ABB DSQC679 Drive unit
Four workstations are responsible for setting and monitoring parameters such as speed, tension, temperature, and switch quantity for each section, and belong to the operation station. (4) The main drive of the straightening machine is composed of four motors. In the sheet metal processing production line, the control requirements for the straightening machine are very high, requiring high-precision tension and speed to achieve the goal. This production line adopts load distribution control technology. (5) Correction and centering: The eccentricity of the centerline during the steel strip conveying process is controlled by the centering system and the centering system. The high-precision servo hydraulic valve of the centering and centering device forms a closed loop by referring to the given value and the detector detection value, and the error range is controlled within 0.1%.
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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