DIASYS netmation


As a new source of water, Mitsubishi Power has successfully launched many water treatment plants including wastewater recycling plants and desalination plants for seawater and brine.

Based on the technology Mitsubishi Power has built-up over a long time in the field of fresh water generation and water treatment, Mitsubishi Power has successfully completed one of the world's largest seawater reverse osmosis desalination plants and delivered it to a customer.

DIASYS has been successfully installed as a control and a monitoring system in many seawater desalination plants.


  • The wide variety of the product lineup provides flexibly. We can offer optimum designs ranging from large-scale to mid- and small-scale systems.
    Our full hardware product lineup offers a wide range of solutions from compact systems to large-scale systems. DIASYS provides large-size controllers (MPS: Multiple Process Station) and small-size controllers (CPS: Compact Process Station). A distributed system can be designed and offered based on use and scale with the optimum balance between cost and performance. For geothermal power plants, DIASYS offers a control and monitoring function for steam turbines and their auxiliary facilities.
  • High reliability and easy maintenance
    DIASYS maintains high system reliability by having redundancy for its CPU data processing modules, network modules, and power units. Furthermore, the CPU modules have a substantial self-diagnostic function. In case of failure, the system switches to the backup modules without any disruptions in the system control. Additionally, the root cause of the issue is displayed to aid in taking prompt corrective action.
  • Control logic and system construction are engineered for easy expansion
    You can change and create control operation logic, create system diagrams or control loops displayed on an operator station, and add and change hardware configuration by using the maintenance tools specifically designed for DIASYS. This maintenance data is managed at one location using an integrated database to allow efficient engineering.
  • Windows-based human interface with superb operability and rich functionality
    Operator stations are easy to operate and use because they use the Microsoft Windows operating system to operate and monitor processes and manage data. Operator stations provide a variety of functions to support operation, control, and monitoring of a plant. Those functions include displaying plant system diagrams, trend graphs, control loop plates, and alarm events as well as logic monitoring.
  • Support for various communication interfaces for connecting systems from other vendors
    DIASYS supports a variety of communication protocols such as ModbusTCP/IP, OPC (OLE for Process Control), and DNP3.0. This allows DIASYS to connect to and communicate with systems from other vendors.
  • Support for various operation-assisting functions, performance calculations, and stress calculations with an excellent quality only available from a plant manufacturer
    DIASYS provides a wide variety of optional products based on Mitsubishi Power's know-how as a leading plant manufacturer. Those optional products include various operation-assisting functions, performance and stress calculation functions, and a training simulator. For details, visit the following optional products page:

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