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SERIAL COMMUNICATION OF CONTROL SIGNALS FOR ELEVATOR BASED ON CAN BUS

机译：基于CAN总线的电梯控制信号的串行通信。

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摘要

A 24-layer landing elevator was modified according to this method. Before the modification, every landing needed four signal lines except two terminal landings, which needed only two signal lines, one for input, the other one for output (that is N_1 =(N-2) X 4 + 2 x 2, here N_1 the number of landing calls, N the number of landings for a 24 layer-landing elevator, N_1 is 92, and the number of control signals in the lift car is N_2 = N x 2 = 48). In addition to 16 signal lines for two pieces of seven-segment display and two indicators, the elevator needs 156 signal lines together. Because the elevator has so many signal lines, its control is complex, which reduces the reliability of the elevator. After the modification by CAN bus technology, P8XC592 and PCA82C250 constitute the CAN bus node controller. The serial communication of control and displaying signals among machine room, landings and lift car could be accomplished by only four signal lines. It simplifies the system and improves the reliability of the elevator. After about half a year's operation, the modified elevator is in very good condition, and the malfunction ratio is low.
机译：根据此方法修改了24层着陆电梯。在修改之前，每个平台需要两条信号线，而两个终端平台则仅需两条信号线，一条用于输入，另一条用于输出（即N_1 =（N-2）X 4 + 2 x 2，此处为N_1） （24个层站电梯的层站数量N_1为92，而电梯轿厢中的控制信号的数量为N_2 = N x 2 = 48）。除了用于两个七段显示器和两个指示器的16条信号线外，电梯还需要156条信号线。由于电梯信号线多，控制复杂，降低了电梯的可靠性。经CAN总线技术修改后，P8XC592和PCA82C250构成了CAN总线节点控制器。机房，层站和电梯轿厢之间的控制和显示信号的串行通信仅需四根信号线即可完成。它简化了系统并提高了电梯的可靠性。经过约半年的运行，改造后的电梯处于良好状态，故障率低。

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