ABB DSQC545A processing unit

ABB DSQC545A processing unit

    Cause of malfunction: Brake malfunction, brake opening timeout or brake not opening properly.

    Solution: Open the cover of the brake on site, force the brake coil to be opened separately in the program, observe the brake limit opening status, and if the brake cannot be opened or the mechanism is stuck, replace the brake;

    If the distance between the limit opening and the limit sensing plate is far, adjust the distance of the sensing plate and ensure its fastening (based on the author’s years of equipment management experience, the failure rate of electronic induction proximity switches is much lower than that of mechanical switches, and most important limits in our department have been improved from pre installation mechanical switches to electronic induction proximity switches);

    If the brake opens for a timeout, two methods can be used: ① If the brake opens slightly slowly, increase the delay time for opening the brake; ② The brake opens very slowly, and a new brake hydraulic push rod must be replaced at this time.

    Cause of malfunction: Invalid communication between master and slave buses.

    Solution: Check the fiber optic connection between the master and slave bus connections and between the master CH: and the slave CH:. Check if the connection is tight. If it is loose, reinsert and confirm the reliability of the connection. In addition, it is necessary to check whether the fiber optic communication is normal and whether the fiber optic head is clean. If it does not meet the requirements, it must be cleaned with precision electronic instrument cleaning agent or replaced with high-quality fiber optic.

    If all the above situations are normal but the fault cannot be eliminated, force the output coil of the frequency converter contactor to operate for about 5 minutes in the program to eliminate the fault.

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