The elevator control technology development, has always been closely linked with the development of safety technology. The focus of today's elevator safety electrical control-loop control of electrical safety. Its concrete manifestation of the grounds of safety-critical control point set of security contacts and safety circuit electrical safety loop elevator drives master electrical control connected directly to the hardware. This circuit structure can effectively prevent the threat of electromagnetic interference, software bugs elevator key security control link, to ensure the reliability of the electrical part of the elevator safety-critical control.
Electrical structure design of the elevator control, electrical safety loop control of the drive unit main electrical connection, there is some indirect connection through software design. Especially the electrical safety circuit of the door lock contacts, often due to various reasons in the electrical circuit of the direct control of the drive unit main electrical. Some designers too much emphasis on the reliability of the microcomputer, ignore the seriousness of the consequences of the electrical safety loop control points mistakes, the door control drive unit main electrical contacts through the program controller indirect, such control accident interference cause serious danger, there are a number of facts show that this danger.
Drive unit, the brake control appliances such critical control electrical fault protection is a focus of the elevator safety control. Drives, electrical brake control runaway may directly causing the car to open the door state movement, prone to shear accident. Therefore, you must monitor the effectiveness of such electrical work. The critical electrical double sets of independent control and fault detection is to guarantee the security necessary means.
Electrical structure design of the elevator control, electrical safety loop control of the drive unit main electrical connection, there is some indirect connection through software design. Especially the electrical safety circuit of the door lock contacts, often due to various reasons in the electrical circuit of the direct control of the drive unit main electrical. Some designers too much emphasis on the reliability of the microcomputer, ignore the seriousness of the consequences of the electrical safety loop control points mistakes, the door control drive unit main electrical contacts through the program controller indirect, such control accident interference cause serious danger, there are a number of facts show that this danger.
Drive unit, the brake control appliances such critical control electrical fault protection is a focus of the elevator safety control. Drives, electrical brake control runaway may directly causing the car to open the door state movement, prone to shear accident. Therefore, you must monitor the effectiveness of such electrical work. The critical electrical double sets of independent control and fault detection is to guarantee the security necessary means.