JP2005067879A - Elevator transmission control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator transmission control device capable of changing the transmission speed of serial signals between a main transmission control device and an auxiliary transmission control device. <P>SOLUTION: In this elevator transmission control device, when a transmission baud rate is changed, the main transmission control device transmits transmission baud rate change data through the memory area of a specified address 3FFh. When the control device receives transmission baud rate change permission signals from all platform transmission control devices, the main transmission control device transmits transfer baud rate change instruction signals through the memory area of the specified address 3FFh. The platform transmission control devices receive the transfer baud rate change data and the transfer baud rate change instruction signals through the memory area of the specified address 3FFh. After transmitting and receiving the transfer baud rate change instruction signals, the platform transmission control devices are operated by a changed transmission baud rate. By this, the transmission speed of the serial signals between the main transmission control device and the auxiliary transmission control device can be changed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an elevator transmission control device.

  In the elevator control system, data is transmitted and received between the main control device and a landing display control device, a car display control device, a door control device, and the like.

  A control system for a landing display will be described as an example with reference to FIG. As shown in the figure, in the elevator transmission control device in this case, the main transmission control device 10 installed in the main control device and the landing transmission control as a sub-transmission control device installed in the landing display control device. Data is transmitted to and received from the device 11.

  Control of position information, operation button input information, or operation button registration information of the landing transmission control device 11 is determined by the CPU 14 determining data transmitted to the RAM 19 of the main transmission control device 10 and transmitting the data. Information exchange between the main transmission control device 10 and each landing transmission control device 11 is generally performed by serial data via a transmission driver 16 which is a standard serial transmission device. This standard serial transmission control device is a long-distance balanced serial transmission such as RS-422 and RS-485, and is a differential input type, and is excellent in noise resistance. The main transmission control device 10 and each landing transmission control device 11 are connected to the two transmission lines 17, and each landing transmission control device 11 receives the serialized address transmitted from the main transmission control device 10 and assigns it. Determine whether the address is correct. Only the control device at the landing where the addresses coincide with each other determines from the address whether the transmitted address is to transmit the operation button signal to the main transmission control device 10 or to receive the position display data continuously. These series of controls are processed by the CPU 14 in the hall transmission control device 11.

  FIG. 8 is a control processing flowchart of the main transmission control device 10 and the landing transmission control device 11. As shown in the figure, in the main transmission control device 10 and the landing transmission control device 11, transmission baud rate register setting is performed as an initialization process (31f), and data transmission / reception is started at the set transmission baud rate. When data is received (32f), if it is an address, the address is determined (33f), and in the case of input control, data is received (34f), the input data is stocked (35f), Application processing is performed (36f). Also, the address is determined (33f), and in the case of output control, data is transmitted (37f).

  On the other hand, the transmission path 17 for transmitting and receiving transmission data uses a twisted pair wire, a shielded wire, or a coaxial cable. The main transmission control device 10 on the transmission line 17 and the landing transmission control device 11 farthest from the main transmission control device 10 have a resistance of 50 to 100Ω in order to take impedance matching between the transmission line and the reception line of the transmission line 17. Install.

Next, a data structure of data transmitted / received by a serial signal will be described with reference to FIG. In the elevator system, data transmission / reception with a control device installed in the landing, car, etc. is performed by cyclic scanning, so the total amount of data handled is about 1 Kbyte. As shown in the figure, this data has a data structure of start bit 23, address data 25, parity bit 27, CRC check 24, stop bit 28 in start-stop synchronization, and an address / data cycle 22 as shown in the figure. The address and data are transmitted repeatedly. In the figure, the address L and the address H are transmitted from the main transmission control device 10 in one address / data cycle 22, and then the data L and the data H are transmitted.
The case where the data L and the data H are transmitted after the address transmission control device 11 receives the address L and the address H is illustrated.

  The main transmission control device 10 that transmits data and the landing transmission control device 11 that receives data communicate data at a constant data transfer rate. This data transfer rate is handled as a baud rate, and data transfer is generally performed at a speed of about 9600 bps to 1.5 Mbps in the elevator control system. Data communication is performed at a uniform baud rate, such as the main transmission control device and the landing transmission control device.

  The baud rate of 1.5 Mbps, which is the fastest transmission baud rate, will be described as an example. In the case of data transmission, data is transmitted at a speed of 8 μs (30 in FIG. 9) at 660 ns per bit (29 in FIG. 9). Send and receive.

  Even if the model of the elevator system is changed, the unified baud rate in each transmission control device does not change. This is because even if a model change occurs, there are few cases where all devices change, and transmission control devices that are optionally used are generally used across series. This is because if the baud rate is changed, there is no compatibility and a new system needs to be constructed.

  However, in the following cases, it is important to respond by changing the baud rate.

  The first point is to improve the processing capability of the transmission control CPU with the addition of functions of the transmission control device. In this case, the transmission baud rate is increased to improve the processing speed of the transmission control device.

  Second, the transmission baud rate itself is lowered to increase the number of serial signal samplings, thereby reducing the error rate at the time of data reception and improving the transmission quality.

  The change of the baud rate of the above two transmission systems is based on the premise that the transmission baud rate of each transmission control device in the transmission system is unified to the required transmission system. The transmission baud rate is fixed in each transmission control device. When operating, there arises a problem that the two transmission system requirements cannot be met.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an elevator transmission control device that can change the transfer rate of a serial signal between a main transmission control device and a sub-control device.

  An elevator transmission control device according to the present invention includes a main transmission control device installed in an elevator, and at least one sub-transmission control device that is connected to the main transmission control device via a transmission line and transmits / receives data using a serial signal, The serial signal transfer rate between the main transmission control device and the sub-transmission control device can be changed by data from the main transmission control device.

  According to the present invention, it is possible to select a transfer rate optimized by the operation of the elevator, and the effect of improving the reliability of the transmission system and shortening the processing time can be obtained.

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

  FIG. 1 shows the configuration of an elevator transmission control device according to an embodiment of the present invention. This embodiment is an embodiment in which the present invention is applied to a landing display control device and the sub-transmission control device is a landing transmission control device.

  As shown in FIG. 1, the main transmission control device installed in the elevator main control device stores a clock 2 that determines an operating frequency with the transmission control CPU 1 as the center, and data to be transmitted and received between each landing transmission control device. A RAM 4 is provided.

  The RAM 4 is a common RAM with the main CPU that controls the operation of the elevator, and the main CPU and the transmission control CPU 1 can share data with the RAM 4. A standard transmission driver 3 is connected to the transmission control CPU 1 as in the case of the above-described conventional example.

  On the other hand, the landing transmission control device installed in each landing is installed in the operation button device in the landing display device. The circuit configuration of this landing transmission control device is centered on the transmission control CPU 1 and is connected to a clock 2 that determines the operating frequency of the CPU 1 and a nonvolatile memory ROM 8 that stores control data of the CPU 1.

  The ROM 8 includes a ROM controlled by an address bus depending on a data size and a serial ROM controlled by serial data from a port. A serial ROM is generally used if the amount of data is limited as in the storage data in this embodiment.

  The transmission line 7 connecting the main transmission control device and each landing transmission control device is a balanced transmission line, and is composed of two transmission lines of a transceiver / receiver. The transmission line is a twisted pair cable, shielded cable, or coaxial. Use cables.

  The software configuration of the transmission baud rate setting process of the CPU 1 of the main transmission control device and the landing transmission control device will be described.

  In the CPU 1 of the main transmission control device, an option discrimination processing unit 1a that discriminates an option from data from the RAM 4, a transmission baud rate data selection processing unit 1b that determines transmission baud rate data from this data, and the data selected by these are landing-transmitted A transmission address table 1c defining transmission address areas to be transmitted to the control device (or received from the landing transmission control device), a transmission baud rate change permission signal processing unit 1d for confirming permission to change the transmission baud rate from the landing transmission control device, The transmission baud rate change permission signal processing unit 1d is configured by software including a transmission baud rate register update processing unit 1e that updates the transmission baud rate register by a signal from the signal.

  In the CPU 1 of the landing transmission control device, the transmission address table 1c that defines the transmission address area that transmits (or receives from the main transmission control device) the data to be selected and the transmission that is transmitted to the main transmission control device. The transmission baud rate change permission signal processing unit 1d for generating the baud rate change permission signal and the software provided with the transmission baud rate register update processing unit 1e for updating the transmission baud rate register by the transmission baud rate change instruction signal from the main transmission control device are configured. .

Then, a specific address 3FFh in the transmission address table 1c of the main transmission control device and the landing transmission control device is used as a transmission baud rate change area, and when the transmission baud rate is set (when the transmission baud rate is changed) Transmission baud rate change data determined by the transmission baud rate data selection processing unit 1b and transmission / reception of a transmission baud rate change permission signal are performed.

  That is, when the transmission baud rate is set (when the transmission baud rate is changed), the transmission baud rate change data determined by the transmission baud rate data selection processing unit 1b in the CPU 1 of the main transmission control device is stored in the transmission baud rate change area of the address 3FFh (FIG. 1). (1) of the main transmission control device) and is sent to each landing transmission control device in the data of address 3FFh.

  The CPU 1 of each landing transmission control device stores the received transmission baud rate change data in the transmission baud rate change area at address 3FFh. When the transmission baud rate change permission signal processing unit 1d confirms this ((1) of the landing transmission control device in FIG. 1), a transmission baud rate change permission signal is generated and stored in the area of the landing button input (see FIG. 1). It is transmitted to the main transmission control device (2)) of the landing transmission control device.

  The transmission baud rate change permission signal received by the CPU 1 of the main transmission control device is stored in the area of the landing button input. When the transmission baud rate change permission signal processing unit 1d confirms the received transmission baud rate change permission signal ((2) of the main transmission control device in FIG. 1) and confirms reception from all landing transmission control devices, the transmission baud rate change The permission signal processing unit 1d generates a transmission baud rate change instruction signal, stores it in the transmission baud rate change area at the address 3FFh ((3) of the main transmission control device in FIG. 1), and puts it on the data at the address 3FFh for each landing The transmission baud rate register update processing is performed by the transmission baud rate register update processing unit 1e while being transmitted to the transmission control device.

  The CPU 1 of each landing transmission control device stores the received transmission baud rate change instruction signal in the transmission baud rate change area at address 3FFh, and the transmission baud rate register update processing unit 1e performs transmission baud rate register update processing (the landing in FIG. 1). (3) of the transmission control device.

  The operation of this embodiment will be described in more detail.

  FIG. 2 is a flowchart of control processing in the main transmission control apparatus.

  When the elevator controller is turned on and the system is started, after the reset of the main transmission controller is released, the initialization process at the time of software activation (1f) is performed within about 1 second from the start of the power supply at which the software starts to the start of software activation. ) In the setting of registers, memory, ports, etc. and operation check, the data written to the transmission baud rate register is generally divided by the CPU clock, and the data is written to the register and transmitted. Determine the baud rate. The baud rate for serial transmission used in the elevator system is about 9600 to 1.5 Mbps, and is determined based on necessary conditions in the system. When the transmission baud rate is set in the register and initialization is completed, data is initially input from the common RAM 4 that exchanges data with the main CPU that controls the elevator operation (2f).

This data includes information on display contents such as landing buttons, indicators, and direction lights, data transfer other than display contents, address setting operation dedicated to each landing, and resting operation. When the data transmission / reception area is about 1 Kbyte (3FFh), when the address area up to 3FEh is used for the landing and car control, the processing is usually returned to address 0h as the end of one cycle operation. When executing the setting process, 3FFh is used as the setting area.

  That is, in normal processing, after data is read from the common RAM 4 and operation update data is stored in the transmission address table 1c (2f), the address and data of the transmission area are sequentially transmitted, and when these data transmissions are completed (3f.about. 5f) The operation of transmitting the address of the receiving area, receiving the data and storing the data in the built-in RAM is sequentially performed. When this is completed (up to 3FEh) (6f-9f), the operation update data is written to the common RAM 4 ( 2f) Although one cycle operation is completed, when the transmission baud rate setting process is executed, the transmission baud rate setting process (10f) is performed using 3FFh as a setting area.

  Next, a transmission baud rate setting method will be described using FIG. 3 and FIG.

  FIG. 3 and FIG. 4 are transmission baud rate setting processing flowcharts of the main transmission control device and the landing transmission control device, respectively.

  The main transmission control device monitors the operation operation for the hall display device from the elevator operation state (11f). For example, there are display data update processing, address set mode processing, operation stop processing, etc., and when the operation mode (12f) is an operation of address operation assigned to each platform in the address set mode, to improve transmission reliability When the transmission baud rate is temporarily lowered during the address set mode processing, the transmission baud rate setting change processing is executed. In this example, when performing button control for each floor platform, an address is allocated to each floor platform control device, and when an operation for setting the address is executed, the transmission baud rate is changed from A (when the transmission baud rate is assumed to be A) to B (transmission). A pattern to be updated when the baud rate is assumed to be B) will be described.

  The transmission baud rate change data is loaded from the main transmission control device to the data at the specific address 3FFh (14f), and the data is transmitted all at once to the landing transmission control devices (13f to 15f).

  Each landing transmission control device receives the address 3FFh and data (22f, 23f), and stores the data as update data in the internal RAM (24f, 25f).

  Each landing transmission control device that has received the transmission baud rate change data adds the transmission baud rate change permission signal data (transmission baud rate change permission completion data) to the button input signal data area, and sends the transmission baud rate change permission signal to the main transmission control device. Data is transmitted (26f, 27f).

  In the main transmission control device, after transmission of the address 3FFh (14f) and data (15f), if transmission baud rate change permission signals are received from all the landings (16f to 18f, 20f), the address 3FFh (14f) is again transmitted. A transmission baud rate change instruction signal is transmitted on the data and the transmission baud rate setting register is updated (19f).

  If the transmission baud rate change permission signal data is not received from all the landing transmission control devices, the transmission baud rate is not changed, and the processing is continued at the transmission baud rate of the current operation (20f, 21f). This is because if the transmission baud rate is different even at one place, the transmission signal may interfere with the entire transmission system, and normal transmission may not be possible.

As described above, when all the transmission baud rate change permission signals from the landing transmission control devices have been confirmed, a transmission baud rate change instruction signal is transmitted from the main transmission control device to address 3FFh (14f) (19f). This is received by each landing transmission control device (28f, 29).
f), the transmission baud rate setting register is updated (30f), and the system starts to operate at the transmission baud rate changed from the address 0h of the next cycle.

  FIG. 5 shows the address and data structure when the transmission baud rate is changed. The transmission baud rate setting address area is 3FFh, D0 to D3 of the data structure are the transmission baud rate settings (set by the main transmission controller), and D7 is transmitted. Indicates a baud rate change permission completion flag (set by the landing transmission control device). As a method for setting the transmission baud rate, there are a method indicated by 0 and 1 with two types of changed baud rates, or a method of directly describing baud rate data.

  FIG. 6 is a schematic diagram for changing the transmission baud rate, and shows how the transmission baud rate A during normal operation is changed to the transmission baud rate B when the landing address set operation is executed.

  As described above, in this embodiment, the specific address 3FFh in the transmission address table 1c of the main transmission control device and the landing transmission control device is used as the transmission baud rate change area, and the memory of this specific address 3FFh is used when the transmission baud rate is changed. Transmission / reception of the transmission baud rate change data determined by the transmission baud rate data selection processing unit 1b and transmission / reception of the transmission baud rate change permission signal are performed via the area. Therefore, the software configuration for changing the transmission baud rate can be simplified, the memory area and software during normal operation are not required to be changed, and the data structure can be used as it is. It is also possible to carry out the invention with a slight modification to the elevator transmission control device.

  In addition, although the said embodiment is a thing at the time of applying this invention to a landing indicator control apparatus, this invention is not limited to this, For example, it applies also to a car indicator control apparatus, a door control apparatus, etc. Can be implemented.

The block diagram of the elevator transmission control apparatus which concerns on one Embodiment of this invention. The control processing flowchart figure of the main transmission control apparatus in one Embodiment of this invention. The transmission baud rate setting process flowchart figure of the main transmission control apparatus in one Embodiment of this invention. The hall | hole transmission control apparatus transmission baud rate setting process flowchart figure in one Embodiment of this invention. The address data structure figure at the time of transmission baud rate change in one embodiment of the present invention. The transmission baud rate change outline figure in one embodiment of the present invention. The block diagram of the conventional elevator transmission control apparatus. The control processing flowchart figure of the conventional main transmission control apparatus and subtransmission control apparatus. The figure for demonstrating the structure of the conventional transmission data.

Explanation of symbols

1. Transmission control CPU
DESCRIPTION OF SYMBOLS 1a ... Option discrimination | determination processing part 1b ... Transmission baud rate data selection processing part 1c ... Transmission address table 1d ... Transmission baud rate change permission signal processing part 1e Transmission baud rate register update processing part 2 ... Clock 3 ... Transmission driver 4 ... RAM
5 ... Address bus 6 ... Data bus 7 ... Transmission path 8 ... ROM

Claims (3)

  A main transmission control device installed in an elevator; and at least one sub-transmission control device connected to the main transmission control device via a transmission line and transmitting / receiving data using a serial signal, the main transmission control device and the sub-transmission control An elevator transmission control device characterized in that a transfer rate of a serial signal to and from the device can be changed by data from the main transmission control device.   When the main transmission control device transmits data for changing the transfer rate to the sub-transmission control device and receives a signal permitting the change of transfer rate from all the sub-transmission control devices, the sub-transmission control device The elevator transmission control device according to claim 1, wherein the transmission speed is changed after transmitting a signal instructing the change of the transfer speed. The main transmission control device and the sub-transmission control device are provided with a memory area having a specific address for storing data for changing the transfer rate and a signal for instructing the change of the transfer rate. The elevator transmission control device according to claim 2, wherein data for changing the transfer rate and a signal instructing the change of the transfer rate are transmitted or received via the memory area.

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