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Anonymous users2024-02-08Overview of the elevator.
The advantages of using PLC to control the four-story elevator.
The topic of system design.
Scheme and analysis of system control.
Schematic diagram of the four-story elevator control system.
3.System hardware design.
Selection of programmable controller (PLC).
PLC Overview.
Selection of PLC.
Selection of frequency converters.
Selection of motors.
Design of PLC external circuits.
1. Alarm system design.
4. System software design.
Overview of PLC ladders.
How to operate the programming software.
Analysis of the working process of the system.
Control system programming.
Door opening and closing control and protection safety protection.
The elevator internal command and external call signal registration elimination and display loop call bell control and fault alarm.
The fire operation circuit of the elevator on the fourth floor.
Conclusions. Thanks.
References There is a manual for this and.
Elevator control program.
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Anonymous users2024-02-07I don't know what kind of control you need, most of the current single-chip microcomputer motherboards, in addition to inverters.
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Anonymous users2024-02-06How does an escalator work and what should it take to take precautions?
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Anonymous users2024-02-05The two ends of the traction rope are respectively connected with the car and the counterweight, wound on the traction wheel and the guide wheel, the traction motor drives the traction wheel to rotate after changing the speed through the reducer, and the traction force generated by the friction between the traction rope and the traction wheel realizes the lifting movement of the car and the counterweight, and achieves the purpose of transportation.
The guide shoe fixed on the car can reciprocate along the fixed guide rail installed on the wall of the building hoistway to prevent the car from deflecting or swinging during operation. The normally closed block brake releases the brake when the motor is working, makes the elevator run, brakes in the case of power failure, makes the car stop lifting, and maintains its static state on the designated landing station for personnel and goods to enter and exit.
The car is a box component that carries passengers or other loads, and the counterweight is used to balance the car load and reduce the power of the motor.
The compensation device is used to compensate for the tension and weight changes in the traction rope movement, so that the load of the traction motor is stable and the car can be docked accurately.
The electrical system realizes the control of the elevator movement, and completes the floor selection, leveling, speed measurement and lighting work at the same time.
Instruct the call system to display the direction of movement of the car and the location of the floor at any time. Safety devices ensure the safety of elevator operation.
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Anonymous users2024-02-04Summary. Hello, I am glad to answer for you, the significance of the optimization of the electrical control system of the elevator is that the elevator control requires stability and safety. Low fault, and PLC can meet the technical requirements of elevator electrical control, from the perspective of safety, PLC is more stable and efficient than relays, more cost-effective than other control methods, and has good stability.
The basis and significance of the optimal design of the electrical control system of the elevator.
Good. Hello, I am glad to answer for you, the significance of the optimization of the electrical control system of the elevator is that the elevator control requires stability and safety. Low fault, and PLC can meet the technical requirements of elevator electrical control, from the perspective of safety, PLC is more stable and efficient than relays, more cost-effective than other control methods, and has good stability.
In the early days, most of the relay logic circuits were adopted, the wiring was complex, the failure rate was high, and now it has been replaced by the programming controller and the microcomputer, and the processing of the input and output signals is realized through the software, which is convenient for design, good versatility and reliable operation.
What is the current situation and personal opinion at home and abroad on the optimal design of the electrical control system of the elevator?
The development trend of elevator traffic configuration at home and abroad can be summarized in a few sentences: from statistical characteristics to dynamic characteristics; Artificial intelligence technologies such as fuzzy logic, expert systems, and neural networks; Elevator group control system using computer.
Most of the domestic elevators are now all-in-one machines, all of which are concentrated together, and the domestic ones are simple, debugging, changing functions, and fault inquiries are simple, and the maintenance cost is low in the later stage.
Optimization design based on elevator electrical What are the main contents of this topic and the key problems to be solved?
Elevator control system optimization design PLC (programmable controller) as an industrial control microcomputer, with the continuous development of society, the building is getting higher and higher, and the elevator has become a necessary equipment for high-rise buildings. Because PLC has the functions of logical operation, counting and timing, as well as data input and output. In the process of elevator lifting, various logic control and PLC are well combined, and the control of the elevator is well realized.
This paper mainly discusses the use of FX2N PLC to control the lifting and lowering of elevators. The elevator control system was designed with the seven-story elevator as the control object and the PLC as the tool. During the design process, the hardware part of the seven-story elevator was analyzed to see what kind of switches, motors, contactors, signal lights, etc. were needed.
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Anonymous users2024-02-03Summary. Hello dear, happy to answer for you. The control technology of the elevator refers to the electrical automatic control of the transmission system and the control system of the elevator.
In high-rise buildings, many elevators with good transmission and maneuvering performance have been designed and manufactured. Modern elevators mainly take high-rise buildings as the service object, in order to better meet the needs of high-rise buildings for elevators, elevator control technology has also experienced a development stage from simple to complex, from low to high. As the main symbol of the elevator in the 70s of the 20th century in China, the AC two-speed elevator is used to change the number of pole pairs of the elevator traction motor.
Hello dear, happy to answer for you. The control technology of the elevator refers to the electrical automatic control of the transmission system and the control system of the elevator. In high-rise buildings, many elevators with good transmission and maneuvering performance have been designed and manufactured.
Modern elevators mainly take high-rise buildings as the service object, in order to better meet the needs of high-rise buildings for elevators, elevator control technology has also experienced a development stage from simple to complex, from low to high. As the main symbol of the elevator in the 70s of the 20th century in China, the AC two-speed elevator is used to change the number of pole pairs of the elevator traction motor.
In view of the development status of the control method of classroom lighting, especially the development status of intelligent control of classroom lighting, this study analyzes the principle and implementation method of intelligent control of classroom lighting, puts forward the design idea of classroom lighting intelligent control system based on single-chip microcomputer, and develops the hardware device and corresponding software of intelligent control system on this basis. The system uses AT89C52 single-chip microcomputer as the intelligent component of the control device, uses pyrothermal infrared human body sensor to detect the existence of human body, and uses a circuit composed of photosensitive transistor to detect the intensity of ambient light. According to the conditions of reasonable lighting in the classroom, the system completes the intelligent control of the classroom lighting circuit through the recognition and intelligent judgment of the presence signal of the human body and the ambient light signal, and avoids a large waste of electricity in the classroom. The system also has a variety of alarm functions; At the same time, anti-interference measures such as software and hardware "watchdog" technology are also adopted. >>>More
In the automatic control switch circuit of street lights, KM usually refers to the relay. A relay is an electronically controlled switching device, which controls the switching state of the circuit through electromagnetic attachment and release. In the automatic control system of street lights, the relay plays the function of controlling the switch of the street lights. >>>More
People want circuit diagrams, and you're selling ads here.
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The elevator internal selection button (floor button) generally has four wires, two power lines, two signal lines, the card reader is just a switch, one of the signal lines of the button is disconnected, and the control signal line of the card reader is strung into the disconnected signal line. When someone swipes the card, it is equivalent to the button signal line is connected to realize the floor selection, and when no one swipes the card, the button signal line is disconnected and the floor cannot be selected.