KR100468091B1 - Elevator controlling system using a can communication mode and the can communication method - Google Patents

Abstract

The present invention relates to an elevator control system using a CAN communication method and a CAN communication method for performing data transmission / reception processes generated between a hall processor provided in an elevator, an elevator car processor, and a main processor controlling the elevator as a whole. It is about.

An elevator control system using such a CAN communication method includes a main processor that manages the overall control operation of the elevator system, an RM CPU board providing a CAN communication method, guides data transmission between the main processor and the RM CPU board, and provides an elevator car and a hall. The control board is provided with a DPRAM for setting the number of connections, and the data transmission is performed by the CAN communication method by the CAN'0 'level and the CAN'1' level of the RM CPU board. Is achieved by consisting of a cage CPU board and a hall CPU board to be set; As a result, it is possible to perform the processing time faster when an emergency event occurs, so that more hall CPU boards can be mounted, so that it can be applied to a high-rise building, and stable data communication can be performed because it is strong against noise.

Description

Elevator control system using the CAN communication method and its CAN communication method {ELEVATOR CONTROLLING SYSTEM USING A CAN COMMUNICATION MODE AND THE CAN COMMUNICATION METHOD}

The present invention relates to an elevator control system using a CAN (CONTROLLER AREA NETWORK) communication method and a CAN communication method thereof, and more particularly, between a hall processor and an elevator car processor of an elevator and a main processor that controls the elevator as a whole. The present invention relates to an elevator control system using a CAN communication method and a CAN communication method thereof, wherein the generated data transmission and reception process is performed by a CAN communication method.

In order to transmit information on each elevator level, that is, a response signal such as a response to a call signal generated at a platform of each floor of a building, and signals for indicating the driving position of the car on an indicator installed inside the car, In this case, as many transmission lines as necessary were installed and operated on each floor in the machine room of the elevator. However, in such a case, the interface between the control devices was increased in response to the high-rise building and the customer's high functional demand for elevator control and display methods. Many problems have arisen in standardization, installation and repair work.

In order to solve these problems, researches for reducing the number of installation wiring and interfacing with various devices have been continuously conducted, and as part of this, an elevator control panel, a plurality of platform control devices, an elevator control panel and a plurality of car control devices are commonly used. A method of connecting a signal and transmitting a signal between them using a microprocessor through a serial transmission method has been proposed.

However, in the case of using the serial transmission method as described above, the number of wires to be installed is reduced and flexibility in the external device interface, but in the conventional serial communication method applied to an elevator, the master sequentially polls the slaves. This is a master-slave type of RS-485 communication method that reads or writes data, which has a problem that the response time may be slow when an event requires urgent processing, and a separate circuit configuration for data collision is required. There is a problem in that it is weak to noise.

Accordingly, the present invention has been made to solve the above problems by performing a data transmission and reception process generated between the hall processor provided to the elevator and the elevator car processor and the main processor that controls the elevator as a whole, by the CAN communication method, It is an object of the present invention to provide an elevator control system and a CAN communication method using a CAN communication method to perform the processing time faster when an emergency event occurs.

Elevator control system using the CAN communication method of the present invention for achieving the above object, the main processor for managing the overall control operation of the elevator system, RM CPU board providing CAN communication method, the main processor and the RM CPU board The control board is equipped with a DPRAM for guiding data transmission of the elevator car and setting the number of hall connections, and the data transmission is performed by the CAN communication method based on the CAN'0 'level and the CAN'1' level of the RM CPU board. And a cage CPU board and a hall CPU board in which a maximum number of connections is set in a specific area of the DPRAM.

Preferably, the RM CPU board is provided with a DC / DC converter and a photo coupler for insulation from the motor control board.

In addition, the CAN communication method of the elevator control system using the CAN communication method of the present invention, while the RM CPU board providing the CAN communication method is processing data generated between the cage CPU board and the hall CPU board by the polling method. When an event occurs according to data input from an elevator car or hall, determining a bus access priority of the cage CPU board or the hall CPU board, and a cage generating zero level of the identifier according to the bus access priority from the determination process. If the CPU board is present, the data processing is prioritized over the signal generated from the Hall CPU board that generated the first level, while the Hall CPU board that generated the first level stops the data transmission for a predetermined time before the transfer bus is valid. When the data transfer is performed.

1 is a block diagram showing an elevator control system using a CAN communication method according to an embodiment of the present invention,

2 is a flowchart illustrating a CAN communication method of an elevator control system using a CAN communication method according to an exemplary embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100: control board, 102: main processor,

104: RM CPU board, 106: DPRAM,

108: cage CPU board, 110: hole CPU board.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an elevator control system using a CAN communication method according to a preferred embodiment of the present invention.

As shown therein, the overall control operation of the elevator system is performed by the main processor 102, the RM CPU board 104 providing CAN communication, and data between the main processor 102 and the RM CPU board 104. The control board 100 is provided with a DPRAM 106 for guiding the transmission and setting the number of connection of the elevator car and the hall. The RM CPU board 104 has a communication ID assigned to a address up to '0H-FH'. It communicates with up to 16 cage CPU boards 108 using the CAN'0 'level in the state, and uses the CAN'1' level with communication IDs assigned to the addresses up to '00H-FFH'. It is configured to communicate with up to 256 hole CPU boards 110.

Here, the cage CPU board 108 is provided with Philips 82C250 or 82C251 having a communication speed of 1MBPS, the maximum number of connection load of 110, and an operating temperature of -40 degrees to +125 degrees.

In addition, the Hall CPU board 110 is applied to the MCP2510 model having a CAN communication speed of 1Mb / s, SPI communication interface of 5M bps, an operating voltage of 3V ~ 5.5V and an operating current of 5mA.

In addition, the RM CPU board 104 may be provided with a DC / DC converter 130 and a photo coupler 140 to insulate the motor control board 120. The DC / DC converter 130 should be able to protect from overheating and short, and exhibits a breakdown voltage of 1 kVrms and a switching frequency of 800 kHz.

The operation of the present invention configured as described above will be described with reference to FIGS. 1 and 2.

First, the RM CPU board 104 performs data processing by the cage CPU board 108 and the hole CPU board 110 by a polling method. First, the RM CPU board 104 and the cage CPU board 108 are processed. Referring to the data communication between the cage CPU board 108 when the output data is generated, the cage CPU board 108 responds with the input data, the output and input data type can be represented as shown in the following [Table 1] .

TABLE 1

division Output data type Input data type Size in bytes 0 General purpose LED output General Button Input 8 One Disabled LED Output Handicapped Button Input 8 2 OC & DOC output INP & DOCS input Output (5), input (3)

That is, when the RM CPU board 104 sends output data to the cage CPU board 108 at regular intervals, the cage CPU board 108 responds with the input data for this, and can register the CPU board. . However, if no input data is generated from the cage CPU board 108 receiving the output data, the main processor 102 recognizes an error state and sends the output data to the next cage CPU board 108. The state of the cage CPU board 108 connected to the RM CPU board 104 is determined by this polling method.

Secondly, even when the RM CPU board 104 performs data communication with the hall CPU board 110, data communication is performed by the same method as the cage CPU board 108 described above.

In this case, the output and input data types between the RM CPU board 104 and the hall CPU board 110 may be represented as shown in Table 2 below.

TABLE 2

division Output data type Input data type Size in bytes One Button, Lanter, Chime Output Hall Button Input Output (2), input (1)

Of course, in addition to checking for mutual abnormality by the sequential polling method as described above, when the auto scan function is set, the main processor may scan the entire address and determine the state of the CPU board according to the response.

On the other hand, as described above, the RM CPU board 104 from the cage CPU board 108 or the hall CPU board 110 during data communication with the cage CPU board 108 and the hall CPU board 110 by the polling method. When an event occurs (step 202), the RM CPU board 104 preferentially determines the bus access priority by the identifier for the signal generated via the transmission bus (step 204).

According to the bus access priority determination, data transmission is first performed on a signal having a high priority (steps 206 and 208), and a low priority signal is transmitted to a valid state of a transmission bus after the data transmission is completed. As a result, a signal for low priority is transmitted (steps 210 to 214).

For example, when a data access signal occurs simultaneously through the CAN '0' level and the CAN '1' level, the lower the number of the identifier, the higher the priority. Signals generated at the 1 'level are processed sequentially.

As described above, according to the present invention, the data transmission / reception process generated between the hall processor provided in the elevator and the elevator car processor and the main processor which controls the elevator as a whole is executed by the CAN communication method, so that an emergency event occurs. As the processing time can be performed faster, more hall CPU boards can be mounted, and thus, the present invention can be applied to high-rise buildings, and it is resistant to noise, thereby making it possible to perform stable data communication.

Claims (3)

Main processor for managing the overall control operation of the elevator system, RM CPU board providing CAN communication method, A control board for guiding data transfer between the main processor and the RM CPU board and having a DPRAM for setting the number of connection of elevator cars and halls; The data transmission is performed by the CAN communication method by the CAN'0 'level and the CAN'1' level of the RM CPU board, and consists of a cage CPU board and a hall CPU board where the maximum number of connections is set in a specific area of the DPRAM. Elevator control system using the CAN communication method. The method of claim 1, The RM CPU board is an elevator control system using a CAN communication method, characterized in that the DC / DC converter and a photo coupler is further provided for isolation from the motor control board. When the RM CPU board that provides the CAN communication method processes the data generated between the cage CPU board and the hall CPU board by the polling method, an event according to data input from the elevator car or the hall occurs. Or determining the bus access priority of the Hall CPU board; In the case where there is a cage CPU board generating the zero level of the identifier according to the bus access priority from the determination process, the data is processed preferentially over the signal generated from the hall CPU board generating the one level, and the first level is generated. The hall CPU board is a CAN communication method of an elevator control system using a CAN communication method, characterized in that the data transfer process is performed when the transmission bus is valid after stopping data transmission for a predetermined time.