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System Architectures > Backup System
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Backup System
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APAX-5000 system backup function significantly decreases the risk that system fails when the controller crashes. Two controllers with same control program are installed in one system. One of them will be automatically delegated as master controller and execute the control program. When master controller fails, the other controller automatically takes over control responsibility and re-start control process.
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The Benefits of Backup System
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- Two controllers to backup each other, avoiding unexpected system failure
- Provides a more reliable and safe system
- Keeps process control operating normally & continuously
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If the master controller fails, the backup controller will automatically take over control tasks.
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APAX-5570 Series Backup System
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If the master controller fails, the backup controller will automatically take over control tasks.
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Target Market: Environment and Facility Monitoring System
- Tunnel Monitoring Market Characteristic (Air Quality, Lighting, Alarm)
- River Pumping Station Market Characteristics
- (Optional) Waste Water Treatment Market Characteristics
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- Market Characteristics and Requests
Environment and facility monitoring systems (EFMS) are essential for the public safety. Typical examples include tunnel monitoring, river pumping stations and waste water treatment. These applications are usually related to government public engineering projects, designed by government departments or engineering companies.
For the tunnel monitoring, the major tasks involve control air quality and lighting control. For river pumping stations, its purpose is to avoid floods when heavy rain falls in the city. So the water level of the river inside the city should be monitored carefully. When the water level exceeds safety limit, the pump in the local river pumping station must start.
I/O functions for these applications are usually very simple. The main challenge is to integrate I/O control with audio and video surveillance. Since these applications are related to public safety, the controller must work all the time. Therefore, controller reliability is a key issue. Advantech’s APAX backup system has two controllers, installed with the same control algorithm. One controller will automatically become the master controller, and the backup controller will take control responsibility when the master controller fails.
Environment and facility monitoring are typical SCADA applications. There are many RTU controller stations installed at each area. Communication interface is another critical function that can people can monitor and control remotely.
- Why APAX is suitable for this market?
APAX-5000 architecture provides two independent controllers, and each controller has its own processor, power supply, communication ports and backplane. It is a warm-start backup system. With two APAX-5520KW controllers, the backup system features a compact size that features easy installation and configuration. Adding a powerful APAX-5570XPE or APAX-5571XPE with two APAX-5520KW backup systems, all functions including I/O control, audio and video application can be covered.
- How APAX is suitable for this market?
APAX backup systems include one controller (the master controller) that will execute control functions, while the other controller (the backup controller) continues monitoring the master controller. When the backup controller can’t receive messages from the master controller, the program will automatically run on the backup controller, making the backup controller the master controller. Since all mechanisms are automatic, it can be operated in an unmanned environment. This makes the system much more reliable because the system won't be stopped if the controller fails.
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