Mitsubishi FX_2NX series PLC in during the application of the elevator signal system

1 introduction during hoist signals and the integrated protection system, is an important part of during promotion system. The pros and cons of the system performance, directly affect the safe operation of the elevator. A mine during hoisting machine is divided into two sets of hoist, a set of double cage hoisting - Double carry bottles ( Layer in operation) , double ( Don't change layer, set people up and down the abutment) And other auxiliary; Another set of single cage hoisting with balance weight - Double carry bottles ( Layer in operation) , double ( Don't change layer, set people up and down the abutment) And other auxiliary. The original signal in the system well dot blocking signal and the signal because of aging, slow or misoperation. At the same time, the rapid development of programmable controller and the mature application, as well as during promotion signal transformation provided the good condition of the system. Therefore, from the scene of the meet the needs and the perspective of convenient and flexible operation, application of programmable controller to modify it. 2 mitsubishi fx_2n PLC of mitsubishi fx_2n series programmable controller is miniaturization, high speed, high performance products, is highest in the class of fx series subminiature program unit. In addition to the input out of 16 ~ 25 independent use, can also apply to the connection between the several basic components, analog control, position control and other special purposes, is a set of PLC controller can meet the demand of varied widely. It has the following characteristics: the system configuration is fixed and flexible expansion unit is connected on the basic unit or extension module, 16 - can be performed - Flexible input/output combination of 256 points. Equipped with free choice, rich varieties can choose 16/32/48/64/80/128 point of the host, can use minimum 8 extension module. According to the power supply and the output form, the freedom of choice. Reassuring performance program capacity: built-in 800 steps ram ( To enter a comment) Can use storage box, the biggest step can be expanded to 16 k. Simple programming this system adopts the mitsubishi fx2n series PLC to realize up and down the well's mouth in various operations. Well as fx_2n128mr, wellhead for fx_2n80mr, garage for fx_2n48mr besides tight stop signal separately the various operations and signal processing are completed by programmable controller system constitute a system block diagram is shown in figure 1, 3 by the garage on the display system, wellhead signals wellhead under the operating system and operating system of three parts. 3. 1 garage display system garage system is mainly to complete the process of ascension in all kinds of signals, including men, extract, stop and change the layer, such as maintenance, according to the characters of fast, fast, slow, slow down and stop under the Chinese characters and figures show that three times improve signal corresponds to the digital memory, increase the number of hook cumulative display and so on. Of fast, fast, slow, slow down and stop the five kinds of signals at the same time with the digital signal to the corresponding audio signal, such as dot signal is 4, is to should have four audio signal. When the emergency stop has on the wellhead, the wellhead, garage across the sound alarm signal. Various and atresia of hoist control circuit signal on the garage display system control cabinet, to access all the control loop, easy to maintain and repair. 3. 2 on the wellhead signal operating system on wellhead signal function of the operating system is mainly according to the need of the promotion task to garage signal corresponding rbis, and complete the corresponding functions of transformation, such as, extract, changing layer, maintenance, etc. According to the demand of coal mine safety regulation in the process of ascension, the wellhead signals must be made on wellhead forwarding, where each ascending, wellhead under the first upward wellhead signal dot, on the mouth of the well and then a corresponding signals, and spread to the garage, at the same time the corresponding figures shown on the operation panel and a corresponding number of audio signals. If the signal from the wellhead and the wellhead, the signal will not be able to send out, accordingly on the operation panel display and sound signal. But when wellhead lower personnel, regardless of the wellhead signal what ascension, are subject to carry people, namely the wellhead pelethites signal can be sent directly to the garage, implement the pelethites operation. In this system, whether people or extract, only the position of switch person and the right, some signal is valid. Once the signal correctly, in addition to the emergency stop signal, system will lock all kinds of signals, ensure the safety of the ascension. When need to change layer, as long as puts in layer switch in position, hoist set according to the layer in the speed. In the system maintenance, puts the access switch overhaul location, the elevator will be in accordance with the access speed. On a variety of signal from the wellhead to garage, provide the driver with driving signal. In ascension when no signal, winch can't open the car. In the direction of the signal in the system is also equipped with ascension atresia, winch can only drive in the right direction. In the system if the fluctuation of the wellhead atresia and hold car signal abnormalities, flashing the corresponding will flash on the screen, so as to find and solve problems timely. For the convenience of the contact, up and down the well's mouth in the system set up liaison signal action buttons, all kinds of contact was achieved by this button. When signal system maintenance or malfunction of PLC, the system can be set by all kinds of driving signal from the standby signal system, to ensure the normal operation of the hoisting system.
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