Air conditioning system reliability

Solutions for air conditioning system reliability

Our products in the MELSEC iQ-R/iQ-F controller series make it possible to build a highly flexible air conditioning system using BACnet®, which is a common network protocol in the building automation field. The iQ-R series duplicates each layer of monitoring (SCADA) and the controller network, and also supports a redundant system ensuring high reliability.

Explore our solutions in detail

The MELSEC redundant system ensures the reliability of critical equipment, such as chillers, that cannot be shut down during data center operations. The system is built with general-purpose products, therefore it can be easily maintained and updated after installation. Furthermore maintenance is possible without stopping the system through tool-less online unit replacement. Another advantage is the possibility of adding slave-stations online. 

    By connecting a tracking cable capable of extending the distance between the redundant systems to 550 m, the control system and the standby system can be separated. It can be located at a distance, on the control panel. The optical fibre tracking cable is not affected by noise and enables high-speed data communication. The system switching time is reduced to 10 ms or less, and high-speed system switching from the control system to the standby system enables continuous control with higher reliability.

    MELSEC iQ-R/iQ-F Series also supports the BACnet® and MODBUS® open networks. Enabling integrated management of various air conditioning system devices and equipment, the MELSEC iQ-R/iQ-F Series offers optimal system operation.

    • BACnet® - open network in the building air conditioning field. Enables integrated management of devices and equipment related to building maintenance, including lighting, cooling/heating, and security management systems.
    • OPC UA - In data centers demanding high security, OPC UA security features such as certificates, encryption, and signatures can be arbitrarily configured according to system requirements to enable secure and reliable data communication.
    • MODBUS® supports master and slave functions, and for the master, uses dedicated instructions to control slave equipment.