JPS61194943A - Signal transmitter for elevator - Google Patents

Abstract

PURPOSE:To reduce the number of signal lines by connecting a main station comprising small-sized computers installed in a machine room and a remote station comprising small-sized computer provided in each floor or a cage with a couple of signal line respectively and adopting the signal transmission as the series transmission by the bus system. CONSTITUTION:When the main station MS outputs address data A10 to a trans mission line 26 at a time T1, the remote stations RS1-RS3 input it respectively and check whether the address is the own assigned address or not and when the said address is an address assigned to the own station, then whether the address is used for output or input is discriminated and the data is inputted/ outputted to the transmission line 26 at a time T2. That is, the remote station RS1 inputting the address data A10 awaits the next data D0, because the address is the own assigned address and used for input. Then the main station MS sending the address data A10 checks immediately whether the data is used for output or input and inputs/outputs the data. Then the main station MS outputs the data D10 stored in it to the transmission line 26 at a time T2 be cause the data is used for output. The processings above are executed continu ously until the address A 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Description of Technical Field] The present invention relates to a signal transmission device for an elevator.

[Technical background of the invention and its problems]

In recent years, with the remarkable progress in semiconductor technology, microcomputers have improved in performance, become smaller and cheaper, and are now being used in most elevator control devices. However, microcomputers used in elevator control devices require a large number of input/output lines. In other words, an elevator control device consists of hundreds of devices such as position display devices, hall call registration devices, lantern chimes, etc. installed on each floor, car call registration devices, position display devices, operation mode switches, etc. installed on each car. This is to control many signals.

FIG. 9 (= shows signal transmission of an elevator control device according to the prior art. 11 is a block diagram of a microcomputer used in the elevator control device (: a central processing unit (CPU) that executes a program) 1
2, and random access memory (RA) that stores data.
M) 13, a read-only memory (ROM) 14 for storing programs, an input buffer 15 for inputting signals from the outside, and an output buffer 16 for outputting signals to the outside.

Further, signal transmission is parallel transmission, and one hall call button signal 17 and one car call button signal 18 for each floor are input to the input buffer 15 from each floor and car. Similarly, one hall call registration light 19 and one car call registration light 20 on each floor are output from the output buffer 16 to each hall and car on each floor.

The microcomputer 11 thus inputs the hall call button signal 17 and the car call button signal 18 manually input in parallel through the input buffer 15, and processes them according to a program stored in the read-only memory (ROM) 14 in advance. The hall call registration light 19 and the car call registration light 20 (=output) are carried out through the output cover sofa 16.

In this way, the signal transmission in the conventional elevator control device is parallel transmission, so each signal line is directly input to and output from the microcomputer 11 one by one.

Therefore, in order to transmit signals to the halls on each floor, there is a lot of wiring inside the hoistway, and the space and installation work for the wiring ducts is a problem.In addition, in order to transmit signals to the cars, a large number of tail cords are used. Installation and maintenance have become a major problem as a result of this trend.

[Purpose of the invention]

The present invention has been made in view of the above points, and reduces the number of signal lines for transmitting signals between the elevator control device installed in the elevator machine room and each floor hall or car.
To provide an elevator signal transmission device that is easy to install and maintain.

[Summary of the invention]

The present invention provides a main station consisting of a small computer installed in an elevator control device installed in an elevator machine room, and a remote station consisting of a small computer installed on each floor or at the bottom (=small computer @1: installed on each floor), each of which receives a pair of signals. The above objective is achieved by connecting the devices with wires and serially transmitting signals between them using a bus method.

[Embodiments of the invention]

Hereinafter, two embodiments C of the present invention will be described with reference to FIGS. 1 to 7. It should be noted that the same elements as those in FIG. 9 already explained are given the same reference numerals and their explanation will be omitted.

FIG. 1 is a diagram showing the overall configuration of an embodiment of the present invention.

Conventional control device (=corresponding main station 21,
Remote station 22 installed in the hall on each floor.
23.24, Remote station 2 installed in the car
5, a transmission line 26 that connects these in a bus manner through a pair of signal lines, and a remote station 22 for each of the halls.
23, 24 (:, a hall call button 17 for inputting a hall call signal, a hall call registration light 19 that lights up in response to a hall call registration completion signal output from the remote stations 22, 23, and 24 of each hall, and the above-mentioned cage. A car call signal is input to the remote station 5 of the car.The car call registration light 20 lights up when the car call registration completion signal is output from the car call button 18 and the remote station 25 of the car.
(: It is composed of more.

FIG. 2 is a block diagram of the main station 21 and remote stations 22 and 22, which are central processing units (CPu) that execute programs.
12. Random access memory Cm for storing data
O13, Read-only memory (ROM) for storing programs 14, Input buffer 15 for inputting signals from the outside, Output buffer 16 for outputting signals to the outside, Serial communication unit (8CU) for serial transmission with the outside 31. The input and output are transmitted through the transmission line 26 (:
It is composed of a line driver and line receiver 34 that interface, and a timer 321 that generates a clock signal CLK that determines the transmission speed.

The transmission path 26 used in this embodiment is of the bus type, and the bus driver 33 and bus transceiver 34 are of the multi-drop type.

Serial communication unit (SCU) 31
is the central processing unit (CPU) 1
Parallel data input from 2 can be converted to serial data using a predetermined method and output, or serial data input from an external source can be converted to parallel data using a predetermined method! = convert 'C central processing unit)
It is output to the CPU 12.

Next (: An embodiment of the transmission method of the present invention using the transmission line 26 will be described.

The transmission method in this embodiment is a cyclic scan method, and the control authority for transmission is given to the main station (shown in Figure 1).
MS) 21 has it.

The transmission method will be explained below with reference to FIGS. 3 to 7. In order to make the explanation easier to understand, the main station (Ms) 21 is one station, while the remote stations are R8I, 几82. The case of three stations of R83 will be explained.

First, Figure 3 (near address map) is shown.

Main station (MS) 21 secures 8 addresses and outputs data (D10 to D12) and input data (
D13 to D15) l: Divide and assign one to each remote station. For example, address person 10 sends data D 10 to the main station (M
S ) 21 outputs and the remote station (Rsl
) is the address to enter. On the other hand, address A13 is the address at which the remote station (R81) outputs the data D13 and the main station (MS) inputs it.

In this way, for addresses A iO 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 of all, at time T1 (= main station (
MS) sends address data (A 1.0 ) to the transmission line 26
Output. Each remote station R8I, R82,
R83 inputs this address data (A 10 ) and checks whether it is an address assigned to it or not. If the address is assigned to itself, it immediately checks whether the address is for output or input. is determined, and data is input/output to the transmission line 26 at time T.

In other words, the remote station ('FLsi) 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 (MS) that outputs the address data (AIO) immediately checks whether it is for output or input and inputs/outputs the data.

Therefore, the main station (MS) is
O) is for output, so the data stored there (D
IO) to the transmission line 26 at time T.

When such processing is performed continuously up to address (A15), data input/output to and from 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, +T2+ ・=-+ 'I', 2+T,
X 12 where Ta: processing time.

In the above explanation, the remote station data was assumed to be one input and one output, but in the case of a basket remote station, several or more pieces of data are required for each.
This can be easily handled by increasing the memory space of the main station (Ms).

The processing flowchart of the main station (MS) explained above is shown in FIG. 6 (-), and the processing flowchart of the remote station (几S) is shown in FIG. 7 (=).

As described above, in this embodiment, the signal transmission for call registration and display has been limited, but it can also be used for signal transmission for other driving mode switches, lanterns at landings, and chimes without detracting from the effects of the present invention. .

In addition, since the transmission path of the remote station is a pair of transmission lines 26 based on a bus system, it can be easily expanded by increasing the address space of the transmission memory of the main station. A board and a manager's room (-) are also provided to allow signal transmission.

When transmitting from a relatively distant location such as a cage or a monitoring board, an electrical-to-optical converter 91 is installed in the middle of the transmission line 26 as shown in Figure 8 (=) to improve the noise resistance of the transmission line. , C2, which can be easily and inexpensively connected by connecting them with an optical fiber 92.

〔Effect of the invention〕

As explained above, according to the present invention, the number of wires between the control device installed in the machine room of the elevator and the hall and the car can be greatly reduced. Furthermore, since the hall and the car can be connected by a pair of signal lines, there is no need to provide two signal lines for the hall and for the car, thereby providing an elevator signal transmission device that is easy to install and maintain. be able to.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the present invention, Fig. 2 shows an embodiment of the main station and remote station of Fig. 1, and Figs. 3 to 5 are the same as those shown in Fig. 1. FIG. 6 is a flowchart of the transmission process of the main station of the embodiment shown in FIG. 1, and FIG. 7 is a diagram for explaining data transmission of the embodiment shown in FIG. 1. A flowchart of the transmission process, FIG. 1 is a diagram showing another embodiment of the present invention, and FIG. 9 is a diagram showing a conventional elevator signal transmission device. 21...Main station 24-25...Remote station 26...Transmission line (7317) Agent Patent attorney Noriyuki Chika (Idiot 1)
Name) Figure 1 Figure 2 Bus Rai〉 Figure 3 Figure 4 Figure 5 γt 72A 3T Graduation TS Tt2 Figure 7 Figure 8

Claims (1)

[Claims] 1) A pair of bus systems including a main station installed in a control device installed in an elevator machine room and remote stations installed on each floor or at least one remote station installed in a car. A signal transmission device for an elevator, characterized in that it is connected by a transmission line. 2) The elevator signal transmission device according to claim 1, wherein an optical fiber is used for the transmission line.