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Rockwell Automation Publication 1756-UM001O-EN-P - October 2014 179
Redundant Systems Chapter 12
Enhanced Versus Standard Redundancy
While the enhanced and standard redundancy systems operate in a similar
manner, there are some key differences between the two platforms. Ta b l e 4 7
compares the enhanced and standard redundancy system features.
Build a Redundant System
To build a typical redundant system, perform this procedure.
1. Install a ControlLogix chassis and power supply.
2. To the primary chassis, add 1756-L6x or 1756-L7x controllers.
You cannot mix 1756-L6x and 1756-L7x controllers in the same chassis.
3. Add one or more ControlNet or EtherNet/IP communication modules.
4. Add one redundancy module.
5. Configure a secondary chassis that is identical to the primary chassis.
6. Connect the redundancy modules in the chassis.
7. Add I/O modules to ControlNet or EtherNet/IP networks.
8. Add operator interfaces to ControlNet or EtherNet/IP networks.
For detailed information to design and build an enhanced redundant system, see
the ControlLogix Enhanced Redundancy System User Manual, publication
1756-UM535
.
Table 47 - Comparison of Enhanced Redundancy to Standard Redundancy
Feature Enhanced
System
(1)
(1) Availability of some features that are supported in enhanced redundancy is dependent on the system revision used. For more
information, see ControlLogix Enhanced Redundancy System User Manual, publication 1756-UM535
.
Standard
System
Supports enhanced ControlLogix ControlNet and EtherNet/IP communication
modules, for example, the 1756-CN2/B or 1756-EN2T modules
Supports standard ControlLogix ControlNet and EtherNet/IP communication
modules, for example, the 1756-CNB/D or 1756-ENBT modules
Compatible with the single-slot 1756-RM redundancy modules
Compatible with the double-slot 1757-SRM redundancy modules
Support for all 1756-L6x and 1756-L7x ControlLogix controllers
Use of ControlLogix- system components, for example, the 1756-L63XT controller
and the 1756-CN2XT module
Availability of I/O over an EtherNet/IP network, including Redundant I/O systems
IMPORTANT
Components in the redundant chassis pair must be identical in
module configuration.
- ControlLogix System 1
- Important User Information 2
- Summary of Changes 3
- New and Updated 3
- Information 3
- Table of Contents 5
- Chapter 4 6
- Chapter 5 6
- Communication Networks 6
- Controllers 7
- Appendix B 10
- History of Changes 10
- Studio 5000 Environment 11
- ControlLogix Controllers 11
- Overview 11
- Before You Begin 14
- Additional Resources 15
- . To order paper copies of 17
- Chapter 1 19
- 1756-L7x Controller Parts 21
- Installation 22
- Insert the Controller 23
- Insert the Key 24
- Install the SD Card 25
- Remove the SD Card 26
- –Leave an SD card installed 27
- 1784-SD1 or 1784-SD2) 27
- Install the ESM 28
- Uninstall the ESM 29
- Logix 55xx 31
- Chapter 2 33
- Logix 5563 35
- CompactFlash Card 36
- Installation and Removal 36
- Battery Connection 39
- Remove the Controller 44
- Start Using the Controller 45
- Connect to the 46
- Configure the USB Driver 47
- Virtual Chassis Driver 48
- USB Port Driver 48
- To Workstation 49
- To Controller 49
- To Workstation To Controller 49
- Configure the Serial Driver 50
- Upgrade Controller Firmware 52
- Obtain Controller Firmware 53
- 6. Click Yes 57
- The firmware upgrade begins 57
- Set the Communication Path 58
- Go Online with the Controller 58
- Download to the Controller 59
- Upload from the Controller 60
- Choose the Controller 62
- Operation Mode 62
- Load or Store to the 65
- Memory Card 65
- Load from the Memory Card 68
- Use ControlLogix Energy 70
- Storage Modules (ESMs) 70
- Estimate the ESM Support 72
- Maintain the Battery (Only 72
- 1756-L6x Controllers) 72
- Battery Storage and Disposal 77
- Design a ControlLogix System 81
- ControlLogix Controller 82
- Features 82
- Memory Options 83
- Electronic Keying 84
- POINT I O 86
- ControlNet Network 89
- DeviceNet Network 92
- Data Highway Plus (DH+) 95
- Network Communication 95
- Universal Remote I/O (RIO) 97
- Foundation Fieldbus 98
- HART Communication 99
- Chapter 6 101
- 1756-L6x Controller 102
- Serial Port 102
- Communication with 103
- Serial Devices 103
- DF1 Master Protocol 104
- DF1 Point to Point Protocol 105
- DF1 Radio Modem Protocol 106
- DF1 Radio Modem Limitations 107
- DF1 Slave Protocol 109
- DH-485 Protocol 110
- EXTERNAL 111
- ASCII Protocol 112
- Configure the 1756-L6x 113
- Controller for Serial 113
- Communication 113
- Broadcast Messages Over 115
- Modbus Support 118
- Chapter 7 119
- Connection Overview 119
- Produce and Consume 119
- (Interlock) Data 119
- Send and Receive Messages 121
- Calculate Connection Use 122
- Local Connections 123
- Remote Connections 123
- Connections Example 124
- I/O Modules 127
- Remote I/O Modules 129
- Chapter 8 I/O Modules 130
- I/O Modules Chapter 8 131
- Distributed I/O 132
- Reconfigure an I/O Module 135
- Add to the I/O Configuration 137
- While Online 137
- Determine When Data is 141
- Develop Motion Applications 143
- Motion Overview 144
- Obtain Axis Information 144
- Program Motion Control 145
- Develop Applications 147
- Figure 29 - Tasks 149
- Programs 151
- Figure 33 - Programs 152
- Routines 154
- Parameters and Local Tags 155
- Extended Properties 156
- Programming Languages 158
- Add-On Instructions 159
- Access the Module Object 160
- Monitoring Controller Status 161
- Monitoring I/O Connections 162
- Timed Out 163
- I/O Module Properties 164
- System Overhead Time Slice 165
- Sample Controller Projects 167
- Using the PhaseManager Tool 169
- Minimum System 171
- Requirements 171
- State Model Overview 171
- How Equipment Changes States 172
- Manually Change States 173
- PhaseManager Tool versus 174
- Other State Models 174
- Equipment Phase 174
- Instructions 174
- Redundant Systems 175
- System Requirements 177
- System Considerations 178
- Build a Redundant System 179
- ControlNet Considerations 180
- EtherNet/IP Considerations 180
- Redundancy and Scan Time 181
- Chapter 12 Redundant Systems 182
- Troubleshoot the Module 183
- Fault Type Determination 185
- 1756-L7x Controller Status 186
- Display and Indicators 186
- 1756-L7x Controller 186
- Status Display 186
- Fault Messages 187
- Table 49 - Fault Messages 188
- Major Fault Messages 189
- I/O Fault Codes 191
- Status Indicators 195
- 1756-L6x Status Indicators 196
- I/O Indicator 197
- FORCE Indicator 197
- RS232 Indicator 197
- BAT Indicator 198
- OK Indicator 198
- No changes documented 201
- Revision not published 202
- Numerics 203
- Rockwell Automation Support 212
- Documentation Feedback 212
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