DE2750757B2 - Device for identifying identically identical information in the case of a branched flow of information - Google Patents

Description

The invention relates to a device for identifying identical items of information branched flow of information.

The device according to the invention can be used in the field of information processing and process computer technology.

As a possibility of process control by means of a process computer, the double computer system is generally known; h, the use of two calculators for Running a process. The two computers can be used in the "Master - on line" / SIave-stand-by "configuration. The flow of information branches between the individual information source, for example a measuring transducer, and d * η information receivers, for example the two computers so yourself. From the branching point onwards, the same information goes in different ways further processed by various bodies, the flow of information for processing becomes temporary removed and then passed on.

For the purpose of a completeness check, the information should be returned at the end of the processing sequence be merged. Because of the ramifications and the different stays during the processing phase, one occurs until the identical information comes together time delay, a gear difference.

During the completeness check and in the event of a computer failure, this can result in time Postponements, disadvantageous information and processing gaps occur.

If the "master" in charge of the process fails, and the "slave" computer is to continue the process, a disadvantageous loss of information can occur as a result that the failed computer "master" is no longer able to transfer the information last received to the Communicate to the »slave« computer. The “slave” computer, for its part, cannot judge which of the previous ones information received directly is new after the last state of knowledge of the "Master" computer at which point the process is to be continued.

The invention is based on the object of developing a device by means of which an identification of identically identical items of information has taken place Branching of the information flow is made possible, with the information to be identified for Comparison / citpunkt have a gear difference can.

According to the invention, this object is achieved in that information is transmitted between one Information source and a branch point in the course of the information flow an identifier is arranged, which provides the information arriving from the information source with an identification code In a further embodiment of the invention are / .m course

of the flow of information, one information receiver with a control member directly and another information receiver with this control member via one Coupling link connected. The advantages that can be achieved with the invention exist in particular in the fact that each marked information signal of an information flow becomes indispensable and can therefore be identified at every point in the information processing process. Furthermore, the message content itself can also to be checked. In particular, branched, identically identical information signals can be time-delayed occur, are recognized as identical.

It can be determined at a given point in time how far the company is from an information source The information given has already been processed in the various information recipients. Of the sequential (time-sequential) flow of information can be controlled. Furthermore, the Level of knowledge of each recipient of information

to be checked. Finally there is a final examination the completeness of the information transfer and processing.

An embodiment of the invention is explained below with reference to the drawing The drawing shows a dual computer system as it can be used for process control. Two Information receiver computers 1 and 2 are fed with signals from an information source 3. Of the The information nut branches out at the branch vation point 4. For the identification number the signals pass through the identifier 5.

In the embodiment it is assumed that the Information receiver 1 as a computer "master" in on-line operation and the information receiver 2 as

* 5 “Slave” computers function in stand-by mode. Of the The information receiver 1 is connected on the output side to a control element 7 via a coupling element 6. The control element 7 also has the output value of the information receiver 2 on the input side.

The information coming from the information source 3 is indicated in the identifier 5 with a Identification mark, comparable to a profile or an identification card. This will every information signal is unmistakable and at all times identifiable.

Both information receivers 1 and 2 are separated via the branching point 4, the same Information offered. While the information recipient computer 1 considers the "binding" processed recognized information and this via the coupling member 6 and the control member 7 to the Information receiver computer 2 as well as for this binding for "taking notes" passes on receives the computer 2 in turn also directly via the branch point 4 identically and the same information, but as "non-binding" and subordinate.

If the computer 1 fails, the computer 2 with the binding level of knowledge of computer 1, which it

has been transmitted so far, continue the process independently, giving him the after taking over the process Information which was previously referred to as non-binding information transmitted directly via the branch point 5 now used as binding

In order not to lose any information in the period of the process transfer, the computer 2 compares the Identification code of the last one from the computer 1 binding information received with the identification number the last information received directly and without obligation. From this, the computer recognizes 2, with which information the process interrupted by the failure of the computer 1 can be continued got to. As a result, no information for the process management is lost.

The switching time for switching the process control from computer 1 to computer 2 can be optimized independently of the information transfer from computer 1 to computer 2 and only according to the requirements of the process control.
In the considered embodiment of a double

computer system - computer 1 in on-line operation, Computer 2 in stand-by mode - it is also possible for computer 2 to control the process Computer 1 with regard to completeness and correctness of the information flow continuously by means of the control element

des 7 checked. Through ongoing identity checks and control of the message content of the binding information received from the computer 1 with the on information received as non-binding directly via branch point 4 is provided by means of of the control member 7, the level of knowledge of the computer 1 is monitored.

1 sheet of drawings

Claims (1)

Patent claims: l. Device for identifying identically identical information in a branched flow of information, characterized in that an identifier (5) is arranged between an information source (3) which transmits information and a branch point (4) in the course of the flow of information Information source (3) provides incoming information with an identification code Z device according to claim 1, characterized in that in the course of the flow of information a Information receiver (2) with a control member (7) directly and another information receiver (!) is connected to this control element (7) via a coupling element (6).