(This paper introduces the function, software and hardware design scheme and termination principle of the central control device CCU. This device is based on MVB network communication and is one of the key devices in the TCN network control system. It integrates MVB network communication function, MVB bus management function, network configuration and supervision function, and graphical programming function, and supports user network communication configuration, development of control software and diagnosis software. Users can use the network configuration monitoring software NCMS to monitor the CCU)
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