Rockwell-automation 1775-MX_S4A,D17756.3.1 User Manual PLC-3 BACKUP CO Instrukcja Użytkownika Strona 22
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Installing a Backup System
Chapter 2
2-7
You must configure all I/O chassis for backup mode operation. Each I/O
chassis has eight switches. Two of the switches, switches 2 and 8, are
especially important because they affect the operation of a backup system.
See Figure 2.4 for the function and location of the I/O chassis switches.
Figure 2.4
Location
and Function of I/O Chassis Backplane Switches
1
2
3
4
5
6
7
8
Outputs of this I/O chassis remain in their last state when
a fault is detected by this I/O adapter.
Outputs of this I/O chassis are turned off when a fault is
detected by this I/O adapter.
ON
Switch
1. CAUTION: If you set this switch to the ON position, when a fault is detected, outputs connected to this
chassis remain in their last state to allow machine motion to continue. We recommend that you set
switch 1 to the OFF position to de - energize outputs wired to this chassis when a fault is detected.
2. The 1771 - AS adapter does not support 1 - slot or 1/2 - slot addressing. When you use this
adapter, set switches 5 and 6 to the OFF position.
3. The 1771 - ASB series A adapter does not support 1/2 - slot addressing.
NOTES:
Pressed in
attopClosed(ON)
Pressed in at
bottom Open (OFF)
5
OFF
ON
OFF
ON
6
OFF
OFF
ON
ON
2-slot
1-slot
1/2 - slot
Not allowed
Switches
1
1
OFF
Last State
The I/O chassis can be restarted from
the processor.
The processor is locked out from
restarting the I/O chassis after a fault.
ON
Switch
2
OFF
Processor Restart Lockout
Always On
Always On
Addressing
2
2, 3
16191
OFF
ON
Configuring the I/O Chassis
- 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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