JPS58142651A - Multiplex information transmitter - Google Patents

Abstract

PURPOSE:To minimize the traffic volume of series multiplexing signals, by automatically transmitting signals being changed preferentially to the other signals among information inputted in parallel from plural information signal sources. CONSTITUTION:Signal sources 1(1A...1N) output signals 2(2A...2N) to transmitting circuits 3(3A...3N). The transmitting circuits 3 produce series information signals 4(4A...4N) having fixed lengths from the signals 2 and output them to a multiplex information transmitter 5. The multiplex information transmitter 5 always collates the transmitted signals 4(4A...4N) with information taken into the transmitter 5 at the previous time whether they coincide with each other or not, and transmits the signals 4 after they are converted into series information signals 6 having fixed lengths to a post device 7 in a fixed transmitting order when they coincide with each other, or preferentially to the other signals when they do not coincide with each other. The series information signal 6 consists of a synchronizing signal part, an address signal part, and an information signal part.

Description

[Detailed description of the invention]

The present invention provides an information transmission device that serially multiplexes a plurality of pieces of parallel information that change independently or simultaneously and transmits the serially multiplexed information to a long distance.
The present invention relates to an information transmission device that transmits changing information while minimizing traffic sensitivity. In transmission equipment that transmits a large amount of information generated within a plant to, for example, a central control room, changing information is transmitted with priority over constant information that is not changing.

[-, it is desirable to increase the transmission capacity of the entire system economically. However, in the conventional in-plant information transmission system,
Since variable information and constant information were transmitted at the same frequency, or conversely, only Hg information was transmitted when variable information existed, it was difficult to minimize the traffic allocation for all information. did not become. The purpose of the present invention is to constantly monitor whether or not a changing information signal exists, and when changing information does not exist, all the information is sent in a certain order and period, and when it does exist, changing information is prioritized. The present invention is directed to providing an information transmission device which performs serial VC transmission to a host device while minimizing the traffic of all information signals. The previous value and current value of the input information signal are successively compared, and when a discrepancy occurs, that is, when the information is changing, the information is given priority over other constant information and the information is changing. The feature is that information signals are transmitted in an l1ljl order that minimizes the amount of traffic for all signals. The above seven embodiments of the present invention will be described in detail using the drawings. FIG. 1 shows one embodiment of the invention. In the same figure,
Signal source 1 (IA, . . . , IN) supplies signal 2 (2A, . . .
..., 2N> Output to all transmission circuits 3 (3A, .... 3N). The transmission circuit 3Vi creates a serial information signal 4 (4A, . . . 4N)ffi of a fixed length from the signal 2 as shown in FIG. 2, and outputs it to the multiplex information transmission device 5. The multiplex/1H information transmission device 5 receives each transmitted signal 4 (4
A, ..., 4N) is constantly checked to see if it is the same as the previously imported information. The signal is converted into a fixed length serial information signal 6 as shown in FIG. 3 and transmitted to the host device 7 with priority over other information signals. The serial information signal 6 is composed of a synchronization signal section, an address signal section, and an information signal section. Next, regarding the multiplex information transmission device 5 which is the center of the present invention,
No. 41〆1. Further details using Figures 5 and 6.
Explain/do. Output power of comparator 10 when E @ l I+, 'i':
It is taken into the storage register 8 by the load pulse signal 4' outputted from 'i4' at a constant period (however,
The information already stored in the storage register 8 is shifted to the shift register 9 immediately before the Wr information is taken in.)
. Further, the comparator 10 checks whether the contents of the storage register 8 and the contents of the shift register 9 are the same or not, and outputs a signal "1" if they do not match. In this way, the signal 4 is automatically taken into the storage 1 register 8 only when there is a change. Transmission order determination circuit 1
．． 3i4, the output state 11 of each comparator 1o is stored in the memory section (
IIA, . . . , 11N) are stored in a memory in correspondence with the address of each signal source. Controlled by timer 14 fa4
The one data transmission time T (FIG. 6) of the serial information signal 6 to be transmitted is set in advance according to the requirements of the two systems. The transmission order determination circuit 13 inputs all the pulse signals 14' with a period T from the timer 14 and uses a comparator stored in a memory section to determine whether each signal 4 is changing according to a predetermined order. Judgment is made based on the output status of 10. and,
A scanning instruction unit that controls the scanning unit 17 for a period of nXT (an integer of n>1) if it is determined to be changing, and for a period of mXT (an integer of n) if it is determined to be constant. The state (“1” or “0”) of the output signal 15 to the signal 16 is maintained. After the period has elapsed, the state of the signal 5 is inverted, and at the same time, the judgment point is stored in the same manner as the next memory section. The address setting transmission circuit 18 also receives tt,
Address information 13' corresponding to the memory under judgment is output. The scan instruction section 16Iri scans the scanning section 17 in an order corresponding to the determination order of the transmission order determination circuit 13. Then, while the state of the signal 15 from the transmission order determining circuit 13 is maintained, the scanning section 17 is fixed, and when the A symbol 15 is reversed, the scanning section scans the missing part. The address setting transmission circuit 18 includes the transmission 1-order determination circuit 13
Address “1F\information13” sent from and scanning unit 1
A serial information signal as shown in FIG. An example (in the case of m-1) of the transmission order of the serial information signal 6 outputted from the multiplex information transmission device 5 having the above functions is shown in FIG. However, A, B,...
, Z respectively mean all of the signals (1 theta),
C and D represent changing raw information signals, and the others represent information signals that are currently unchanged. FIG. 5 shows another embodiment of the multiplex information transmission device ft,5. Storage register 8. Shift register9. Comparator 10
, the operation of the transmitter 4' is exactly the same as in FIG. 4, and the changing signal 4 is automatically captured. The flip-flop 20 inputs a clock pulse 19 with a period T and outputs a signal 21 for determining whether to alternately transmit variable information and constant information in the transmission order of the information signal 6 to the host device [7]. do. Exclusive OR (E 011.) Gate 22i1
．． The output signal 11 of the comparator IO and the ljJ force (
Fi No. 21 is input, and during the period when the signal 21 is "()", the signal 11 is Pa 1", and when the signal 21 is changing, it is "1" for the 111 report 4.
”, the signal 11 is “0” during the period when the 1d number 21 is “1#”
, the transmission constant information 4' is outputted to the transmission address selection circuit 24. The transmission address selection circuit 24 stores the output 23 (23A) of the EO'I:L gate in the internal memory section. ,..., 23N) are stored in correspondence with all signal source addresses, and the state of the signal 23 is changed in accordance with a predetermined order until the signal "1"
At the same time as all detections, the corresponding address scan instruction section 1
6 and sends the time T to the address setting transmission circuit 18. After the time T has elapsed, all similar operations are performed in accordance with the set order. (However, if the gate output signal 23 is all 10# or all i-t "'1", that is, the information signal 4
are all constant or are all changing, the signal ``1'' is input from the priority transmission cancellation circuit 25, and the total period T of each address is set in accordance with the setting order regardless of the state of the signal 23.
Scan Jk4 yr<To 16 and address setting transmission circuit 1
Send to 8. ) The scanning instruction unit 16 outputs position information 12 corresponding to the address sent from the transmission address selection circuit 24.
(12A,..., 12N). The scanning unit is automatically fixed so as to be input to the address setting transmission circuit 18. The operation of the address setting transmission circuit 18 is similar to that of the embodiment shown in FIG. An example of the transmission order of the serial information signal 6 output from the multiplexed information transmission circuit 5 having the above-mentioned functions is shown in FIGS. 7 and 8. However, A, j (. . . , Z each take advantage of the entire signal (1 data), and in Fig. 7, C takes advantage of it, and in Fig. 8, (1 d while C and F change)
What are the features of the embodiment of the multiplexed information transmission circuit 5 of the present invention shown in FIG. 4? In one cycle of transmitting information from a signal, constant information is transmitted Iη times, whereas changing information is transmitted n times (m × n). This is probably because changing IFT information is transmitted more times than fixed information during a → time period. Also. A feature of the embodiment shown in FIG. 5 is that changing information and fixed 1i# information are always transmitted at the same time, and even in the case of mixed information, each information signal on the same transmission path Waiting for 1 hour, i.e. ]・Raraftsk 1 is minimized 1
It is easy to understand that the present invention
It is possible to dynamically transmit signals that are changing and to minimize the total signal traffic, and it is possible to transmit signals to a large number of reactors in a power reactor.
When applied to ``ft@i yarn, its industrial value is very large.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of the present invention, and FIG. 2 is a diagram showing the overall configuration of the present invention. FIG. 3 shows an example of the information signal format; FIGS. 4 and 5 are examples of the present invention; FIGS. It is an explanatory diagram showing an example of the serial transmission order. 1...1." 4 sources, 3... transmission circuit, 5... multiplex/1'η" information transmission equipment, 7... superior sender. Livestock stocking. 〒hr

Claims (1)

[Claims] 1. Means for capturing yu@ sent from a plurality of signal sources, means for determining whether the captured information matches the previously captured information, and means for multiplexing the information. , and in a transmitting unit of a multiplex information transmission apparatus having means for controlling the order of serial transmission of information, the order of transmission of information is controlled by
Monoke n (integer where n>l) whose previous value and current value do not match
2. A multiplex information transmission device characterized in that the information that matches the information is connected m (m (an integer of n) times) or is alternately transmitted. 2. According to the rate of change of information. 2. The multiplex information transmission apparatus according to claim 1, wherein n or m is controlled.