JPS6153985B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device for serially transmitting elevator signals.

A group management elevator is composed of a group management device that manages a plurality of cars as one group, and an individual car control device that manages the operation of each car. Signals are exchanged between the group management device and each unit control device. Recently, many of these devices have been using electronic computers, and in this case, the above-mentioned signals are usually transmitted and received by serial transmission. This will be explained with reference to FIGS. 1 to 3.

In Figure 1, 1 is a group management device, 2 is a central processing unit (hereinafter referred to as CPU) that performs various operations necessary for group management such as registering, canceling, and allocating hall calls, and 3 is an instruction and various data given to CPU 2. (hereinafter referred to as memory), 4 to 6 convert one batch of parallel data into an 8-bit serial signal and transmit it, and convert the 8-bit data received in series to one batch of parallel data. Well-known signal transmission device for converting into data, 7
is a group of common signal lines (hereinafter referred to as bus) used for exchanging data between the CPU 2, memory 3, and transmission devices 4 to 6, and includes address, data, and control signals such as writing and reading. There is. 8
9 is a transmission device similar to transmission devices 4 to 6, and 10 is a car position, car call, and group control device sent from the group control device 1. CPU 11 performs calculations to manage the operation of each car based on information such as upcoming allocations.
A memory 12 stores instructions and various data given to the CPU 10, and a bus 12 is used for exchanging data between the CPU 10, the memory 11, and the transmission device 9.
It should be noted that only the necessary parts of the group management device 1 and each unit control device 8 are shown for purposes of explanation.

In FIG. 2, ST is a signal for prompting the CPU 2 to start transmission, such as a timer interrupt. W ₀ to W ₇ are signals for giving the transmission data stored in the memory 3 to the transmission devices 4 to 6, and TD0 to TD7 are serial data signals sent from the transmission device 4 to the transmission device 9. The data is shown in Figure 3, but there are 8 types (8 bits)
It is equipped with a start bit, parity bit and stop bit outside.

In FIG. 3, a to h indicate eight types of data, and subscripts 0 to 7 indicate the number of each car. For example, if a is the allotted call for going up to the landing on a specific floor, if a ₀ becomes "1", this indicates that there is an allotted call for going up to that floor in car No. 0.

Assume now that a series of group management calculations has been completed and the results have been stored in the memory 3. At this time, the structure of the stored data is often as shown on the left side of FIG. That is, one specific type of data is stored in one byte, and each bit in one byte indicates data for that machine. This is due to the characteristics of group management calculations, and is because if all the data from each machine is contained in one byte, there is an advantage that calculation time can be reduced. For example, when searching for a car with a fixed driving direction within the management, if each bit corresponds to data from each machine, one byte of data indicating the car in the management and whether the direction is fixed or not. The desired data can be obtained by simply ANDing 1 byte of data. If the data state is as shown on the right side of Figure 3, at least 8 bytes of data must be accessed in order to perform the above operation, and the operation time will increase dramatically. .

However, when transmitting data to each control device 8, the transmission device 4 can only send and receive data in bytes, so it must be converted into the form shown on the right side of Figure 3, and each byte must be It is necessary to make sure that all data is for a specific machine before giving it to the transmission device 4.

FIG. 2 shows a state in which the converted data is given to the transmission device 4, converted into a serial signal, and transmitted. In other words, the CPU 2 receives an interrupt signal ST from a timer, etc.
When ~m+7 data are written to the transmission devices 4 to 6 one after another, the transmission devices 4 to 6 perform parallel-to-serial conversion and transmit signals TD0 to TD7. A description of the reception will be omitted, but the data received in the same way as the transmission and read into the memory 3 has the form shown on the right side of Figure 3, so before using it for group management calculations, the data on the left side is is converted into a form like .

In this way, the 1-byte data received from the memory 3 is serially converted and sent to the controller 8 of each machine, and the data received from the controller 8 of each machine is
In order to convert bit serial data into parallel data, transmission devices 4 to 4 for the number of cars managed by the group management device 1 are used.
6 is required. Furthermore, the data structure resulting from the characteristics of group management operations as shown in FIG. 3 must be converted.

The present invention aims to improve the above-mentioned drawbacks, and aims to provide a signal transmission device for elevators that does not require a dedicated transmission device for each elevator and can automatically convert data structure. do.

An embodiment of the present invention will be described below with reference to FIGS. 4 and 5.

In Figure 4, 15 and 16 are terminals in which the byte data taken in from terminals DI ₀ to DI ₇ are received in the order in which they are taken in.
The transmission buffer, which can be retrieved from DO ₀ to DO ₇ and is commonly referred to as a first-in first-out memory (FIFO memory), is capable of storing at least 11 bytes of data in this embodiment. 17
is a timing generator that generates timing for transmission and reception. The rest is the same as in FIG.

In Figure 5, WR is the transmission buffer 16 from CPU2.
RD is a signal for loading the data stored in the transmission buffer 15 into the CPU 2. TC and RC are signals for controlling bits of transmission and reception, respectively, and the pulse interval is the same as the serial data signal. is equal to the 1-bit data width of Further, the pulse of the signal RC occurs at an intermediate position after the pulse of the signal TC. Each CT is a control device 8
This is a signal for giving the timing of transmission from the group management device 1 to the group management device 1.

Next, the operation of this embodiment will be explained.

It is now assumed that the group management calculation has been completed and the data of the calculation result is transmitted to each unit control device 8.

First, CPU2 signals #OO (hexadecimal data)
The first pulse of WR is used to write data to the transmission buffer 16, and then the data stored in the memory 3 shown on the left side of FIG. The data is written into the transmission buffer 16 at the ninth pulse. Next, with the 10th pulse, the exclusive OR of the data from address n to address (n+7) is performed, and one byte of data (parity) is generated for each bit.
is written to the transmission buffer 16. Finally, write #FF (all bits are "1") with the 11th pulse. The 11 bytes of data thus written are then sent out by the signal TC issued from the timing generator 17 as shown by signals TD0 to TD7 in FIG. That is, it will be transmitted in exactly the same form as shown in FIG.

In this way, the data of the calculation result stored in the memory 3 can be written as is, and there is no need to convert the structure of the data as in the prior art.

Next, in the case of reception, the transmission device 9 in each control device 8 receives the signal CT from “H”.
The transmission is to begin. Therefore, the signals RD ₀ to _{RD 7} sent from each unit control device 8
(not shown), the data for all the units arrive at the terminals DI ₀ -DI ₇ of the transmission buffer 15 in the same way as the signals TD ₀ -TD ₇ . Therefore, the signal generated from timing generator 17
If the RC is used to capture the signals into the transmission buffer 15, the signals sent in series will be captured into the transmission buffer 15 at an intermediate point after the bits, and the same reception as described for reception in Fig. 1 will be performed. will be held.

In this way, the data taken into the transmission buffer 15 is taken into the memory 3 by the read signal RD issued from the CPU 2, and the structure of the data is shown on the left side of FIG. Similarly, there is no need to convert the structure, and it can be used in group management operations as is.

As described above, the present invention provides the control device 8 for each
The signal is received at the first terminals DI ₀ to DI ₇ from Already, each bit corresponds to each elevator. In other words, it is in the state shown on the left side of FIG. 3 according to this application.
The subsequent second storage device 3 and second transmission buffer 16 also have the same image as shown on the left side of FIG. 3.

However, when serially transmitted from the second terminal DO ₀ to DO ₇ , since this second terminal corresponds to a bit, the bit signal at the same position is transmitted to each unit control device 8. . In other words, signals from other elevators will not be sent together.
Arithmetic processing in each unit control device becomes easier.

In addition, as the signal arrangement structure is converted as signals are sent and received between each unit control device and the group control device, processing calculations for data structure conversion are no longer required, improving computer processing ability. It has the effect of

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a conventional elevator signal transmission device, Fig. 2 is an explanatory diagram of the operation of Fig. 1, Fig. 3 is a storage data structure diagram of the storage device shown in Fig. 1, and Fig. 4 is the present invention. 1 is a block diagram showing an embodiment of an elevator signal transmission device according to the present invention, and FIG. 5 is a diagram corresponding to FIG. 1, and FIG. 5 is an explanatory diagram of the operation of FIG. 1...Group management device, 2...Central processing unit, 3...
...Storage device, 8...Each unit control device, 9...Transmission device, 10...Central processing unit, 11...Storage device,
15, 16...transmission buffer, 17...timing generator, and the same parts in the drawings are indicated by the same reference numerals.

Claims (1)

[Claims] 1. Transmission of signals between a control device provided for each of a plurality of elevators managed as a group and a group control device provided in common to the elevators and managing the elevators as a group. In the case of the above-mentioned control device, a first one is provided in each control device and stores the control signal in units of one byte in correspondence with bits.
a storage means, a transmission means for converting the one-byte signal into a serial signal in synchronization with a timing signal and outputting it to the group management device, and a plurality of transmission means provided in the group management device corresponding to the elevators. a plurality of first terminals for receiving the serial signals from the first terminal, each bit corresponding to the first terminal, and receiving signals from each of the first terminals in synchronization with the timing signal in units of one byte; a first transmission buffer for storage; the first transmission buffer performs a group management operation based on the signals taken in from each of the first terminals, stores the results bit by bit in correspondence with the elevator, and stores the results in units of one byte; a second storage device for storing data; a second transmission buffer that receives the signal in units of one byte from the second storage device and outputs the signal in units of one byte in synchronization with the timing signal; and from the second transmission buffer; A signal transmission device for an elevator, comprising a plurality of second terminals provided corresponding to each bit of the one-byte signal to be outputted and distributingly transmitting the second terminals to the respective corresponding control devices of each car.