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High industrial availability with Xtorm Series CPU redundancy

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High industrial availability with Xtorm Series CPU redundancy

High industrial availability with Xtorm Series CPU redundancy

In industrial processes, control system reliability is a key factor in ensuring operational safety and efficiency. Critical applications that run 24/7 cannot afford unexpected interruptions. A single failure can disrupt an entire production line, lead to financial losses, and directly impact productivity and corporate reputation. To mitigate these risks, redundant architectures are widely adopted as a strategy to ensure continuous operation in case of failures. 

Among the most advanced solutions for ensuring high availability, the Xtorm Series from Altus stands out. This Remote Terminal Unit (RTU) series was designed to offer ruggedness, flexibility, and redundancy at both hardware and software levels. 

In this article, we take an in-depth look at how Xtorm’s CPU redundancy enhances safety and efficiency in critical industrial applications, protecting processes and ensuring operational stability for industries. 

CPU redundancy in the Xtorm Series

The Xtorm Series stands out for its ability to implement CPU redundancy efficiently and seamlessly. Unlike the Nexto Series, which employs a redundancy system with separate modules, Xtorm redundancy is configured directly within the same rack. 

To activate redundancy, a software configuration is required in MasterTool IEC XE (or MasterTool Xtorm for versions prior to 3.70) and the HX3040 CPUs and power supplies must be connected side by side. The synchronization of redundant data is carried out through the internal bus, eliminating the need for additional communication interfaces. This synchronization mechanism is managed by a dedicated hardware and software interface within the CPUs, ensuring a fast and reliable switchover process between primary and backup units. 

Switch-over mechanism and activation modes

Switch-over is a critical process for operational safety, allowing a backup CPU to take over immediately in case of a failure in the active unit. Several events can trigger this transition, including: 

  • Hardware failure. 
  • Power supply failure. 
  • Unexpected removal of the controller from the rack. 
  • Communication failure. 

The redundancy status can be monitored directly in the programming software and on the CPU’s LCD display, enabling precise system management. The switchover between units can be activated by the following methods:  

  • Commands from the programming software or a SCADA system. 
  • User applications detecting failures, such as Ethernet communication anomalies. 
  • Diagnostic button on Xtorm series CPUs. 

Autonomous functions and data synchronization 

One of the key advantages of CPU redundancy in the Xtorm Series is its autonomous assignment of primary and standby roles. During initialization, the CPUs automatically determine which unit will be active and which will remain on standby, eliminating the need for manual configuration.Both units run the same program and share process data, with real-time synchronization of operands through dedicated channels. These channels ensure the consistency of the following information: 

  • Redundant variables. 
  • System diagnostics. 
  • Redundant user memory. 
  • Event queue. 
  • Project and command synchronization. 
Ruggedness for extreme industrial environments

The Xtorm Series is designed to meet the most demanding industrial standards, making it ideal for applications in harsh environments. Its rugged design ensures reliable operation under adverse conditions, including:  

  • Mechanical vibrations. 
  • Wide temperature variations. 
  • High levels of electromagnetic noise. 
  • Exposure to electrostatic discharges. 

These features make the series particularly suited for power plants, powerhouse facilities, and installations near large electrical devices. 

Advanced redundancy architecture 

The Xtorm Series supports various redundancy configurations, ensuring high availability for critical industrial systems. Among the key supported architectures are: 

  • 1. CPU with Remote I/O and Loopback 

Uses two HX8300 or HX8320 modules per rack. Ensures operation even in the event of cable or expansion module failures.Ideal for systems requiring continuous maintenance and extended availability.

  • 2. CPU and power supply redundancy 

Implements hot-standby redundancy, allowing automatic switchover in case of failure. Prevents interruptions in critical processes, ensuring higher productivity and efficiency. Enables module replacement without shutting down the system. 


Enhanced connectivity with MasterTool 3.70

 The evolution of the Xtorm Series was accompanied by significant improvements in the MasterTool configuration and monitoring software. With version 3.70, MasterTool began offering full support for Xtorm RTUs, ensuring a more integrated and efficient configuration experience. This update enabled:? 

  • Expanded compatibility – The Xtorm Series can now be configured within the same MasterTool environment used for the Nexto Series, unifying the management of different automation devices.? 
  • Support for PROFINET Controller – The HX3040 CPU now supports the PROFINET Controller protocol in non-redundant mode, expanding its integration capabilities with high-speed industrial networks.? 
  • Implementation of OPC UA Server – The HX3040 CPU now also includes support for OPC UA Server in non-redundant mode, enabling efficient and secure communication with SCADA systems.? 
  • Cybersecurity enhancements – The update introduced improved data and automation infrastructure protection, reinforcing resilience against threats and unauthorized access.?

With these innovations, the Xtorm Series has solidified itself as an even more robust and versatile solution, ensuring greater reliability and flexibility in automation operations within the energy sector.? 


Ensuring operational continuity with Xtorm 

As demonstrated throughout this article, the Xtorm Series from Altus is a powerful solution for maintaining operational continuity in critical industrial systems. Its exceptional ruggedness, flexibility, and advanced redundancy mechanisms enable industries to significantly enhance the safety and efficiency of their operations. 

With this technology, companies can drastically reduce downtime, minimize costs associated with unexpected failures, and ensure a more stable industrial operation. 

If your company is looking for a redundant architecture to maximize availability and optimize industrial processes, rely on the specialized technical support of our team. Contact us through the form and discover how Xtorm CPUs can transform your industrial applications, delivering consistent and more sustainable results. 


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