AB Cat. No. 1785-CHBM ControlNet PLC-5 Hot Backup System

Compatibility Advantage: The system has good compatibility with hardware and software. In terms of hardware, it supports many types of I/O.

System Overview

Purpose: Improve equipment running time, reduce costs due to equipment failure, guarantee high availability of control applications, and ensure the continuity of the production process.

Architecture: Consists of a pair of PLC-5/40 or PLC-5/80 ControlNet programmable controllers (Series F, Revision A or higher), two 1785-CHBM/A ControlNet Backup Cards, two 1771 Chassis, two 1771 Power Supplies, one or more ControlNet I/O Adapters, ControlNet network cables and associated software components.

Principle of operation: The primary PLC-5 controller controls the ControlNet I/O, and the backup PLC-5 controller takes over control in the event of a primary controller failure. Through the ControlNet network, the controllers communicate with each other and exchange status information to achieve the backup function.

Installation Configuration

Hardware Installation: Set the ControlNet node address of the PLC-5 processor (consecutive and odd first), install the processor, backup card, power supply, connect to the ControlNet network, and finally set the key switch to the Program mode and turn on the power.

System Configuration: There are two types of configurations: same application and different application, both of which need to reconfigure the ControlNet I/O, set up handshake messages, save the configuration and set up the hot standby parameters.

Advanced Configuration Options: Including synchronous and asynchronous programme scanning, equivalence checking, data cross loading, forced switching, system status checking, etc., which can be selected and configured according to requirements.