Preface
This manual is a reference to the hardware components, configuration and operation of the Hot Standby CPU Redundancy system for the Series 90t-70 Programmable Logic Controller. This redundancy system is one of several redundancy alternatives that may be incorporated into a Series 90-70 Programmable Logic Controller system (see AppendixA).
The information in this manual is intended to supplement the information contained in the system installation, programming, and configuration information found in the manuals listed below under ºRelated Publicationsº.
Content of this Manual
Chapter 1. Introduction: describes the basic system features of the Hot Standby CPU Redundancy system Control Strategy, and provides an overview of system components, configuration, and operation.
Chapter 2. Components: describes the hardware components for the Hot Standby CPU Redundancy system.
Chapter 3. Configuration: describes the special configuration requirements of a Hot Standby CPU Redundancy system and provides an example of system configuration.
Chapter 4. Operation: describes the operation of a Hot Standby CPU Redundancy system, fault detection and actions taken, and the on-line repair of a failed component.
Appendix A. Redundancy Alternatives: describes the redundancy alternatives for the Series 90-70 Programmable Logic Controller for those readers not familiar with those alternatives.
Related Publications
For more information, refer to these publications:
GeniusI/OSystemUser's Manual (GEK-90486-1). Reference manual for system designers, programmers, and others involved in integrating Genius I/O products in a PLC or host computer environment. This book provides a system overview, and describes the types of systems that can be created using Genius products. Datagrams, Global Data, and data formats are defined.
Genius Discrete and Analog Blocks User's Manual (GEK-90486-2). Reference manual for system designers, operators, maintenance personnel, and others using Genius discrete and analog I/O blocks. This book contains a detailed description, specifications, installation instructions, and configuration instructions for discrete and analog blocks.
Series 90-70 PLC Installation Manual (GFK-0262). This book describes the hardware components in a Series 90-70 PLC system, and provides the details of system installation.
Logicmaster 90-70 ProgrammingSoftwareUser's Manual (GFK-0263). A programming software user's manual for system operators and others using the Logicmaster 90-70 software to program, configure, monitor, or control a Series 90-70 PLC system.
