JPS5875944A - Data transmission system - Google Patents

Abstract

PURPOSE:To increase the speed of a response to a request from a CPU by providing a transmission controller and each terminal equipment with data storage part respectively and constituting an interface part between terminal equipment and equipment in the form of a module of a substrate attachable and detachable corresponding to each kind of input and output signal. CONSTITUTION:In a system which uses a loop network to control numbers of equipment 4, etc., and also to gather data to be generated, therefrom each terminal equipment 6 is provided with a data storage part capable of storing control data from a CPU1 to equipment, etc., to be connected and data gathered from equipment, etc., at predetermined locations. A transmission controller 2, on the other hand, is provided with a data storage part capable of storing storage contents of each terminal equipment at preset locations. Then, the interface part of each terminal equipment for equipment, etc., consists of modules of substrates attachable and detachable corresponding to the kinds of input and output signals. Consequently, an increase and a decrease in the number of equipment are dealed with immediately to increase the speed of a response to a request from the CPU, thus reducing a load on it.

Description

[Detailed description of the invention] The invention concerns the data transmission method.

Traditionally, data from devices, meters, detectors, etc. scattered throughout the space, such as each floor or each room of a building, was collected centrally.
There is a system that centrally controls each device by sending control data from the center to each device. In the data transmission method for this system, a central processing unit (cpU) in a central processing room is connected to a large number of devices, etc.
The terminals on the platform were directly connected to each other by separate transmission lines.

For this reason, as the space becomes larger, an extremely large amount of transmission lines are required, which requires enormous installation and construction costs. This method requires transmission control equipment equal to the number of terminals on the CPU side, and a similar transmission control equipment on each terminal, making the hardware expensive. .

Furthermore, in the case of a management system for a mid-sized building, one terminal device is usually placed on each floor, and devices on that floor are connected to this terminal device. By the way, the devices connected to the terminal include those that use digital signals such as air conditioners, those that use analog signals such as voltage resistance, and those that use pulse signals such as integrated power.
Depending on the model and device, the glaze of the output signal from the terminal and the input signal to the terminal differ. These ILs and other devices with different types of input/output signals are connected to one terminal in a mixed manner, and the terminals have different management points depending on the type of input/output signals.

For this purpose, each device is stationed at the site, and the IL is connected to the required terminal device, and software is installed to input and output data between the terminal device and the CPU depending on the installation state. - is +1dll ”l r tic 7i:ru.

There is no use in connecting every small terminal device.
Since they are different, they have to be differentiated individually in terms of both heart and software, and cannot have versatility. This resulted in high costs, and each time an iso 43 or the like was added or changed, software etc. had to be changed without changing the IL.

Furthermore, according to this conventional method, when the central processing unit is requested, each terminal device must collect data or send control data for the first time, so it takes time each time, and the requested data is Since several phrases are irregular,
The processing time varied each time. In order to deal with requests that occur irregularly, it is safe to manage the machine number of the request data. It takes time to correspond to the end of -F@month, that is, the physical machine number, and if there are requests all at once, a queue will form. Since all of these processes are not performed by the central processing unit, there are many disadvantages such as an enormous burden.

Inventively, the deficiencies in the conventional method of IL and others are eliminated, and all data is transmitted and received in the field 1 between the transmission control device and the valley terminal device, and a storage section 1m for each data is preset. For each type of input/output signal between the terminal and equipment, the interface part between the first data storage part and equipment, etc. is configured as a module with a removable board, and can be adapted to the rice field by increasing or decreasing the number of CRTs. The first data storage section of each terminal device has the maximum capacity for the type of input/output signal of the devices that should be connected to that terminal device, so that the number of devices, etc. can be increased or decreased. It is designed to be able to respond immediately to various situations, to provide versatility, and for this purpose, the hardware configuration of terminals and other equipment is uniform, suitable for mass production, economical, and highly reliable.
The present invention provides a data input/output method that has an extremely quick response speed to requests from a central processing unit, that is, a processing speed, and reduces the burden on the central processing unit.

The invention will be described in detail below with reference to the drawings.

As shown in the first diagram, the unique features of the uninvented structure are:
First, the central processing unit (CPU) 1 has a transmission control device 2 connected to a connection line 3, which always has the latest collected data and control data. For this purpose, the IL must immediately respond to requests from the central processing unit 1.
Ru. Second, the transmission control device 2 and a large number of equipment terminals 4 are connected by a connection line 5 (LEI 1,
LS・2, 5-T, S-5) 6......, connected in series with transmission line 7, all data is transmitted at regular intervals TL
Is Rukoto. Of course, the number of terminal devices 6 . Thirdly, each terminal device is configured as a module with an interface part as a board for each type of input/output with sandboxes etc. connected to this 11, and connected to various devices etc. via this interface device. lf'. Kon
K, you can easily respond to changes in the field by increasing or decreasing the number of boards. Fourth, each terminal has the first data al:! The aCC unit has a built-in storage unit, and this aCC unit has a capacity that can store all the data of the maximum number of management devices that should be connected to the terminal. With this IL, we can immediately respond to increases and decreases in on-site equipment, etc., without having to make any changes to our staff.

As shown in the second diagram, the transmission control device 2 includes a data storage section (MFDB) 8, which is a second data storage section, and is connected to a processing section (microprocessor) 9. The processing unit 9 is connected to a request control interface 6-unit 10 for the central processing unit (CPU), and also has a terminal unit 6...
A transmission control interface unit 11 is connected thereto.

As shown in FIG. It is connected. The processing unit 16 is connected to the transmission control interface unit 11.
is connected thereto, and a field interface unit 15 for devices and the like is connected thereto. As shown in the fourth diagram, this field interface section 15 is constructed of 414 circuit boards configured as modules for each type of input/output signal.
Assume that the circuit is configured as a module with circuits for 12 points on one printed circuit board as a digital output interface (Do1) +5a.

Therefore, for example, if equipment such as air conditioners, detectors, etc. that are controlled by digital outputs of 24 or less are installed at the site, two boards can be built into the terminal and one
．． Bye. Analog output interface (A o 1
/11, )+5b, digital input interface (:
Dj 1/) I 5 c, Pulse input interface (PiI/F) 15 d, Analog human power interface (A1/F) 15θ, also IL.
All the circuit modules are constructed on one printed circuit board with appropriate dots. Therefore, depending on the type of input/output signals, the number of devices, detectors, and measuring instruments installed at the site, it is necessary to install as many different types of boards as possible in the terminal equipment.
T game is good.

As mentioned above, the number of control points for each type of input/output device connected to each terminal device is different, but in a building of a certain size, the number of control points for each type of device connected to one terminal device is different. The maximum number of management points for each can be estimated empirically. Therefore, in the invention, the first data storage unit I, FDB (hereinafter referred to as FLFDB) built in each terminal device 6...
The system must have enough capacity to store all the data on the maximum number of managed devices for each category of attributes that can be estimated based on historical analysis. For example, in a building of a certain size, if the maximum A gift of a Do tower device connected to one terminal is 60 points, the LP
Secure 50 internal organs' worth of memories in the DB. Similarly, if the maximum viscera of the D1 device is 80 small, TJF
D B K secures a quotient of +0a fraction. Thereafter, in the same manner, memory locations for the maximum number of points for each type of Heo, Ai, and Pi are secured.

A second data storage section (MPDB) built into the transmission control device 2
) 8 (hereinafter referred to as MIrDB) and each terminal device 6...
The configuration with the first data storage i(T, FDB) 12 built in is as shown in FIG. That is, the MFDB has control data storage units OUT, 1.OUT, 2.O[r'
T.3 are provided one after another, and then each terminal 46...
・Collected data from storage section N.1゜engineering N.2. Engineering N.
3 are provided sequentially. LFDB built into each 1fC terminal
shows L'FDB of terminal LS-1 as an example, but all have the same mg'i. That is, MPDB
O[JT・1. The control data storage section OUT.+-1f or OUT.2 or OUT.3 corresponding to OUT.2 and OUT.3 is provided at 9-, and the MPDB's N.1. IN・2.
Collected data storage unit IN-1 or I corresponding to Engineering N-5
N.2'f and height IN.6 are provided.

As mentioned above, in LPD B, the maximum number of management points for each type of input/output signal that can be estimated by experience is secured as the maximum capacity, so the control data storage unit OUT・1
Or OUT・2 or (4 OUT・B, sofL
A memory radical is provided corresponding to the maximum number of DO devices, detectors, and Ao measurement instruments connected to the terminal device of 7, and the collected data can be stored. Part IN-1 or IN-2 or IN-3 contains the maximum number of Di devices, detectors, Pi detectors, and Ai correction instruments that should be connected to the terminal of the RT. In response to this, the ii:l Memory Hall was established. And control 1 of the valley device etc. on each aC memory position neck
The data or collected data is stored. M y D B
OUT・1゜OUT・2. OUT・3. IN・1. The MFDB has exactly the same configuration as the other LFDBs.In other words, the MFDB has the same configuration as the LFDBs of all the terminals.

10- Therefore, the control data from the central processing unit i+(c, pty)+ is sent to the control data storage unit OUT・1~0UT of the MFDB.
-5's chair fL or the predetermined words are written into the memory position IL,
In addition, the collected data is the result data of the MPDB.
It is read out from a predetermined 100 million IR of ~1N-5 and supplied to the central processing unit 1. Furthermore, the contents of the MPDB control data storage section are transmitted to each terminal device via the transmission line 7.
'In addition to entering the control data storage section of FD B, the contents of the collected data storage section of LFDB of each terminal are as follows.
It is transmitted through the transmission line 7 and enters the collected data storage section of the MFDB.

Then, the corresponding devices 4 are controlled based on the control data stored in each LFDB. Write size TL at the position.

Note that the LPDB and MPDB also secure storage locations for devices that are not actually implemented, but it goes without saying that control data for cIL's devices, etc., and cIL's +A devices, etc. Since there is no data collected from the above, the data from the above is also written to the storage location.

Referring to FIG. 6, the timing of inventive data transmission and request processing will be explained. Here, an example in which the unit time is 1 second is shown.

The first half of 1 second 1... is the transmission time period Ta
The last 500 milliseconds of one second is the intelligence processing time period Tb.
It is divided as That is, the transmission time period Tapid,
All the control data input to the MFDB from the control data ai:' storage section OUT, + to OUT.3 are sequentially transmitted on the transmission line 7 in bit serial form. Each terminal device (TJS-1 to LS-3) 6... takes in the control data destined for itself and stores this IL in the control data storage section of its own LFDB. Then, each collected data is output from each collected data storage unit to the first eyelid transmission line 7, and bit serial transmission -grL, C-fL is MFDB.
The collected data is stored in the memory sections IN-1 to IN-3. In this way, the transmission time period TaK is determined by connecting the transmission line Z to OUT and 1 as shown in FIG. O [JT・2. OUT meeting 5. ■
N-1°IN・2. Data is transmitted in a transmission data configuration consisting of 6 frames of IN.6.

Next, the ammonium water treatment time period TbK is determined by the central processing unit (c p
U) 17> et al. (7) Control Cheetah+a F D
At the same time, the requested collected data is supplied to the central processing unit 1. At this time, @d
The data to be r is sent to each terminal device 6 500 milliseconds ago.
This is the latest data collected from ... and is immediately supplied to the central processing unit 1. The control data received at this moment is transmitted to each terminal 6 in the transmission time period Ta after 500 milliJ seconds.
Transmission sound to F' D B. By the way, if the equipment to be connected to each terminal is 100A, 10 terminals are connected in series to the transmission line 7, and the input/output information for one device is 1d, for example, During the transmission time period Ta, 1000 points of control data will be transmitted in 10 frames from 0UT-1 to OUT・10, and 1000 points of collected data will be transmitted in 10 frames from IN・1 to IN・10 fL. If, as mentioned above, it is possible to sufficiently transmit the upper a pitator in 500 milliseconds of the transmission time period Ta when the unit time is 1 second in total, then there is still some margin. 1, the total maximum management score is 100 points or more, and 1000. If a large amount of data is required to be transmitted due to control using medium or higher data, it is possible to set the unit time to 1.5 seconds, or change the time between the transmission time Ta and the grafting time Tb. It is also possible to change the ratio as appropriate.

Next, referring to FIG. 8, control data sent from the central processing unit controls equipment, etc., and is confirmed as collected data. state

-1 The control data for the equipment 4 connected from the central processing device 1 to the terminal device 6... is requested by the control interface part during the ammonium water treatment time period Tb -1. 10, and the processing unit 9 outputs the MFDB O[
Assume that data is written to predetermined storage locations of TT@l, 0UT-2, and OUT.3. This control data is output as transmission data from the transmission control interface section 11 in the next transmission time period T a -2. The transmission control interface section 14 of the LS.1 takes in the control mlj data of 0.sigma.T.1, and the processing section 14-1 stores it in the storage location of I) r, p゛DB. OUT・2′J? The control data of frame OU'r.3 is passed through. During this time, sampling is being performed to output control data to the equipment 4 via the field interface 15 and to input collected data. LB・2. Similarly for LS・3, 7L is OUT・2. OUT・3 control data import, 0
are sequentially imported and stored in the valley LFDB, and when it is not the frame of each person, it is between devices etc. 4 / Bling is performed T[
ing. Transmission control interface section 14 of LS3.1
From then on, after the OUT 3 frame has passed, the IN 1
, the collected data is output from the LFDB of LS・1, and the collected data is outputted from the LFDB of LS・2. LS-3 also j Utaji Sonzofl I N・2. Output the collected data of each person to the frame of engineer N-5. Request processing J8! after the output of each collected data is finished! Frame 1 of each OUT during time period TI)-2 and during transmission time period T a-5 of
Then, sampling is performed between the TL, fL, d, etc. 4. During this time, the above control data ■■ (C) controls the equipment, etc. of SorL and IL7L, and becomes a new collected data surface dC, and each of L F and D of LS・1 to LS-5.
B has iC billion. Then, in the transmission time period Ta-5, the control data is transmitted to OU 'I'・1 to OU 'f in the same manner as above.
'-3's IL, fL frame to L 7+']
) After inputting to LFJ) B, the acquired data stored in LFJ) B is output to frames IN.1 to IN.3. At this time, the above control data■■◎
The collected data ΔG■' that confirms the transmission < rt, MFD
I remember DK. Therefore, the next request processing time period T
In I)-5, this collected data ■'heart■' is supplied to the central processing unit 71. at the request of the central processing unit 1. The previous control data ■ (DO confirmation is not available.)

In this way, the time it takes for one control data to be issued and then confirmed is within 3 seconds at the maximum during processing. ttC If you are just looking for collected data,
The latest data is stored in the request processing time period Tb-1, or at the latest in the next request processing time period Tb-2.
Therefore, the processing time in that case is within 1 second at maximum.

As described above, all data is sent and received between the transmission control device and each terminal device. Because of this, there is a correspondence between each Ri' storage location in the data storage unit and each person's power terminal on the terminal unit.
This correspondence will never be affected. Therefore, even if the data memory section has a memory location of 6, there is no device connected to the terminal corresponding to this memory location, so
Even if the contents of the words of the hated monk are transmitted through the transmission method, there will be no problem.

Therefore, it is possible to secure a capacity in the data storage section of the transmission control device and each terminal device to store all the data of the maximum number of devices that should be connected to each terminal device. It is possible to deal with any situation by installing boards of each type, the number of which corresponds to the number of connected devices, etc.

In the embodiment 8e above, we have described the case where data is transmitted bit serially, but this is not limited to IL and is applicable to all data transmissions. With a transmission method such as
It can also be applied to visits.

17- Even if there are many terminals connected to other equipment such as measuring instruments, detectors, etc., each terminal The number of transmission lines is extremely small, and it is easy to add terminals.There is a rl-data 8i for both the transmission control device and each terminal.
ll! Since it is equipped with a storage section and the latest control data and collected data are stored in this data storage section, the processing speed in response to requests from the central processing unit is extremely rapid, which is faster than conventional requests. This reduces the burden on the central processing unit, which previously had to deal with each issue. Since the type of connected equipment, etc., is a module, the interface part is used as a board, so a board of the number according to the type of connected equipment, etc. is built into the terminal as an interface part, and IL This often makes it possible to standardize the hardware configuration of terminal devices, making it more economical and reliable, making mass production possible as interfaces can be standardized, and making management easier, making it easier to install devices at a later date. It is extremely easy to expand the system, and even when expanding the system, the data storage section can be changed at no cost.

[Brief explanation of drawings]

The drawings show an embodiment of the invention, in which Fig. 1 is a block diagram showing the overall structure, Fig. 2 is a block diagram showing the internal structure of the transmission control device, and Fig. 3 is the internal tank of the terminal. Figure 4 is a block diagram showing the 1st attack, Figure 4 is a block diagram showing the horizontal 1ffk of the field interface section, Figure 5 is a block diagram showing the internal configuration of the data storage section built into the transmission control equipment wire terminal, and Figure 4 is a block diagram showing the horizontal 1ffk of the field interface section. FIG. 6 is an explanatory diagram showing the timing of data transmission and request processing, FIG. 7 is an explanatory diagram showing the transmission data structure, and FIG. 8 is an explanatory diagram showing the data flow rL. 1...Central processing bag jdi IOP U)2...
Transmission control device 3... Connection line 6... Terminal (LS
・+, LS・2. LB-5) 7...Transmission line 8...Second data storage unit (MFDB) 9...First
Data memory section (LFDB) 15...Field interface section +5a...Do interface +5b...AO interface +5c...D1 interface +5d...P1 interface 15θ...Ai interface OUT・+, OUT・2,0UT-3...Control data storage unit IN・1. Engineering N・2. lN-3...Collected data storage unit. Figure 4 r6

Claims (1)

[Claims] A transmission control device ffHc'? connected to the central processing unit. !
These terminals are connected in series, and each terminal receives control data from the central processing unit for the maximum number of devices that should be connected to the terminal, and data collected from the devices. A first data storage section is provided in which all data can be stored in a preset storage location, and the entire content of the data storage section of each group 1 is stored in the preset storage location in the Juki Transmission Control System Association. The upper A-P terminal device has a built-in second data storage section that can store data between the first data storage section and the device, etc., for each type of input/output signal between the terminal device and the device, etc. Module 7 is used as a removable board for the interface part between the modules.
1 fil, and all data is sent and received between the upper transmission control equipment and each of the above-mentioned terminal devices.