Allen-Bradley controllogix 1756-L55M12 User Manual

Publication 1756-UM001G-EN-P - January 2007
8 Table of Contents
Chapter 9
Configure Redundancy
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . 111
ControlLogix Redundancy Overview . . . . . . . . . . . . . . . . . 111
Build a Redundant System. . . . . . . . . . . . . . . . . . . . . . . . . 113
System Considerations . . . . . . . . . . . . . . . . . . . . . . . . . 114
ControlNet Considerations in Redundant Systems . . . . . . . . 114
EtherNet/IP Considerations in Redundant Systems . . . . . . . 115
IP Address Swapping . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Redundancy and Scan Time. . . . . . . . . . . . . . . . . . . . . . . . 116
Minimum System Requirements . . . . . . . . . . . . . . . . . . . . . 116
Chapter 10
SIL 2 Certification
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
SIL 2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
SIL 2 Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Chapter 11
Maintain Nonvolatile Memory
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Choose a Controller That Has Nonvolatile Memory. . . . . . . 120
Prevent a Major Fault During a Load. . . . . . . . . . . . . . . 120
Use a CompactFlash Reader. . . . . . . . . . . . . . . . . . . . . . . . 121
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Chapter 12
Maintain the Battery
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Check If the Battery Is Low . . . . . . . . . . . . . . . . . . . . . . . . 124
Estimate 1756-BA1 Battery Life . . . . . . . . . . . . . . . . . . . . . 124
Estimate 1756-BA2 Battery Life
(1756-L6x series B controllers only) . . . . . . . . . . . . . . . . . . 126
Estimate Warning Time . . . . . . . . . . . . . . . . . . . . . . . . 127
Maintain a 1756-BATM Battery Module . . . . . . . . . . . . . . . 128
Check the BAT LED Indicator. . . . . . . . . . . . . . . . . . . . 128
Store Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Appendix A
LED Indicators
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Index

Allen-Bradley controllogix 1756-L55M12 Specifications

General

Brand	Allen-Bradley
Model	controllogix 1756-L55M12
Category	Controller
Language	English