JPH0270144A - Transmission system - Google Patents

Abstract

PURPOSE:To attain correspondence to the increase of address space and to shorten time by dividing a transmission line into plural systems, selecting them by means of bank switching and specifying a terminal. CONSTITUTION:Selection signals are given to semiconductor switches 35a and 35b by selection data of an output buffer 16a in a main station MS 21A. CPU 12 sets a leading address in RAM 13, gives and outputs it to SCU 31 and transmits it to transmission interfaces 21b and 21c through the switches 35a and 35b which are turned on. When address information are for output, data to be transmitted are transmitted to corresponding transmission lines 26 and 27. CPU 12 updates the addresses, gives them to the interfaces 21b and 21c are stores them in RAM 13 through CPU 12 for input. When the address is not the final one, it is updated and transmitted to the interfaces 21b and 21c and it is repeated until the address comes to the final one. Thus, correspondence is attained to the increase of the terminals by the increase of the number of banks and the system is economical. Since the addresses are only updated in a prescribed range, information can be transmitted and given at a high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a transmission system used for transmitting elevator signals, for example.

(Prior Art) In recent years, elevator systems have come to use small computers such as microcomputers in their control systems, and as a result of implementing control using software, complex control has become possible.

In addition, the elevator equipment includes lanterns, hall call registration buttons, chimes, call registration lights (the above are for the landing), floor buttons, door open/close buttons, direction lights, etc. (the above are for the inside of the car) in the hall (landing) and the car of each floor ), and these have come to be controlled by small computer control units on a per hall and per car basis.

Therefore, it is essential to transmit information between computers, and as control contents become more complex and sophisticated, the amount of information to be transmitted continues to increase, and high-speed communication is required.

Therefore, in recent years, the elevator control device that controls the elevator has been designated as the main station, and the control units of the hall equipment and car equipment have been designated as remote stations, and these have been connected via a network, allowing communication between the main station and each remote station. Various types of control have come to be performed by exchanging data.

An outline of this type of conventional elevator control using a computer will be explained with reference to FIGS. 7 to 11.

FIG. 7 is a block diagram showing the overall configuration of a conventional system. In the figure, reference numeral 21 is an elevator control device installed in the elevator machine room, which is composed of a small computer and is a main station (MS) of a network in information communication. ) is formed. Further, 22 to 25 are control units for equipment provided on each floor and in the car, which are also constructed from small computers, and form a remote station (R5) in the network. These remote stations 22 to 25 and Imen Station 2
1 is connected by a signal line 26, which is a serial line, and information is exchanged between them by serial transmission.

FIG. 8 is a block diagram of the main station 21 and remote stations 22 to 25, and shows a central processing unit (CPU) 12 that executes programs.
, random access memory (RAM) that stores data
13. Read-only memory for storing programs (
ROM) 14, input buffer 1 for inputting signals from outside
5. An output buffer 716 that outputs signals to the outside, a serial communication unit (SCU) 31 that serially transmits information to the outside, and a line driver 33 and a line receiver 3 that interface their input and output to the transmission path 26.
4. Consists of a timer 32 that generates a clock signal CLK that determines the transmission speed.

A transmission method according to the prior art in such a configuration will be described below.

The transmission method in this prior art is a cyclic scan method, and the main station (MS) 21 shown in FIG. 7 has control over the transmission.

The transmission method will be explained below with reference to FIGS. 9 to 11. In order to simplify the explanation, an example will be described in which there is one main station (MS) 21 and three remote stations, RSI, R32, and RS3.

First, FIG. 9 shows a map of addresses.

The main station (MS) 21 secures six addresses, three of these six addresses are used for output data (DIO to D12), and the remaining three are used for input data (D13 to D15). one for each remote station. For example, the output address AIO is the data DIO output by the main station (MS) 21 and the remote station (RS
I) is the address to be input. On the other hand, input address A13 sends data D13 to the remote station (RSI).
) is the address output by the main station (MS) and input by the main station (MS). In this way, for addresses AIO to A15, the stations that output and input data are determined.

Next, the actual transmission procedure and data input/output timing at each station will be explained with reference to FIG.

First, at time Tl, the main station (M
S) outputs address data (A10) to the transmission line 26. Each remote station R3I.

R82 and R33 each input this address data (A10) and check whether it is an address assigned to itself or not. If the address is assigned to itself, it immediately checks whether the address is for output or manual use. is determined, and data is input/output to the transmission line 26 at time T2.

In other words, the remote station (R5I) that has input address data (AIO) is assigned an address and is for input, so it waits for the next data (DO). On the other hand, the main station (M) that outputs the address data (AIO)
Immediately thereafter, S) checks whether it is for output or for manual input, and inputs and outputs the data. Since the address (A to) is for output, the main station (MS) outputs the data (D 10) stored there to the transmission line 26 at time 12.

When such processing is performed continuously up to address (A15), data input/output with each remote station is completed. In other words, the data arrangement of the transmission line 26 viewed on the time axis is as shown in FIG.

The update time T of these six data is T-T, 10"r2+...+T, 2+T, X
12 Here, T: processing time.

(Problem to be solved by the invention) In this way, the elevator control device that plays the central role in elevator control is considered the main station, and the control device for each landing and car, which is responsible for controlling the equipment in each landing and car, is used as the remote station. In a system in which elevator operation is controlled by sending and receiving control information by connecting these devices with communication lines, there are many devices to be controlled on the remote station side, and these may be switches, etc. It could be a lamp, a chime, or a motor for controlling a door. These controls are executed by sending and receiving control information through communication transmission.

However, such a system may not be usable depending on the number of devices to be controlled. In other words, the number of addresses is finite, and input/output points can only be set for the number of possible addresses, so this number of addresses limits the number of devices. For example, if we consider the case where the address frame is composed of 4 bits, there will be 16 address spaces with 4 bits, but if this is converted to the number of remote stations at the hall, it will be the required address per hit. Therefore, if a remote station is installed at each landing on each floor, it can only be used up to the 8th floor. Moreover, this does not include the remote station installed in the car. In such cases, measures such as expanding the number of bits that make up the address frame or using multiple address frames can be taken.
In the former case, a higher-order microprocessor (CPU) such as 8-bit, 12-bit, or 16-bit is used, which means changing the CPU, resulting in a major system change in both hardware and software.

Furthermore, the use of a high-performance CPU results in a significant increase in cost. In addition, the latter can be handled by changing the program without changing the hardware configuration, but since the update time for each address part increases, the system update time increases significantly, and it cannot be used when high-speed response is required. There will be no. Therefore, there is a need for the development of a technology that can avoid major changes in systems, etc., suppress cost increases, and control a large number of devices at high speed.

Therefore, the object of this invention is to provide a transmission system for elevator signal transmission that can cope with the increase in address space at the main station without using the above-mentioned CPU and can minimize information update time. Our goal is to provide the following.

[Configuration of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows. In other words, multiple terminals are connected to the main side via a transmission path, the main side and each terminal are identified by different addresses, and the input and output addresses are different, and the main side sequentially updates these addresses and outputs. death,
When this address is an output address, information is sent; when it is a reception address, information on the transmission path is received; on each terminal side, when the address on the transmission path is for itself and the address is for reception, information is sent on the transmission path. In a transmission system that exchanges information by receiving information and sending its own output information on the transmission path if it is for transmission, if the number of possible addresses is insufficient, the number of addresses available to the terminal is Assign addresses, divide the terminals into multiple systems using these as one system, connect each system to a different transmission path, and provide selection means for selecting these transmission paths on the main side, as well as address update and switching control of this selection means. The system is configured by providing a control means for selecting each terminal according to the system and exchanging information with the selected terminal.

(Function) This system divides the transmission line into multiple systems, selects them by switching banks, identifies terminals connected to that system in each bank, and sends and receives information. ing. In other words, this system connects multiple terminals to the main side via a transmission path, identifies the main side and each terminal side with different addresses, and sets different addresses for input and output, and updates these addresses sequentially on the main side. When this address is an output address, it sends information, and when it is a reception address, it receives information on the transmission path, and on each terminal side, when the address is addressed to itself and the address is for reception, it sends information on the transmission path. Information is exchanged by receiving information and transmitting the information to be output on the transmission path if it is for transmission, but if the number of possible addresses is insufficient in the system, the range of possible addresses can be changed. addresses are assigned to the terminals, these are considered as one system, the terminals are divided into multiple systems, and each system is connected to a different transmission path, and the main side is provided with a selection means for selecting these transmission paths, and the address update and this Each terminal is selected according to the system by controlling the switching of the selection means, and information is exchanged with the selected terminal.

Therefore, by increasing the number of banks, it is possible to cope with the increase in the number of terminals, and since there is no need to change the CPU to a higher-level one, it is possible to suppress cost increases, and the system can be switched by switching banks. Moreover, since the address is only updated within a predetermined range, information can be exchanged at high speed.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

Incidentally, since the basic configuration of the present invention is the same as that already explained as the prior art, the same elements are given the same reference numerals and the explanation will be omitted.

FIG. 1 is a block diagram showing the overall configuration of the apparatus of the present invention, and 21A is a main station.

As shown in the figure, this main station 21A includes a transmission control processing section 21a composed of a small computer, this transmission control processing section 21. A semiconductor switch 35a, which will be described later, is controlled by a signal from a.

Output buffer 1 outputting on/off control information of 35b
6a1 A transmission interface section 21b consisting of a driver for transmission and a receiver for reception.

21C1 consists of semiconductor switches 35a and 35b that are turned on and off by the output of the output buffer 716a and selectively connect the 5CU 31 of the transmission control processing section 21a and either one of these transmission interface sections 21b and 21c, and the transmission path 26 and 27 are the remote stations 22 to 25 and the main station 21A for the landing and cars, respectively.
and configure a network. Incidentally, FIG. 2 shows a block diagram of the main station 21A.

Next, the operation of the transmission method in this system having the above configuration will be explained with reference to FIGS. 3 to 6. Since this is basically the same as the prior art described above, the differences will be mainly explained.

FIG. 3 shows the memory map (address map) in this system. As shown in FIG. 3, the main station (MS) 21A is for controlling hall equipment (memory map Ml
) and one for car side equipment control (memory map M2). However, remote station (R
S) The addresses assigned to 22 to 25 are the same in both types of memory maps, and are respectively AIO to A15.

The address shown in the memory map is the address assigned to the remote station, and the address shown in the memory map is the address assigned to the remote station.
This address is different from the address used when MS) stores it in its own RAM 13 as control data.

When storing in the RAM, an index or the like is used to distinguish between those for hall equipment control and those for car equipment control.

Before starting transmission, the main station (MS) 21A outputs a transmission line selection signal according to the index described above, and then selects one of the transmission lines 26 and 27 using semiconductor switches 35a and 35b. After that, transmission begins. When the transmission between the selected transmission path and the remote station is completed, the main station 21A
By updating the index data, the transmission path selection signal changes, and transmission is performed between remote stations connected to other transmission paths.

Serial communication unit (S) seen on the time axis
The data arrangement of the CU section 31 is shown in FIG.

The update time T for these 12 pieces of data is T-(T, +T2+...+TI2+T, X
12) + (T,, +T2m+... +T, □, +T, x12) +Ta (where T is the transmission switching time and T1 is the interval time between adjacent data).

Figure 5 shows the processing flowchart of the main station (MS) explained above.
A processing flowchart is shown in FIG.

That is, when the main station intends to perform transmission, it sets selection data in the output buffer 16a to use the appropriate one of the two transmission paths 26 and 27 according to the index described above. do. As a result, the output buffer 16a holds this selection data and supplies it as a selection signal to the semiconductor switchers 35a and 35b, so that one of the semiconductor switches 35a and 35b is turned on and the other is turned off. This is Sll processing.

Next, the main station CPU sets the start address to R.
It is set on the counter set to AM13 upper, etc., and is given to the 5CU31 and output (S12°S13). As a result, the SCU 31 sends this address to the transmission interface connected to it through the semiconductor switch that is turned on, and the transmission interface that receives this determines whether it is for output based on this address information, If it is an output address, then the CPU 12 outputs the data sent through the 5CU 31 to the transmission path corresponding to the transmission interface (SL4.515). The CPU 12 updates the address while switching the semiconductor switches 35a and 35b separately from the index and gives it to the transmission interface (S16.517
), the transmission interface that is turned on determines whether it is for output or input according to the address, and if it is for input, sends the data to the CPU 12 via the 5CU 31 (
S14. S18) The CPU 2 stores this input data in the RAMI 3, checks the address, and updates the address if it is not the final address.
517), and sends this updated address to the transmission interface (S13). In this way, address updating and data transfer are repeated until the final address is reached, and once the final address is reached, execution is restarted from Stt.

As shown in Figure 6, the remote station side receives address information from the transmission path (S21) and judges whether or not its own assignment is an address (522), and if its own assignment is an address, this is the address. It is determined whether it is for output (S23). Then, if it is for output, it sends out the data to be sent to the transmission path (524), and if it is not for output, it takes in the data from the transmission path (S25). Repeat this operation.

In this way, this system connects multiple terminals to the main side through transmission lines, identifies the main side and each terminal side with different addresses, and sets different addresses for input and output, and updates these addresses sequentially on the main side. When this address is an output address, it sends information, and when it is a reception address, it receives information on the transmission path, and on each terminal side, when the address on the transmission path is addressed to itself, it transmits information even if the address is for reception. In a transmission system that exchanges information by receiving information on a transmission path, for example, and transmitting its own output information on the transmission path if it is for transmission, the number of possible addresses is limited when the number of possible addresses is insufficient. Assign addresses to terminals within the range, divide the terminals into multiple systems and connect them to different transmission lines for each system, provide a selection means for selecting these transmission lines on the main side, and update the address one by one. The system is constructed by providing a control means that performs switching control of the selection means each time the system is used, and exchanges information with each terminal for each system.The transmission path is divided into multiple systems, which are selected by bank switching, and each In this system, terminals connected to the network are identified in bank units, and information is exchanged.

Therefore, by increasing the number of banks, it is possible to cope with an increase in the number of terminals, and since there is no need to change the CPU to a higher-level one, it is possible to suppress cost increases, and the system can be switched by switching banks. Moreover, since the address is only updated within a predetermined range, information can be exchanged at high speed.

As a result, the main station alone can handle the increase in the number of remote stations that are subject to transmission, making it possible to provide a low-cost, high-performance elevator signal transmission system that minimizes information update time. .

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but can of course be implemented with appropriate modifications within the scope of the gist; for example, in the above embodiment, the transmission path is Although we have only explained the system, by adding semiconductor switches and transmission interfaces and connecting transmission lines independently, it is possible to have three or more transmission lines, which makes it easy to accommodate an increase in the number of remote stations. It is possible. Furthermore, the selection of transmission paths can be easily handled by index control even when it is not necessary to select each transmission path in sequence.

[Effects of the Invention] As detailed above, according to the present invention, by increasing the number of banks, it is possible to cope with an increase in the number of terminals, and there is no need to upgrade the CPU to a higher-level one, thereby suppressing cost increases. In addition, it is possible to switch systems by switching banks, and since addresses are only updated within a predetermined range, it is possible to provide a transmission system with features such as the ability to send and receive information at high speed. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the overall system configuration of the present invention, FIG. 2 is a block diagram showing the configuration of the main station in FIG. 1, and FIGS. 3 and 4 are examples of the embodiment shown in FIG. 1. Figure TS5 is a flowchart of the main station transmission process of the embodiment shown in Figure 1, and Figure 6 is a flowchart of the remote station transmission process of the embodiment shown in Figure 1. 7 to 11 are diagrams showing the prior art, in which FIG. 7 is a transmission system configuration diagram, FIG. 8 is a block diagram of the main station and remote station shown in FIG. 7, and FIG. 9 to 1
FIG. 1 is a diagram for explaining data transmission according to the prior art. 21A...Main station, 22-25...Remote station, 26.27...Transmission line, 16a
...Output buffer 7.35a, 35b...Semiconductor switch, 21b, 21c...Transmission interface section.

Claims (1)

[Claims] Connect multiple terminals to the main side via a transmission path, identify the main side and each terminal side with different addresses, and set different addresses for input and output, and the main side sequentially updates and outputs these addresses. When this address is an output address, information is sent; when it is a reception address, information on the transmission path is received; on each terminal side, when the address on the transmission path is for itself and the address is for reception, information is sent on the transmission path. In a transmission system that exchanges information by receiving information and sending its own output information on the transmission path if it is for transmission, if the number of possible addresses is insufficient, the number of addresses available to the terminal is Assign addresses, divide the terminals into multiple systems using these as one system, connect each system to a different transmission path, and provide selection means for selecting these transmission paths on the main side, as well as address update and switching control of this selection means. 1. A transmission system comprising a control means for selecting each terminal according to the system and exchanging information with the selected terminal.