Rockwell Automation 1785-CHBM ControlNet PLC-5 Hot Backup System User Manual - Manual (Page 5)

1 Publication 1785-UM024B-EN-P - January 2003
Preface
Manual Objectives This manual shows you how to set up and apply a ControlNet TM
PLC-5
®
Hot Backup system. A backup system requires a pair of
standard PLC-5/40 TM or PLC-5/80 TM ControlNet programmable
controllers (Series F, Revision A or higher), with I/O remotely
connected to both PLC-5s via ControlNet.
Using ControlNet, the PLC-5s communicate with each other and with
ControlNet remote I/O to create a PLC-5 backup system that provides
high availability of control applications, where it is essential for
process continuity.
In this manual, we describe the following details of the ControlNet
Hot Backup system:
• system concepts
• required hardware and software components
• installation and configuration procedures
• system operation
• troubleshooting and diagnostics procedures
• system design considerations
Who Should Use This
Manual Before you read this manual or attempt to use the ControlNet PLC-5
backup system, you should be familiar with the use and operation of
the ControlNet PLC-5 programmable controller. You should also be
familiar with:
• Remote I/O
• the ControlNet network
• RSLogix 5
TM programming software
• RSNetWorx
TM for ControlNet software
• RSLinx
TM communications software
IMPORTANT
For the ControlNet PLC-5 programmable controllers
to operate in backup mode, each PLC-5 must have a
new ControlNet Backup Cartridge (Cat. No.
1785-CHBM) inserted into its EEPROM memory
module slot.