CODESYS Redundancy – Fail Safe Controller Applications Developed with the IEC 61131-3 System CODESYS

With the redundancy extension for the IEC 61131-3 programming system CODESYS Development System you can develop redundant controller systems. Two independent industrial controllers simultaneously execute one and the same IEC 61131-3 application while constantly controlling and synchronizing each other. In case of a failure, the passive controller automatically turns into the active controller and operation is continued without interruption. Only the active controller communicates with the I/O system.

Features

Library functions for the IEC 61131-3 programming environment CODESYS Development System
Plug-in components for the CODESYS Development System for configuring the redundancy functionality
Additional component for CODESYS Control
Support of I/O systems such as EtherCAT®, CANopen® and proprietary I/O systems
Development support for the implementation of CODESYS Redundancy

Details

Requirements for Redundant CODESYS Controllers

Access to the CODESYS Control Runtime System implementation required (This means, device manufacturers can only realize CODESYS Redundancy with their own automation devices.)
Possible fieldbuses
- EtherCAT with an integrated CODESYS EtherCAT solution
- Proprietary I/O systems via an interface for proprietary I/O drivers
Direct connecting interfaces between the two controllers

Functional Overview

Tested boot-up mechanism for both controllers
Configuration of the IP addresses and the timeouts of the controllers
Automatic synchronization and update of the redundant controllers with implicitly called CODESYS library functions – even if one of the controllers is replaced by another controller
Reaction to errors in the IEC 61131-3 application program
Switch between the controllers via function calls from the IEC application or from the device manufacturer runtime system component (for example when monitoring the temperature of a process, upon a fieldbus diagnosis errors or for manual switching via the visualization etc.)
Recording of relevant events
Synchronization of debugging information, like for example forced variables on both controllers
Automatic registration of memory areas to be used by both controllers
Private memory areas for each controller, for example for diagnosing the local bus connection
Time synchronization of the IEC timers (TIME, TON, TOF,…)
Rules for the implementation of redundant controller applications available

Howtoget

You are a system integrator or a user in the machine/plant construction sector or the like:
All you have to do is use a controller already equipped with CODESYS Redundancy.
You are a manufacturer of programmable devices:
Buy the CODESYS Redundancy Runtime Toolkit and implement your own redundant IEC 61131-3 controller.
For more information or an offer please contact our sales department under info@emea.com.tr