Rockwell-automation 1775-MX_S4A,D17756.3.1 User Manual PLC-3 BACKUP CO Manual de usuario Pagina 27
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- Tabla de contenidos
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Valorado. / 5. Basado en revisión del cliente
Installing a Backup System
Chapter 2
2-12
Figure 2.10
Backup
Cable W
iring for Scanner Backup with Automatic Switchover
with Controllable Switchback (Cat. No. 1775CBB)
1
3
2
4
5
6
1
3
2
4
5
6
1775CBB
BACKUP
CABLE
SCANNER #1
BACKUP
CONNECTOR
SCANNER #1
BACKUP
CONNECTOR
PRIMARY
PROCESSOR
BACKUP
PROCESSOR
SWITCH
SHIELD
10977I
CAUTION: To guard against damage to equipment, make sure
that:
switch 2 closes within 8 milliseconds of switch 4
switch 3 closes within 8 milliseconds of switch 1
CAUTION: If these conditions are not satisfied when you
throw the switch to change the processor that is designated as
the primary processor to the processor currently controlling
outputs, the new primary processor may fault.
- Backup Systems 1
- Important User Information 2
- Table of Contents 3
- Table of Contentsii 4
- Manual Objectives 5
- Audience 5
- What This Manual Contains 5
- WARNINGS, CAUTIONS and 6
- Important Information 6
- Terms and Conventions 6
- Related Publications 7
- Chapter 8
- Chapter Objectives 8
- Backup Concepts 8
- Chapter 1 10
- Configuration 11
- Choosing a Backup 11
- Choosing a Switchover 14
- Installing a Backup System 16
- Chapter 2 17
- Power Supply Considerations 21
- Grounding Considerations 21
- Shielding Considerations 21
- Configuring the I/O Chassis 22
- Configuring Scanner Modules 23
- Connecting the I/O 30
- Channel Wiring 30
- Configuring 1775MX Memory 39
- Communication Modules 39
- Operating a Backup System 41
- Chapter 3 42
- Figure 3.1 44
- Table 3.B 45
- Restarting 45
- Procedure Selection 45
- Using the 1775MX 48
- Memory Communication Module 48
- Table 4.A 49
- Chapter 4 50
- Using LIST Functions 50
- Using Message Instructions 64
- Error Codes 80
- Timers and Counters at 83
- Switchover 83
- Timing Considerations at 84
- Reducing Backup 87
- Communication Overhead 87
- Using Data Table Status Bits 90
- Data Highway Plus 97
- Programming Techniques 100
- Chapter 5 100
- Programming Considerations 103
- Diagnosing Faults 105
- Chapter 6 106
- Locating a Fault 106
- A Logic Diagnostic Routine 112
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