Safety-brake PLC (Programmable Logic Controller) control system with self recognition and control method thereof

Abstract

The invention discloses a safety-brake PLC (Programmable Logic Controller) control system with self recognition and a control method of the safety-brake PLC control system. The system comprises an incremental type encoder, a safety brake control unit and an operation unit, wherein the incremental type encoder is used for acquiring rotating-speed signals of a high-speed shaft and a low-speed shaft; the safety brake control unit comprises a PLC, a control output module and a voltage-stabilizing power supply; the PLC is used for carrying out logic operation analysis on the acquired rotating-speed signals and outputting corresponding logic control commands to the control output module according to a logic operation analysis result; and the control output module acts according to the received logic control commands and controls a working brake or a safety brake to act. The safety-brake PLC control system and the control method disclosed by the invention have the advantages that the potential hazards of faults can be found in time, the possibility of false operation of the safety brake is reduced, the damage of protective action to a mechanical structure is greatly reduced, the debugging is simple and convenient and the use efficiency of the safety brake is improved.

Description

technical field [0001] The invention belongs to the technical field of industrial control, and in particular relates to a self-identifiable PLC control system for a safety brake and a control method thereof, which can be applied to industrial sites of foundry cranes where a PLC controls a safety brake. Background technique [0002] Foundry cranes are used in the metallurgical industry and their task is to transport molten steel for smelting furnaces. Generally, casting cranes have five mechanisms: main lifting, auxiliary lifting, cart, main trolley, auxiliary trolley mechanism, the motor is installed on the high-speed shaft, the reel is installed on the low-speed shaft, and the high-speed shaft and low-speed shaft pass through the reducer connected. The traditional hoisting mechanism brake is set on the high-speed shaft, which is called the working brake. In this case, if one of the transmission links between the high-speed shaft and the low-speed shaft fails, the main hoi...

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Problems solved by technology

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a self-identifying PLC control system for safety brakes to solve the limitation of the protection range of the traditional control method provided by the prior art and the large damage to the mechanical structure of the protection and the current The PLC control principle is complex and requires high requirements for debuggers

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