Hot standby redundancy central control panel used for screen door

Abstract

The invention discloses a hot standby redundancy central control panel used for a screen door, which comprises filtering isolation circuits, isolation control circuits and two programmable logic devices, wherein each programmable logic device comprises a clock module, an input signal processing module, a decoding module, a logic control module, a communication module and an output signal processing module; each logic control module can monitor a working state of the other programmable logic device through each communication module; the working modes of the two programmable logic devices are controlled by operation; under the normal condition, the two programmable logic devices work by turns; and when one of the programmable logic devices breaks down, the other programmable logic device is switched automatically and works continuously. The central control panel can control the out-of-control time of the screen door due to a failure to be shortest, so that the running safety of a train is improved.

Description

technical field [0001] The invention relates to a central control panel of a screen door, in particular to a central control panel with a hot backup redundant function. Background technique [0002] The existing train screen door controller basically adopts the working mode of cold standby: using two sets of the same programmable logic device, when one set of programmable logic devices fails, it is necessary to manually switch the faulty programmable logic device to another group programmable logic devices. There are many defects in this kind of cold backup working method. Since the entire side door of the platform will be controlled by the screen door controller, the entire side screen door will be in an uncontrolled state from the occurrence of a fault to the manual switchover, causing serious damage to the train. In addition, when the screen door fails, it must first be judged whether the fault is caused by the fault of the programmable logic device. If the screen door f...

AI Technical Summary

Problems solved by technology

There are many defects in this kind of cold backup working method. Since the entire side door of the platform will be controlled by the screen door controller, the entire side screen door will be in an uncontrolled state from the occurrence of a fault to the manual switchover, causing serious damage to the train. In addition, when the screen door fails, it must first be judged whether the fault is caused by the fault of the programmable logic device. If the screen door fault is caused by other faults, the operator will switch the programmable logic device, which may present other malfunctions or hazards

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