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Publication ENET-UM527E-EN-P - October 2006
130 Socket Interface
Typical Sequence of Transactions For UDP Without
OpenConnection
The following diagram shows a typical sequence of socket interface
transactions for UDP communications without using the
OpenConnection service to specify the destination address. In this
case, the Logix controller specifies the destination for each datagram
and receives the sender’s address along with each datagram it
receives. Each transaction between the Logix controller and the web
server is a MSG instruction.
The example below shows the Logix controller sending data to a
device and then the device sending a response. This is a typical
sequence of transactions. Depending on the application protocol, the
device could instead initiate sending data to the Logix controller.
Additionally, each Write does not require an application response or
acknowledgement. The application protocol determines the exact
sequence of application transactions.
Logix
controller
Web Server Module
10.10.10.10
Device
10.10.10.11
CreateSocket
Port=49100
CreateSocket
Response Instance =
102
Write
10.10.10.11?Port=49200
Data = abc
Write Response
Read
Read Response
10.10.10.11?Port=49200
Data = xyz
Send Data To
10.10.10.10, Port 49100.
Receive Data From
Port 49200.
Data = abc
Data = xyz
The response is returned to the
controller as soon as the data is sent.
- EtherNet/IP Web 1
- Server Module 1
- Important User Information 2
- Summary of Changes 3
- Table of Contents 5
- 6 Table of Contents 6
- Table of Contents 7 7
- Appendix A 8
- Connect Over Ethernet 8
- Appendix B 8
- Table of Contents 9 9
- 10 Table of Contents 10
- Who Should Use This 11
- Publication 11
- Conventions 11
- About This Publication 11
- 12 12
- Getting Started 13
- 14 Getting Started 14
- Getting Started 15 15
- 1756-EWEB Installation 17
- 1768-EWEB Installation 18
- System Requirements 19
- Access the Module Using 19
- Your Web Browser 19
- Default Access: 20
- User Name: Administrator 20
- (not case sensitive) 20
- Password: 20
- (leave blank, no password) 20
- Navigate the Web Server 22
- Use the Web Server 23
- Access a Data View 24
- Getting Started 25 25
- Configure Email 26
- Configure the Time Server 27
- Enable/disable Other Services 28
- 30 Getting Started 30
- Web Server Module 31
- Assign Network 32
- Parameters When the 32
- Network Has a DHCP 32
- Parameters Without A 35
- DHCP Server 35
- RSWho Icon 38
- Duplicate IP Address 40
- Detection 40
- IP Address Swapping 42
- DNS Addressing 42
- Verify Network Settings 44
- Manage Module Settings 47
- Modify Network Parameters 49
- Manage Server Settings 51
- Display the Server Log 54
- About This Chapter 55
- Data Views Overview 55
- Tags Supported In Data Views 56
- Performance Estimates 56
- Create a Data View 57
- Add Tags to a Data View 58
- Monitor Data Views and 59
- Tag Data 59
- Sort Data Views 60
- Edit a Data View 61
- Create Data Views Offline 62
- Use an External 63
- Application to Access 63
- Data Views 63
- Example: Data View XML 64
- Send Email 67
- Configure the Web Server 69
- Send an Email Via the Web 70
- Send an Email with a 71
- Controller-initiated 71
- Message Instruction 71
- Enter the Ladder Logic 72
- Configure the MSG Instruction 73
- 74 Send Email 74
- Enter the Text of the Email 75
- Possible Email Status Codes 75
- 76 Send Email 76
- User Accounts and 77
- Privilege Classes 77
- Configure Access Limits 78
- For Web Pages 78
- In This Field Do This 79
- ’/user/Web/mypage.html’ 79
- Create User Accounts 80
- Recover with Unknown 81
- Password 81
- Access the Web Server’s 83
- File System 83
- File Names and Types 85
- Back Up the File System On 87
- Back Up Files 88
- Restore Files 89
- This is the /user directory 90
- Create Custom Web Pages 91
- Develop a Custom Web 93
- ASP Function Calls 93
- Read Controller Tags 94
- Read CIP Data 95
- Update Control System Data 96
- Retrieve Information About 97
- Javascript Libraries 98
- Web Page Forms and POST 102
- Handlers 102
- XML."); 103
- IMPORTANT 103
- For example, this code: 104
- HTML stream 110
- For example: 110
- Monitor Diagnostics 113
- Diagnostics Overview 114
- Network Settings 116
- Message Connections 117
- Ethernet Statistics 119
- Over Ethernet 121
- TCP Connections 123
- Additional Resources 123
- Socket Interface 125
- Architecture 126
- Socket Interface 127 127
- OpenConnection 130
- Communicate With the 132
- Socket Object Via a MSG 132
- Instruction 132
- Message Transfer Sizes 133
- Service Timeouts 134
- MSG Instruction Timeouts 134
- Socket Instance Timeouts 134
- Programming 135
- Considerations 135
- 136 Socket Interface 136
- Application Messages and TCP 137
- Partial Reads 137
- Partial Writes 138
- Socket Object Services 140
- CreateSocket 141
- MSG Source Length 142
- MSG Destination Element 142
- MSG Source Element 144
- AcceptConnection 146
- MSG Configuration Parameters 148
- MSG Source Element: 149
- DeleteSocket 153
- DeleteAllSockets 154
- Possible Error Codes for 155
- Socket Services 155
- Decimal Hexadecimal 156
- Socket Attributes 157
- 158 Socket Interface 158
- Socket Interface 159 159
- Troubleshoot Socket 160
- Applications 160
- 162 Socket Interface 162
- 164 Index 164
- Index 165 165
- 166 Index 166
- How Are We Doing? 167
- BUSINESS REPLY MAIL 168
- Rockwell Automation 170
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