document or the online
help files provided with the LNS Application Developer’s Kit, you can contact Echelon for
technical support. Your LNS Application Developer’s Kit distributor may also provide
technical support. In addition, you can enroll in training classes at Echelon to learn more
about LNS.
You can find out more about Echelon’s technical support and training services on the
Echelon Support home page at http://www.echelon.com/support
.
System Requirements
System requirements and recommendations for the PC on which the LNS Application
Developer’s Kit and LNS Redistribution Kit, as well as the LNS Server or LNS Remote
Client redistributions, will run are listed below.
- LNS Programmer's Guide 1
- Preface 3
- Purpose 4
- Audience 4
- Examples 4
- Technical Support 4
- Development System 5
- LNS Remote Client PC 6
- Table of Contents 7
- Software 15
- System Requirements 16
- Party Software 16
- Chapter 2 - What’s New in 19
- Turbo Edition 19
- Performance Enhancements 20
- New Features 20
- Enhanced Data Formatting 21
- GetDataPoint Method 21
- FormatLocales Collection 21
- Using Permanent Monitor Sets 25
- Using Temporary Monitor Sets 26
- Miscellaneous 31
- Compatibility 32
- Interface Compatibility 33
- Database 33
- Runtime Component Updates 33
- Exception Codes 34
- Dynamic Functional Blocks 35
- Formatting Enhancements 36
- Flexible Program ID 37
- NV Type Management 39
- Security 40
- Chapter 3 - LNS Overview 41
- Introduction to LNS 42
- The LNS Programming Model 43
- LNS Components 44
- LNS Object Server 45
- LNS Object Server Hierarchy 46
- ConnectDescTemplate 48
- NetworkVariable 48
- Network Service Devices 49
- Network Interfaces 49
- LNS Network Services 50
- LNS Clients 51
- Local Client Applications 52
- ONWORKS Channel 53
- Full Client Applications 54
- Getting Started 55
- ONWORKS network 57
- Chapter 4 - Programming an 59
- LNS Application 59
- Selecting the Access Mode 63
- Opening the Object Server 64
- Opening a Network 65
- Specifying the License Mode 67
- Dim MyNetwork as LcaNetwork 74
- Opening a System 75
- ONWORKS/IP channels 76
- Setting System Parameters 77
- Managing Transactions 79
- Monitoring and Transactions 80
- Event Handling 81
- Exception Handling 84
- Chapter 5 - Network 87
- Management : Installing a 87
- Network 87
- Installation Scenarios 89
- Engineered Mode Installation 90
- Ad Hoc Installation 90
- Engineered Mode 91
- Commissioning Phase 95
- Automatic Installation 103
- Installing Devices 107
- Tracking Device Updates 113
- Chapter 6 - Network 117
- Management: Defining 117
- Commissioning and 117
- Connecting Devices 117
- Device Interfaces 118
- ONWORKS application 120
- Device Resource Files 121
- Scope Selectors 122
- ONMARK Interoperability 123
- The Bigger Picture 124
- SFPTnodeObject 125
- UFPTcooker 125
- Creating AppDevice Objects 127
- Neuron ID Assignment 129
- Service Pin 129
- Find and Wink 131
- Manual Entry 133
- Post-Load State 134
- Commissioning Devices 135
- Device Validation Options 137
- LNS Licensing Considerations 138
- Configuring Devices 139
- Generic Configuration Data 139
- Setting Devices Online 142
- Using the OnAttachment Event 144
- Replacing Devices 146
- Upgrading Devices 148
- Decommissioning Devices 150
- Channels 151
- Removing Devices 151
- Connection Rules 154
- Device One 155
- Device Two 155
- Adding Connections 156
- Modifying Connections 157
- Mirrored Connections 158
- Connection Descriptions 159
- Chapter 7 - Network 161
- Management: Optimizing 161
- Connection Resources 161
- Network Design Time 166
- Alias Options 166
- Broadcast Options 167
- Shortage of Groups 171
- Shortage of Aliases 172
- Predictive Strategies 173
- Conclusion 175
- Chapter 8 - Network 177
- Management: Advanced 177
- Remote Full Clients 179
- Using the PreReplace Method 180
- Using Shared Media 181
- ONWORKS router 186
- Installation Order 189
- Channel Isolation Process 190
- Removing Routers 192
- Accessing a Device Interface 193
- ConfigProperties 194
- ConfigPropertiesAvailable 194
- DynamicLonMarkObjectCapacity 194
- DynamicMessageTags 194
- LonMarkObjects 194
- MaxNVSupported 195
- MessageTags 195
- NetworkVariables 195
- StaticNVCount 195
- Chapter 9 - Monitor and 203
- Control 203
- ONWORKS network, data can 204
- Permanent Monitor Sets 206
- Temporary Monitor Sets 207
- Creating Monitor Sets 208
- Managing Monitor Sets 209
- Setting Monitoring Options 214
- NvMonitorOptions Object 216
- Authentication 217
- GenerateInitialFetch 217
- PollInterval 217
- Priority 218
- ReportByException 218
- ResetPollingIfUpdated 219
- Retries 219
- ServiceType 220
- UseAsyncSend 221
- SuppressPollingIfBound 221
- ThrottleInterval 221
- UseBoundUpdates 222
- MsgMonitorOptions Object 223
- FilterByCode 224
- FilterBySource 224
- FilterCode 224
- Using the Enable Method 227
- Setting the Poll Interval 232
- Scenario 235
- Fan-in Connections 235
- Using Message Monitor Points 238
- Controlling Message Points 241
- Application 247
- Data Source Options 250
- MyDataPoint.Write() 253
- Performance Considerations 254
- Data Formatting 255
- CurrentFormatLocale 258
- (1) value, which causes 261
- Chapter 10 - LNS Database 263
- Management 263
- Overview of LNS Databases 264
- Automatic Database Upgrade 264
- Backing Up Network Databases 265
- Validating Network Databases 266
- Validate Method 267
- Special Considerations 268
- Removing Network Databases 269
- Moving Network Databases 270
- Network Recovery 271
- 5. Open the system 274
- Application-Level Recovery 276
- Chapter 11 - LNS Network 279
- Interfaces 279
- Network Interfaces Overview 280
- ONWORKS Plug 'n 281
- Addressing 283
- LonTalk Transactions 283
- Number of Groups 284
- Neuron Ids 284
- Using xDriver Interfaces 285
- Using LONWORKS/IP Interfaces 286
- ONWORKS/IP interface 289
- Chapter 12 - Director 291
- Applications and Plug-Ins 291
- ONWORKS network, or 292
- LNS Plug-In API 293
- Registering Plug-Ins 293
- Accessing Extension Data 294
- Detecting Existing Plug-Ins 296
- Implementing an LNS Plug-In 302
- Chapter 13 - LNS Licensing 303
- Demonstration Mode 305
- Standard Mode 305
- Entering the Standard Mode 306
- Protecting Your Keys 306
- Viewing License Status 306
- Tracking License Events 307
- License Event Types 307
- ONWORKS 308
- Testing Devices 309
- Applications 315
- Using setup.exe 321
- Using _SetupLNS.dll 324
- Chapter 15 - Advanced Topics 327
- File Transfer 328
- Developing Remote Tools 330
- Developing Mobile Tools 331
- Debugging LNS Applications 334
- Dim MyBuzzer As LcaAppDevice 335
- Appendix A - Deprecated 337
- Methods and Obsolete Files 337
- Deprecated Objects 338
- Deprecated Methods 338
- Deprecated Properties 339
- Obsolete Files 340
- Appendix B – LNS, MFC and 343
- LNS, MFC and ATL 344
- Example Application Suite 351
- Network Management Example 352
- Initializing a Network 353
- ONWORKS network interfaces 354
- ONWORKS/IP Server 356
- Source Code Mappings 358
- Monitor and Control Example 360
- Example Director Application 365
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