JPH02253394A - Two-wire display device - Google Patents

Abstract

PURPOSE:To reduce the delay time of a display operation for an operation input by accessing only an operating device along machine type data about a main controller in a normal state, and supervising whether or not display alteration is inputted. CONSTITUTION:In a main controller 200, a storage device, which applies a series of addresses to the all input means possessed by the respective display windows of a display device 400 and operating devices 300, 600, stores the specific address out of the addresses allocated to the respective display devices and the operating devices as the representative address of each equipment, and stores the machine type data to discriminate whether the device is the operating device or the display device, and a retrieve means, which accesses only the operating device by the stored machine type data and retrieves whether or not the data are inputted, are provided. Further in the normal time, only the input means of the operating devices are successively accessed, and the presence/absence of the input operation is retrieved. Since in such a type of the two-wire display device, the number of the display windows are larger than the number of the input means in many cases, the presence/absence of the input can be detected in a short time.

Description

[Detailed description of the invention] "Industrial application field" This invention can be used, for example, in companies, schools, government offices, etc., to display the status of employees' arrival and departure from work, or to display pros and cons in meetings attended by a large number of people. This invention relates to a two-wire display device capable of

``Prior art'' As proposed by Motoyama in ``Japanese Patent Publication No. 31785/1985,'' a two-wire signal transmission path is used to control a display device with multiple display windows to display arrival and departure information. We have proposed a two-wire display device that performs this function.

The two-wire display device proposed earlier has a two-wire signal transmission line with a main controller, multiple displays controlled by the main controller, and multiple operating devices that switch the display state of the display. Each display and controller counts the reference clock sent from the main controller, and when this counted value is assigned to itself and matches the address, data is exchanged with the main controller, and the controller receives the input signal. The display device operates in such a way that the received operation command data is sent to the main controller, and the display device takes in the display data at the timing of its own address.

The concept of this method will be briefly explained using FIG. The operating device 1 and the display 2 are provided with rotary changeover switches 3 and 4, and the rotary changeover switches 3 and 4 perform switching operations in synchronization with each other.

The operating device 1 is provided with operating switches 5A to 5N, and the operating switches 5A to 5N are assigned to each user.

The display device 2 is provided with a temporary memory device 6, and the operation switches 5A to 5N sent from the transmitter 1 are stored in the temporary memory device 6.
The information representing the state of the indicator lights 7A to 7N is controlled to be turned on or off based on the stored output.

Indicator lights 78 to 7N are indicators 2A shown in FIG.

It is arranged corresponding to the goodwill WD of 2B, and each user's name drawn on the window WD is switched between illuminated and non-illuminated states to indicate whether the user is present or absent.

The previously proposed two-wire display device utilizes the operating principle shown in FIG. 6, and the rotary selector switches 3 and 4 are configured with electronic circuits.

That is, as shown in FIG. 8, a reference clock generator 11, an operating device 12, and a display 13 are connected to a two-wire signal transmission line 10. The operating device 12 and the display 13 are provided with address registers 12A and 13A, and the address registers 12A, ! : Count the reference pulses output from the reference pulse generator 11 at 13A, and turn the rotation selector switches 3 and 4.
Perform the same action as .

The operating device 12 operates an operating switch 5 corresponding to an address determined by the order number of each reference pulse in synchronization with the reference pulse.
The on and off states of A to 5N are read and control information representing the states is sent to the two-wire signal transmission line IO.

The display device 13 takes in the control information sent in synchronization with the reference pulse into the display driver 13B, and displays the indicator lights 7A, 7B, .
...Controls 7N to turn on or off.

"Problem to be solved by the invention" The two-wire display device proposed earlier has each operation switch 5A to 5.
N and the display window are assigned addresses determined by the order of the reference pulses.

Therefore, as the number of windows on the display and the number of operation switches on the operation device increases, the cycle of accessing the operation switches becomes longer (as a result, the display assigned to the operation switch after operating the operation switch becomes longer). The disadvantage is that it takes a long time until the state of the window actually reverses.

In other words, there is a time delay in response to the operation input of the operation switch until the state of the display window changes, and because of this, the state of the window does not change even if you operate it, so you have to repeat the operation many times. You may end up performing an incorrect operation.

The object of the first invention of this application is to provide a two-line display device that can reduce the delay time of display operation with respect to operation input even if there are a large number of display windows.

A second object of the invention of this application is to provide a two-line display device that can prevent erroneous operations even when the number of display windows increases and there is a delay in display operation.

"Means for Solving the Problem" The first invention of this application provides an operation comprising a plurality of display devices each having a display window, and a manual means for switching the display state of each display window of the plurality of display devices. a main controller that has a main memory that stores display data input from the controller, transfers the display data stored in the main memory to the display, and controls the display state of each display window. In a two-wire display device consisting of a main controller, a display, and a two-wire transmission line connecting each of these main controllers, displays, and operating devices, a In addition to assigning a series of addresses, a specific address among the addresses assigned to each display device and operating device equipped with multiple display windows is stored as a representative address for each device, and it is also possible to determine whether the device is an operating device or not. It is equipped with a storage device that stores model data for distinguishing whether there is a device, and a search means that accesses only the operating devices based on the model data stored in the storage device and searches whether or not there is an input to each operating device. This paper proposes a two-wire display device.

In the second invention of this application, an address is attached to each input means of the display window and the operating device, and the display window and the operating device are sequentially accessed according to the address, and the display state of the display window and the presence or absence of input operation of the input device are read. In the two-wire display device configured as above, a display element is provided corresponding to each input means of the operating device, and when a display change is input from the input means, this display element is made to blink at a predetermined period, and the display window The present invention provides a two-wire display device configured to detect completion of display change and stop blinking.

According to the first invention of this application, only the input means of the operating device are sequentially accessed at all times to search for the presence or absence of an input operation. In this type of two-wire display device, the ratio of the number of display windows on the display to the number of input means on the operating device is about 20 to 30%, assuming that the total number is 100%. In other words, the number of display windows is usually greater than the number of input means.

For this reason, it is usually possible to find out whether or not an input has been made in a short time by sequentially accessing only the manual means and searching for whether or not an input to change the display has been made.

According to the second invention of this application, by applying human power to change the display from the human power means, the display element provided corresponding to the input means starts blinking immediately after the input operation, and the result of the input is displayed on the display. will stop blinking.

Therefore, even if there is a slight delay in the display change operation of the display device, it is known by the flashing operation of the light emitting element that the input has been accepted, and it is possible to prevent the operator from operating the input means repeatedly. As a result, it is possible to provide an easy-to-use two-wire display device that is free from erroneous operations.

"Example" Fig. 1 shows an overview of the entire invention.
ON indicates a display, and 600A to 60ON indicate a single operator. These main controller 200, operating devices 30'OA to 30ON
, the display devices 400A to 40ON are each connected to a two-wire signal transmission line 100, and the display data is exchanged through the two-wire signal transmission line 100.

Operator 300 connected to one main controller 200
The number of A-30ONs, displays 400A-40ON, and single operating devices 600A-60ON is about several tens to several hundred, and the total number of display windows is determined by the capacity of the memory provided in the main controller 200. Typically, 8000 display windows are controlled.

Furthermore, the names (personal names, etc.) displayed on the display window can be for about 256 people. In other words, the controller 300A~
30ON and input means SW provided in the single operator 600
The total number of cases will be 256 people.

This number is determined by the capacity of the third storage device, which will be described later, and can be expanded by increasing the storage capacity of the third storage device.

In the following explanation, we will explain the case where it is applied to an indicator for employees coming to work and leaving work. Therefore, the name displayed on the display window will be expressed as a user number attached to each job title.

Main controller 200. Operator 300A to 30ON.

display! In this example, 5400A to 40ON each have a built-in microcomputer MPU, and each part is controlled by the microcomputer MPU.

In the first invention of this application, as shown in FIG. 1, a plurality of displays 400A, 400B, 400C, .
and each display window W of the plurality of indicators 400A to 40ON.
A plurality of operating devices 300A to 30ON equipped with a plurality of input means SW for switching the display state of D and a display window WD for displaying the state inputted by the input means SW, and a single display window WD and a single display window WD. A plurality of single display operating devices 600A to 60ON equipped with input means SW are connected to the two-wire signal transmission line 10.
In the two-wire display device configured to be connected to
In addition to assigning consecutive addresses to all input means SW that 0ON has, a specific address among the addresses assigned to each display device equipped with multiple display windows and an operation device equipped with multiple input means SW, and a single address are assigned. The address assigned to one controller is stored as the representative address of each device, and
The main controller 200 is characterized in that a first memory device is provided in the main controller 200 to store model data indicating whether the device is a display device or an operating device at each storage location of the representative address.

This first memory device is designated by the reference numeral 12 in the block of the main controller 200 shown in FIG.
It can be constructed using AM, and if a 1-byte address symbol is used, for example, representative addresses of 256 devices can be managed. Furthermore, if a 2-byte (16-bit) address signal is used, representative addresses of 36,000 devices can be managed.

The representative address representing each device is the operating device 30 shown in FIG.
The settings can be made using an address setter indicated by the reference numeral 20 in the blocks 0A to 30ON and the displays 400A to 40ON. This address setter 20 can be configured by, for example, a dip switch.

The representative address set in the address setter 20 can be, for example, the minimum address (or maximum address) assigned to each device.This representative address is taken into the main controller 200 at the time of initial setting and stored in the first memory 12. At the same time, the window number data and model data of each device to be written to the first memory 12 are input from the keyboard 11 (FIG. 2) provided in the main controller 200, or each operating device 3
Portable keyboard 7 used by connecting to 00A to 30ON, display 400A to 40ON, or single operator 600
00 (Figure 2) can be done manually.

Window number data representing the number of windows of each device inputted from the keyboard 11 is directly written into the window number storage area of the first memory 12. Further, the window number data input from the portable keyboard 700 is stored in a memory provided in each device, read into the main controller 200 in the initial setting mode, and written into the first memory 12.

Here, the main controller 200 and the operating devices 300A to 30ON,
Display 400A~40ON, single operator 600A~60
The configuration of ON will be explained using FIGS. 2 and 3.

Main controller 200, operating devices 300A to 30ON, display 4
00A to 40ON and a single operator 600A shown in FIG.
~60ON has a built-in microcomputer MPU, and the operation of each part is controlled by this microcomputer MPU.

As is well known, the microcomputer MPU has a central processing unit (hereinafter abbreviated as CPU) 1, a one-way only memory (hereinafter abbreviated as ROM) 2, a RAM 3, an input/output port 4, an input port 5, and an output port. It is composed of

Microcomputer MPU that constitutes main controller 200
A keyboard 11 used for initial settings, etc., and successive output terminals of a first memory device 12, a second memory device 13, and a third memory device 14 are connected to the input port 5 of the computer.

These first memory device 12 and second memory device 1 are in the output port.
3. Connect each write input terminal of the third storage device 14 and transfer various data obtained through the two-wire signal transmission path 100 to the first
The operation of writing to the memory 12, the second memory 13, and the third memory 14 is performed.

Along with this, a display 15 is connected to the output port so that the settings can be monitored during initial settings.

The input/output boat 4 is inserted between the microcomputer MPU and the two-wire signal transmission line 100, and performs the operations of outputting display data from the main controller 200 to the two-wire signal transmission line 100, and the two-wire signal transmission line. An operation is performed to fetch display data from 100.

The operating device 300 includes a microcomputer MPU, input means SW, a display element 301, and an address setting device 20.

The input means SW is constituted by a switch connected to a switch matrix circuit. One group of lines of the switch matrix circuit is time-divisionally driven by the output port, and the other group of lines is connected to the input port 5, and it is determined which switch has been operated and the result is stored in the RAM 3.

The display element 301 can be, for example, a light emitting diode, an incandescent bulb, a liquid crystal, or another display element using a mechanical reversing mechanism, and these display elements are controlled to turn on and off by a matrix circuit connected to the output port. .

Each display element 301 is attached at a position to illuminate a display window WD provided in each of the operating devices 300A to 30ON.The illustrated example shows a case where a light emitting diode is used as the display element.

The input port 5 is connected to the address setter 20 and a connection port 5A of a portable keyboard 700 used during initial settings and settings changes.

The input data inputted from the input means SW is transmitted to each operating device 30.
0A to 30ON and the single operating device 600A to 60ON are stored in the RAM3 of the microcomputer MPU, and the operating device is stored in the RAM according to the timing from the main controller 200.
3 is sent back to the main controller 200.

Furthermore, the address set in the address setting device 20 is also set in the main controller 200 depending on the timing of the main controller 200 at the time of initial setting.
and is taken into the RAM 3 of the main controller 200.

Furthermore, each operating device 300A from the portable keyboard 700
~30ON (Figure 1) includes the address attached to the display window WD, the number of windows data, the user number data attached to the job title displayed on each display window WD, and whether it is the operating device. Enter the model data indicating whether it is a display device, etc., and enter the window address, window number data, user number data, and model data in the R of each operating device 300A to 30ON.
It is written in AM3, sent to the main memory 200 according to the timing from the main memory 200, and further transferred from the main memory 200 to each display 400A to 40ON.

Display units 400A to 40ON are microcomputer MP
υ, a display element 401, and an address setter 20. Input port 5 has a portable keyboard 70
0 connection port 5A and address setting device 20 are connected.

A display element 401 is connected to the output port.

This display element 401 is controlled to turn on and off by a matrix circuit connected to the output port, similarly to the display element 301 of the humidity generators 300A to 30ON.
1 is each display window W of the display devices 400A to 40ON (Fig. 2)
It is installed in a position that illuminates D.

The single operating devices 600A to 60ON are composed of a microcomputer MPtJ, an address setting device 20, an input means SW, and a display element 601, as shown in FIG. Single operator 600A to 60ON has one display window WD
and a light emitting element 60 at a position that illuminates the display window WD.
Install 1.

As described above, each operating device 300A to 30ON, display device 4
00A to 40ON and single operation devices 600A to 60ON are provided with an address setting device 20.
The representative address of each device is set by 0.

Therefore, using this representative address, the main controller 200 sends display data to each device and identifies data sent from each device.

In other words, at the time of initial setting, each operating device is set to 300A to 30ON.
Indicator 400A~40ON and single operator 600A~6
The representative address of each device is set in the address setting device 20 provided at 0ON. This representative address is the main controller 200
and stored in the first memory 12 of the main controller 200.

As a method of reading the representative address set for each device into the main controller 200 in the initial state, the following methods (1) and (2) can be considered.

(2) Access all addresses attached to the display window WD of each device from the main controller 200 and check whether a representative address is set.

At an address where a representative address has been set, that address is stored in the first memory 12 of the main controller 200 as a representative address.

At the same time, if the window number data and model data of each device are set in the RAM 3 of each device, the window number data and model data are also transferred to the main controller 200, and the first memory 12
written to.

■ Set a representative address in the address setter 20 of each device, input the representative address from the input keyboard 11 of the main controller 200, and write the representative address of each device in the first memory 12; Write the window number data and model data of each device to each representative address.

In this way, the representative address, window number data, and model data of each device are taken into the first memory 12 provided in the main controller 200, so that the main controller 200 can use this representative address to control each device. are accessed in order and data is exchanged.

The main controller 200 has a second memory 1 in addition to the first memory 12.
3, and this second storage device 13 stores user number data associated with the person's name displayed on each display window WD. This user number data is written directly from the keyboard 11 of the main controller 200 to the second memory 13 at the time of initial setting, or written from the portable keyboard 700 to the RAM 3 of the microcomputer MPU provided in each device. , outputs the user number data stored in this RAM 3 in response to a call from the main controller 200, and
and writes it into the second memory 13.

The user number data stored in the second storage device 13 is represented by sequential numbers attached to all input means SW provided in each of the operating devices 300A to 30ON and 600A to 60ON. That is, an address for receiving access from the main controller 200 and a user number for setting the user of the window are attached to the input means SW. This user number is provided to allow window users to easily change settings.

The main controller 200 is further provided with a third memory 14 in addition to the first memory 12 and the second memory 13. This third memory 814
stores display data at each address that is accessed using the user number stored in the second storage device 13 as an address.

This display data indicates data input from each input means SW of the operation devices 300A to 30ON, and each display device 400A
~40ON and each display window W of the operating device 300A~30ON
Indicates the display state of D.

Generally, the display status of the display window WD is two-valued, ``Coming to work'' and ``Leaving work.'' However, in addition to turning on and turning off, light-emitting elements with different emission colors are used to indicate the status of coming to work, leaving work, business trip, and other colors.
In some cases, it is a four-value value that indicates absence, etc. Like this 4
When displaying a value, the third memory 14 stores two values for each address.
It is sufficient to have a storage capacity of bits.

Using FIG. 4, the first storage device 12, the second storage device 13, the third storage device
Each data stored in the storage device 14 and the relationship between each data will be explained.

Each address ■, ■, ■, ■ of the third storage device 14.

Display data ON10FF is stored in 0.

Addresses ■...G of this third storage device 14 are prepared for several users, and each address ■, ■, ■...
...Assign G to the user number.

Address AD1. of second storage device 13. A.D.O, A.D.

...... is each display window WD and operation device 300A to 30O
Corresponding to the addresses attached to the input means SW of N, each address A D + , A D *, A D s...
・Write the user number data (address signal of the third memory 14) ■, ■i■...θ to ADI+. This writing can be done using the keyboard 11 provided in the main controller 200 or each device 300A. This is done from the portable keyboard 700 connected to the connection port 5A provided in ~30ON or 400A~40ON.

Addresses AD, , AD, , AD of the second memory 13!・・・
...ADH is the input means SWO number and window WD of the operating devices 300A to 30ON and the display devices 400A to 40ON
Multiple address blocks AA depending on the number of.

It is divided into BB, CC...NN. A representative address for each device is determined in each address block AA, BB, CC, . . . NN. In this example, the hatched addresses AD, ADI, etc. in Figure 6, which shows the case where the minimum address in each address block AA, BB, CC...NN is the representative address, are representative addresses. Indicates an address.

Each address AD+, ADt, ADx, ADa...
....Write the user number ■, ■, ■, ......■ to ADH using the window WD or input means SW 0 Window WD of display 400A to 40ON and operation device 300A
If the total number of input means SW of ~30ON is, for example, 8000, then 8 bytes of memory is used.

Each address A+, Ax, A3° of the first memory device 12.
...A8 stores the representative address of each device, the number of windows of each device, and the number of input means. The representative address is stored in each address block AABB, CC, CC, etc. determined by the second memory 13.
. . . refers to the smallest address in NN, and stores this address code in each address A, -AN of the first storage unit 12. Along with this, the number of windows of each device and the number of input means SW (
(hereinafter referred to as window number data) and model data are stored.

The representative address, window number data, and user number data stored in the first storage device 12 and the second storage device 13 are initial setting data, so for example, they are sent from the main controller 200 to each device at the time of daily startup, and are sent to the device itself. Related data is written to the RAM 3 of the microcomputer MPU provided in each device.

On the other hand, the display data stored in the third storage device 14 is always read out and sent to each device along with the representative address, and is compared with the display data stored in the RAM 3 of each device (see Figure 5) to prevent errors. In addition, the operator 300
When the input means SW of A to 30ON is operated and a display change request is issued, the input data is sent to the main controller 200 along with the address and user number, and is stored in the third memory 14.
The display data written to the address corresponding to the user number will be rewritten.

Display element 3 corresponding to the input means SW operated at this time
01 or 601 starts blinking. This blinking operation is executed, for example, by the blink mode of the microcomputer MPU.

When the display data written in the third storage device 14 is rewritten, the third storage device 14 that had stored this display data
The address code (user number) is read from the second storage device 13, and the representative address of the address block containing the corresponding user number, the corresponding window address, the user number,
The display data is output to the two-wire signal transmission line, and the display data stored in the device requested to change the display is rewritten.
The display change is executed.

When the display data is sent back from the main controller 200, the microcomputer that causes the display element 301 to blink takes in this display data and replaces the display data stored in the RAM 3, and also displays the display element 301 or 601. Stops the blinking operation and indicates that the display has reversed to the desired state. When the input means SW is operated, the operation of the display elements 301 and 601 is as follows: If an input operation is performed with the lights off, the display elements will change to a blinking state, and if the blinking state changes to a constantly lit state, and if an input operation is performed with the lights constantly lit. The light may go into a blinking state, and the light may go from a blinking state to an off state.

When the display change is executed, the main controller 200 returns to the normal mode, and the operating devices 300A to 30ON and the single operating device 60
Returning to the state of sequentially accessing only 0A to 60ON, a search is made to see if a display change request has been issued from the operating device.

This search operation is executed by the microcomputer MPU constituting the main controller 200.
will constitute the search means.

In addition to the representative address stored in the first memory 12, a common address can be given to all the devices, and a two-wire display device can be constructed in which simultaneous calling is possible using this common address.

As this common address, any address assigned to the window WD can be used, and for example, it can be the final address or the top address.

In the example shown in FIG. 4, the final address A D w is used as a common address, and this common address ADH is used as the first
It is stored in the final address AM of the storage device 12.

In addition, each operating device 300A ~ 30ON and display device 400A ~
A common address is stored in 40ON and the single operating devices 600A to 60ON. For example, this memory is sent from the main controller 200 to each device each time it is started, and is written to the RAM 3 of the microcomputer MPU installed in each device, or written to the ROM.
2 can be written in advance.

By setting a common address in this way, the same data, such as a start-up command, a stop command, a reset command, etc., can be sent to all devices at the same time, and predetermined processing can be completed in a short time.

"Effect of the Invention" As explained above, according to the first invention of this application, in a state where there is no normal display change request, the main controller 200 turns on the operating devices 300A to 30ON and the single operating device 6 according to the model data.
Accesses only 008 to 60ON and monitors whether there is a display change input.

Operator 300A~300N and single operator 600A~
Since 60ON is less than the number of indicators 400A to 40ON, the number of operating devices 300A to 30ON and the single operating device 600A
The time required to sequentially access all 60 ONs becomes shorter. Therefore, even if a display change request is issued, the display change request can be taken into the main controller 200 within a very short time, and the display change request can be sent to each display 4 within a short time.
It can be transferred to each display section of 00A to 40ON and operating devices 300A to 30ON.

Further, according to the second invention of this application, the display elements 301 and 60 of the operating devices 300A to 30ON and the single operating devices 600A to 60ON are made to blink until the display on the display is actually reversed. Even if the time from when a change request is input until the display change request is transferred to the display section of each display and operation device is a little longer, the display element 3
The blinking of 01 and 601 can indicate that the display data is being transferred. Therefore, since the display does not change even though a display change request is input, it is possible to prevent erroneous operations such as repeating the input operation, and to provide a highly reliable two-wire display device.

[Brief explanation of drawings]

FIG. 1 is a block diagram for explaining the overall configuration of this invention, FIG. 2 is a block diagram for explaining the configuration of main parts of a two-wire display device according to this invention, and FIG. A block diagram for explaining the structure of the single operator used,
Figures 4 and 5 are diagrams for explaining the configuration and operation of the main parts of the present invention, Figure 6 is a connection diagram for explaining the conventional technology, and Figure 7 is a diagram of a two-wire display device. FIG. 8 is a block diagram for explaining the conventional technology. 100: Two-wire signal transmission line, 200: Main controller, 30
0A to 30ON: Operating device, 400A to 40ON: Display, WD: Display window, SW: Input means, 12: First memory,
13: second storage device, 14: third storage device.

Claims (2)

[Claims] (1) A. A plurality of display devices equipped with a plurality of display windows, an operation device equipped with a plurality of input means for switching the display state of each display window of the plurality of display devices, and a single display window. A single controller equipped with a single controller and a single input means is connected to the main controller via a common two-wire transmission line, and by operating the input means provided on each controller, assignments to each input means can be made. In the two-wire display device configured to be able to switch the state of the display window, B. A memory provided in the main controller and storing model data indicating that the display is the display and the operating device. C. A search means for accessing only the operating devices according to the model data stored in the storage device and searching whether or not there is an input to each operating device. . (2) A. Assign a series of addresses to each input means of the display window and operation device, access the display window and operation device sequentially according to these addresses, and change the display state of the display window and the input operation of the input means. In a two-wire display device configured to read presence/absence, B. A display element is provided corresponding to each input means of the operating device, and when a display change is input from the input means, this display element blinks at a predetermined period. A two-wire display device configured to detect that the display change of the display window is completed and stop the blinking.