ABB 5SHX0660F0001 Main control board

ABB 5SHX0660F0001 Main control board

    Remote station communication failure

    Due to the structural characteristics of redundant communication in the remote station of the system, under normal circumstances, the main communication card in the electronic room is in a green light always on state, and the red light also remains in a constant on state; However, the backup communication card only keeps the green light on and does not have a red light to indicate a warning. During this period, operators are unable to operate or change component parameters of the above-mentioned equipment, otherwise it may cause tripping and shutdown.

    Node bus failure

    The material of node bus is usually coaxial cable, so as long as one cable is disconnected, the communication of all devices on the bus will be paralyzed, causing serious phenomena such as data loss, equipment shutdown, and operation interruption, which may ultimately cause huge losses directly or indirectly. Frequent plugging and unplugging of coaxial cables can lead to poor contact and signal interruption. Excessive contact resistance can also have an impact on communication lines, and a large data load during transmission can lead to a decrease in data accuracy.

    To solve the above problems, dual redundancy can be used, but the cable connection should be located behind the module to ensure that the coaxial cable is not adversely affected by mechanical operation. Only perform unplugging and unplugging when maintaining the node bus, and multiple unplugging and unplugging are prohibited unless there are other special circumstances. Ensure that the contact resistance of the circuit is at a normal level and regularly check the resistance of the circuit

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