JPS5910052A - Loop type information transmitting method - Google Patents

Abstract

PURPOSE:To obtain a system of high flexibility, by discriminating unconditionally all pieces of real information flowing to a transmission line in response to each selection information and facilitating easy countermeasures to the addition or reduction of transmitting devices, the modification of functions, etc. CONSTITUTION:The selection information is added to an information frame to discriminate and designate the real informations which are transferred among controllers B1-BN. When the real information is transferred between optional ones of controllers B1-BN, the controller, e.g., the controller B1 adds the selection information to the real information to form an information frame. This information frame is delivered to a transmission line C from a transmitting device A1. While other transmitting devices A2-AN fetch all pieces of information flowing through the line C and transmit them to the controllers B2-BN. These controllers perform processings with reference to the selection information of each information frame. That is, a station decides whether the real information is necessary to its own station from the selection information and then carries out processing. In this case, the real information is disused if it is not needed.

Description

[Detailed Description of the Invention] The present invention relates to a loop information transmission method, in which all the actual information flowing on a transmission path can be uniquely distinguished by each sorting information, and the number of transmission devices is added or reduced, or the function is modified. The purpose of this invention is to easily deal with such problems and to obtain a highly flexible system.

Generally, a loop information transmission system has N transmission devices (A+
) to (AN) respectively control devices (B+) to (BN)
are connected, and each transmission device (A+) to (AN
) are connected in a loop via transmission path 0, and between arbitrary transmission devices (A+) and (AN) (control device (B1) to (BN
) The actual information is received and passed between ().

By the way, in the conventional information transmission system of this kind, from arbitrary control devices (B+) to (BN) to transmission devices (A+) to
The information frame output to the transmission path (Q) via (AN) is configured as shown in Figure 2, and the destination address indicating the destination and the source address that sends the information to transmission path The actual information is passed using the destination address and source address as keys.

Here, the frame synchronization word indicates the beginning of the information frame, the CRC indicates a cyclic code check, and the frame end word indicates the end of the information frame. In addition, all transmission devices other than the source (A
1) When transmitting the same real information to (AN), a circular address is added instead of the destination address.

However, according to the conventional information transmission method, from one control device, for example (B1) to a plurality of other control devices (B2),
When transmitting various kinds of real information to ~(BN), each control device (B+) to (B
N) are in a tightly coupled state.

Therefore, when adding a new control device, disconnecting any control device (B1) to (BN), or modifying the function, all related control devices (B1) to (BN, ), it is necessary to change the destination address, and the system has the disadvantage of lacking flexibility. In addition, each piece of information flowing on the transmission path (q) is classified only by the combination of destination address and source address, and all information cannot be specified uniquely, so it is necessary to perform system depacking, troubleshooting, etc. This is extremely inconvenient when monitoring all the information on the transmission path Ω or outputting a simulation of all the information.

This invention has been made with the above points in mind,
Connect multiple transmission devices in a loop via a transmission line,
In a loop information transmission method in which real information is received and passed between arbitrary transmission devices, screening information that uniquely distinguishes all the real information individually is formed, and the real information output from each of the above-mentioned transmission devices is This is a loop information transmission method characterized by adding selection information of the actual information.

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 transmission device It is only necessary to add the ``I'' and output it to the transmission path, and there is no need to consider the receiving side at all. Therefore, when adding a new transmission device, disconnecting an existing transmission device, or changing the function Even if the system is modified, there is no need to make any changes, and it is possible to obtain a highly flexible system that can fully handle the situation.Furthermore, as mentioned above, it is possible to select all the actual information flowing on the transmission path. Since information can be uniquely specified, it is very convenient for system debugging, troubleshooting, etc. (also in this case, it is easy to monitor all the real information flowing on the transmission path, to simulate output of all the real information, etc.) It is something.

Next, the present invention will be explained with reference to FIG. 3 showing one embodiment thereof and FIG. 1 mentioned above.

FIG. 3 shows the structure of the information frame output from each transmission device (A1) to (AN:), and each control device (13+)
The receiver distinguishes the real information from the real information passed between ~(BN').

The specified screening information is added. This screening information is
When designing an information transmission system, it is created by restoring all the real information handled by the system and assigning threads 716 etc. to all the real information individually without considering the system conditions, such as the destination. Of course, this sorting information only needs to be able to uniquely distinguish all the real information, so it does not have to be a door, and it does not have to be assigned redundantly.

Then, the actual information is sent to any control device (13+) to (BN).
A control device that transmits information when transferring between
For example, (B)) adds screening information to real information to form an information frame, and sends the information frame to the transmission device (A1).
outputs to the transmission line (q.
) ~ CAN) respectively captures all the information flowing on the transmission path (0) and sends it to the control device (B2) ~ (BN) side, and each control device (B2) ~ (BN) Perform predetermined processing by referring to the selection information of the information frame.In other words, use the selection information to determine whether or not the actual information in question is necessary for your station, and if necessary, perform processing based on the actual information, and if unnecessary, perform the processing based on the actual information. Throw away the actual information.

Therefore, all the real information received and passed between each control device (Bl″r-(BN)) is not managed by the destination address and the source address, but is uniquely distinguished individually. Because it can be managed using a completely new concept of sorting information, it is possible to obtain the effects mentioned above.
It can eliminate all the drawbacks of the conventional method.

[Brief explanation of drawings]

Figure 1 (a block diagram of a general loop information transmission system), Figures 2 and 3 each show a configuration diagram of an information frame in a loop information transmission method, Figure 2 is a conventional example, and Figure 3 is a block diagram of a general loop information transmission system. This is an embodiment of the present invention. (/\1)~CA,N) Transmission device, (C) Transmission line. Agent: Patent Attorney Ryuta Fujita Figure 1 Figure 2 Figure 3 = 241

Claims (1)

[Claims] ■ In a loop information transmission method in which multiple transmission devices are connected in a loop via a transmission path and real information is received and passed between arbitrary transmission devices, all real information can be uniquely distinguished individually. A loop information transmission method characterized by forming screening information and adding screening information of the real information to the real information output from each of the transmission devices.