Method for controlling converter tilting system by using S120 frequency converter

Abstract

The invention belongs to the technical field of converter tilting system control, and particularly relates to a method for controlling a converter tilting system by using an S120 frequency converter. The method comprises the following steps that S1, CBE20 communication boards are installed on CU320-2DP of four frequency converters in a converter tilting system respectively, stations 1-4 are defined for the CBE20 communication boards respectively, and are connected through a network cable, the network cable jumps from a P2 port of the station 1 to a P1 port of a station 2, and so on; S2, SINAMICS LINK related parameters in CU320-2dp are configured for each frequency converter; S3, master-slave switching is configured; and S4, band-type brake control is performed. According to the invention, by using the method, the frequency converter S120 controls the tilting system by using an SINAMICS LINK mode as a master-slave control mode through CBE20; and the frequency converter control mode is more reliable and faster than a PLC.

Description

technical field [0001] The invention belongs to the technical field of converter tilting system control, and in particular relates to a method for controlling the converter tilting system by using an S120 frequency converter. Background technique [0002] In a converter smelting cycle, the converter must be tilted forward at least three times and tilted backward once to complete the smelting process. The operation of the converter is controlled by PLC, and the operation is received. The converter tilting mechanism is driven by 4 motors, which can drive the converter body to rotate freely within the range of 360 degrees. During normal operation, the four motors run synchronously and start and stop synchronously; when one or two motors fail and stop, the PLC immediately adjusts the parameters such as the speed setting of the remaining running motors. When more than 3 motors fail and stop, the converter will stop tilting immediately. [0003] Because the converter tilting equ...

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Problems solved by technology

Moreover, the Profibus-DP bus itself has the following disadvantages: i) the data transmission speed is slow, and the maximum transmission speed of the Profibus-DP bus is 12Mbps, and is affected by the speed transmission distance; ii) the reliability of the system is not high, and the Profibus-DP bus The DP bus adopts a one-to-one connection mode, and connects the master station with all sub-stations through a twisted pair. When a certain section of the bus or a certain sub-station fails, the rest of the sub-stations may all stop working; iii ) Poor anti-interference ability, Profibus-DP bus uses shielded twisted-pair wires for communication, Profibus specifications cannot match the parameters such as internal resistance and inter-line capacitance of ordinary shielded twisted-pair wires, the system often has abnormal communication status, resulting in anti-interference The ability is not strong; iv) Fault diagnosis is difficult. Once the Profibus-DP network fails, it is difficult to find the fault point. There is a lack of effective and reliable professional testing instruments, and we can only rely on experienced maintenance personnel to troubleshoot the fault point, which not only wastes precious Production time affects production planning and increases labor costs

[0006] Due to the above shortcomings of the Profibus-DP bus, the converter tilting control system constructed using the Profibus-DP bus has unsatisfactory scalability of the Profibus bus, poor anti-interference ability of the system, and difficulty in troubleshooting. It cannot be directly connected to the TCP / IP interface. The shortcomings of low transfer efficiency and poor reliability affect the stability and rapidity of the converter tilting control system

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