JPS5910054A - M-n transmitting method of loop type information transmitting device - Google Patents

Abstract

PURPOSE:To realize the m-n transmission of high efficiency as well as a system of high flexibility, by supplying the same real information to each of (n) units of controllers and therefore accelerating the transmitting speed as well as the processing speed of the controller. CONSTITUTION:The selection information equal to the received selection information is stored in a selection memory 2 of a selection circuit of the 2nd- (n+1)th transmitting devices A2-An+1 respectively. Therefore the coincidence signal is delivered from a comparator 4 of a selection circuit of each of the transmitting devices A2-An+1. Thus the scanning operation is discontinued for a scanning circuit 3 and at the same time supplied to a CPU as a desired information signal. Then the real information under being fetched is decided to be needed to own station and transferred to controllers B2-Bn+1. In addition, the selection information equal to the received selection information is not written to the memory 2 with other transmitting devices An+2-An. Therefore no coincidence is detected by a comparator to the selection information of all memory areas of the memory 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an m-n transmission method for a loop type information transmission device, which increases the transmission speed and the processing speed of a control device, realizes highly efficient m-n transmission, and improves the control device's processing speed. Easily handle additions, reductions, or modification of functions.
The purpose is to obtain a highly flexible system.

Generally, a loop information transmission system has N transmission devices (A1) from the first station to the Nth station, as shown in FIG.
Control devices ('B+) to (BN) are connected to ~(AN), respectively, and each transmission device (A1) to (AN) is connected in a loop via a transmission line (C), allowing arbitrary control. Actual information is received and passed between the devices (B+) to (BN).

By the way, in this type of conventional information transmission system, the information frame output from the control devices (B1) to (BN) to the transmission path (C) is configured as shown in FIG. 2, and the information frame is configured as shown in FIG. The source address of the source sending the information to the transmission path (C) is added to the real information, and the real information is received and passed using the destination address and the source address as keys. Here, the frame synchronization word indicates the beginning of the information frame, the CRC indicates the cyclic code check, and the frame end word indicates the end of the corresponding '(74 information frame). When transmitting the same real information to the control devices ('Bl) to (BN), a broadcast address is added instead of the destination address.

In this kind of information transmission system, any one
When transmitting the same real information from each control device to n control devices, for example, control device (B+
) to other n control devices (Iu2) to (13n+1)
When transmitting the same real information, the source address of the information frame is set to address 1 of the own station, and the destination address is set to address 2 to nth of the control device (B2) of the second station.
The address of the control device (Bn+2) of the +1 station is changed in order up to n+2, and an information frame of the same real information is sent to the transmission path (C) n times. In addition, each control device (B1) to (B
N) takes in all the information on the transmission path (C),
If the destination address is the local station address, the actual information is fetched and processed, and if it is not the local station address, it is returned to the transmission path (C) again.
Therefore, the information on the transmission path (C) disappears at the destination.

However, according to the conventional m-11 transmission method, the same real information must be sent n times while changing its destination address in order, which significantly reduces the effective information transmission speed and requires each time the information is sent. Control device (B1
) to (BN) must be transmitted n times,
The processing speed of (BN) to the control device (B1) also decreases,
This results in a decline in the functionality of the control devices (B+) to (BN) and a deterioration in the efficiency of the information transmission system. Furthermore, each control device (B+) to (BN) not only has its own address, but also has a destination address for all real information transmitted to each of the other control devices (13l) to (BN). Therefore, each control device (B+) to (BN) is tightly coupled.

Therefore, when adding a new control device, disconnecting any control device (B1) to (13N), or modifying the function, all related control devices CBI) to (BN) The system has the disadvantage of lacking flexibility, as the destination address must be changed.

This invention was made with the above points in mind,
A control device is connected to each of the plurality of transmission devices, and each of the transmission devices is connected in a loop via a transmission path, and arbitrary! From η control devices, each other n
In the 171-n transmission method of a loop type information transmission device that transmits the same real information to each control device, screening information that uniquely distinguishes all the real information individually is formed, and the information is output from each of the control devices. Selection information of the real information is added to the real information, and each of the transmission devices once receives each piece of information flowing through the transmission path, checks the screening information individually, and selects only the necessary real information for the control device of its own station. This is an m-n transmission method for a loop type information transmission device, which is equipped with a selection function for loading and is characterized in that the same real information is loaded into each of n control devices.

Therefore, the real information flowing on the transmission path is not managed by the destination address and the source address, but by the sorting information that uniquely distinguishes the real information, so each control device sorts it into real information. All you need to do is add the information and output it to the transmission line, and there is no need to consider the receiving side at all.Therefore, even when adding or reducing control equipment or modifying functions, there is no need to change the information. It is possible to obtain a highly flexible system that can sufficiently handle the data without the need for The screening function selects each piece of information, and only the necessary actual information is captured and transferred to the relevant control device, so when the sending side sends the actual information once, the same actual information is simultaneously received by n control devices. This not only significantly increases the effective information transmission speed compared to the past, but also increases the processing speed of the control device. Since only the actual information needs to be processed, the functionality can be improved and a highly efficient and efficient system can be obtained.

Next, this invention will be described in Section 3, which shows one embodiment of the invention.
This will be explained in detail with reference to the drawings and FIG. 1.

Figure 3 shows the structure of the information frame output from each control device (B + ) to (13N) to the transmission path (C), and between each control device f', B1) to (BN). When receiving and receiving, sorting information that distinguishes and specifies the actual information is added to the actual information that is passed. This selection information is obtained by restoring all the actual information handled by the system when designing the information transmission system.
It is formed by individually assigning numbers such as passing through and NO to all actual information without considering the system conditions, such as the destination, etc. Of course, this sorting information uniquely distinguishes all actual information. It's fine if you can, so I'll pass it on.
It doesn't have to be, and it doesn't have to be redundantly allocated.

Moreover, what is shown in FIG. 4 is each transmission device (AI) to (A
It is a selection circuit provided in each of the transmission lines (C
) has the function of once importing all the information flowing through the station, checking the selected information individually, and importing only the actual information necessary for the control devices (old) to (BN) of the own station. That is, in the same figure, (1) is a latch circuit that extracts and latches selection information from the information frames taken in by the transmission devices (AI) to (AN).
) to (AN), when a microcomputer is used for the CPU, the rising edge of the CPU's write signal (WJ<ITE) becomes the selection information latch signal of the latch circuit (1). (2) is a sorting memory that stores sorting information for each piece of real information required by the control devices (B1) to (B N ) connected to the own station among all the real information handled by the system, and includes pRoM, etc. Sorting information is written in advance in the non-volatile memory.

(3) is a scan circuit that generates an address for the sorting memory (2), and the fall of the write signal becomes a scan start signal, and this signal causes the scan circuit (3) to
starts scanning and sequentially outputs the addresses of the sorting memory (2), and the sorting memory (2) sequentially outputs all information in the memory area according to the scan address. (4) is a comparison circuit that compares the received selection information of the latch circuit (1) with the stored selection information sequentially output from the selection memory (2) and detects a match. This coincidence signal becomes a scan stop signal to the scan circuit (3), and the corresponding transmission device (AI) to (AN
) The actual information captured in the own station's control device (B1) ~ (
This is a necessary information signal indicating that the information is actual information necessary for B N ). Furthermore, when the address scan in the scan circuit (3) is completed for all memory areas of the sorting memory (2), a scan end signal of natural stop is output from the scan circuit (3), and the captured actual information is automatically This becomes an unnecessary information signal indicating that the actual information is unnecessary to the station.

Next, the operation of the embodiment will be explained.

First, when transmitting the same real information from, for example, the control device (B1) of the first station among arbitrary m control devices, to other arbitrary control devices (B2) to (Bn++), Selection information is added to the actual information, and the information frame shown in FIG. 3 is output from the transmission device (AI) to the transmission path (C). This selection information is stored in each transmission device (A2
) to (An+I) are respectively written in the selection memory (2) of the selection circuit.

The information sent onto the transmission path (C) passes through each of the other transmission devices (A2) to (AN) in turn, goes around the loop, and disappears at the source transmission device (A1).

On the other hand, at each station other than the transmission source, each transmission device (A
2) - (AN') take in all the information flowing on the transmission path (C) at a glance, and the above-mentioned screening circuit selects the actual information. That is, out of the information 71 norms once captured, the sorting information h is placed on the data bus, and the sorting information on the data bus is latched into the latch circuit (1) by the rise of the write signal from CPtJ, that is, the sorting information latch signal. Furthermore, a scan circuit (3) is driven by a scan start signal at the end of this write signal, and outputs scan addresses in order. Therefore, in the sorting memory (2), information in all memory areas is called out in the order according to the scan address, and in the comparison circuit (4), the received sorting information of the latch circuit (1) and the information in the sorting memory (2) are outputted in order. The stored memory sorting information that comes next is compared sequentially, and a match is detected.

By the way, each transmission device ('A2) to ('A2) of the 2nd to n+1 stations
Since the same sorting information as the reception sorting information described in 1) II is stored in the sorting memory (2) of each sorting circuit of An+I), each of the corresponding transmission devices (A2) to (A11'1)
), a matching signal is output from the comparison circuit (4) of the first selection circuit, and this becomes a scan stop signal to stop the scanning of the scan circuit (3), and is also sent to CI)U as a necessary information signal. The actual information that has been input and is currently being taken in is determined to be information necessary for the own station, and the actual information is transferred to the control devices (B2) to (Bn++). Furthermore, in the transmission devices (An+2) to (AN) other than the above, since the same sorting information as the reception sorting information is not written in the sorting memory (2) of the sorting circuit, the comparing circuit has the sorting memory (2). ), no match is detected for the selection information of all the memory areas, so a scan end signal of natural stop is output from the scan circuit (3), this is input to the CPU as an unnecessary information signal, and the currently captured actual The information is determined to be unnecessary for the own station, and the actual information is discarded. In this way, the same real information is provided for n control devices (B 2 ) to (Bn++)
The uke will be handed over to each.

Therefore, the effects described above can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a general loop information transmission system, FIG. 2 is a configuration diagram of an information frame in the m-n transmission method of a conventional loop information transmission device, and FIG. 3 and subsequent drawings are a block diagram of a loop according to the present invention. Fig. 3 is a configuration diagram of an information frame;
The figure is a block diagram of the selection circuit. (A1) ~ (AN)・Transmission equipment, (old) ~ (BN)
Control device, (C) Transmission line. Attorney Ryuta Fujita Section 1 Figure 2 Figure 3 Figure 4 Figure U δ passing seconds + a eaves L
Wright's 5 Procedural Amendments) November 11, 1975 Fui I'i 艮 'au) M-N Transmission Method 3 of Masterpiece Loop Information Transmission Device Invented by 2 ni'' Ox (□1 and θ) Seki (``Special 1.'I
Output 1;, jIj Personnel address 47, Isatsu Takaune-cho, Ukyo-ku, Kyoto City @Place name (394) 1 Semi [
Kameiso 1 non-formal company representative Mt.
Masaru Waki Masaru 4th generation Yato 530 5 1 sun on the day of the 6th year of the 6th year of the 6th year of the 6th year of the 6th year of the 6th year of the 6th year of the 6th year of the 6th year of the 6th year of the 6th year of the 19th century. −

Claims (1)

[Claims] ■ A control device is connected to each of the plurality of transmission devices, and each of the transmission devices is connected in a loop via a transmission path, so that each of the m control devices can control any other n control devices. In the m-n transmission method of a loop type information transmission device that transmits the same real information to multiple devices, screening information that uniquely distinguishes all the real information individually is formed, and the information corresponding to the real information output from each of the control devices is formed. A sorting function is provided in which sorting information of real information is added, and each of the transmission devices once receives each piece of information flowing through the transmission path, checks the sorted information individually, and captures only the necessary real information of the control device of the own station. 1. An m-n transmission method for a loop type information transmission device, characterized in that the same real information is input into each of n control devices.