SU1608724A1 - Device for exchange of discrete information - Google Patents

Abstract

The invention relates to computing and can be used in systems for collecting and processing information. The aim of the invention is to simplify the device. The device contains interface highways 1, 12, blocks 2, 8 of duplex information transmission, selectors 3, 9 of pulse duration, receivers 4, 6, transmitters 5, 7 and communication channels 10, 11. The device allows remote objects to be connected to each other. It is not required for its work to receive externally program commands. 2 Il.

Description

ig. one

The invention relates to computing and telemechanics and can be used in systems for collecting and processing information and in devices for distributed objects.

The aim of the invention is to simplify the device.

Figure 1 shows the functional diagram of the device; Fig. 2 is a functional diagram of a pulse width selector controlling the change in the logical state of the lines of the interface highway.

The device contains (FIG. 1) the first ing of the interface line 1, the first n blocks of 2 duplex information, the first selector 3 of the pulse duration, the first receiver 4, the first transmitter 5, the second receiver 6, the second transmitter 7, the second n blocks 8 of duplex information , the second selector 9 pulse duration, the first 10 and second 11 simplex communication channels and the second interface trunk 12.

The pulse width selector (figure 2) consists of n pulse shapers 13 (PI) with a common IDN-NE output element, an input pulse expansion element 14, a time delay element 15 for the output signal to disappear, and an inverter 16. The signal from the output of the OR element - NOT FORMERS 13 pulses are fed to the output of the selector through sequentially connected elements 14-16. The parameters of elements 14 and 15 are chosen in such a way that the duration of the output signal of the prohibition ta at the output of the selector in case of a one-time change in the state of the interface line corresponds to the value

t3 2tc + t30,

where tc is the maximum estimated time to establish a state on the interface highway during an object response;

t30 is the maximum estimated time from request to response when information is exchanged between two objects connected to one interface trunk.

This choice of the t3 value makes it possible to ensure the presence of a inhibiting signal at the output of the selector 3 (9) during the entire process of information exchange between two objects connected to one interface trunk.

The device works as follows.

In the initial state, the first 1 and second 12 interface lines present a high (inactive) signal level. When the state of the lines changes

on the first interface highway 1 initiated by the object connected to it, information about this is received by a parallel code for information

the inputs of transmitter 5 through duplex information transmission units 2, which bi-directionally generate signals for receiving and transmitting data. Transmitter 5 converts the incoming to

0 its information inputs are a parallel code of the transmitted information in the serial, supplements the latter, if necessary, with elements for error protection, coordinates the signal of the generated code combination with the communication channel and transmits it to the communication channel 10.

The code combination signal, having passed through the communication channel, arrives at the receiver 6, from the output of which information is sent by a parallel code to the second interface trunk through blocks 8. The process of passing information from the second 12 to the first 1 interface trunk is carried out in a similar way. At the same time,

5, the first 1 (second 12) trunk of information is not transmitted to the second 12 (first 1) trunk due to blocks 2 (8) of the duplex information transmission. Selector 3 (9) controls the mode of arrival of information to the transmitter input, prohibiting it to read information from the outputs of blocks 2 (8) when the state of the interface trunk changes and the exchange of information between two objects connected to one of the interface highways. To this end, the inhibit signal at the output of the selector 3 (9) appears on any change in the state of the interface trunk and is present at the indicated

0 above condition.

The device allows you to connect remote objects that use a bit-parallel, byte-to-serial asynchronous, coordinated way.

5 information exchange, located at any distance from each other.

The device allows you to connect remote objects with each other, while maintaining the ability of a standard system

0 connecting several objects to the interface line in one point, as well as using it in telecontrol systems and remote signaling systems. The device does not require, for its work, to receive from outside or from

Claims (1)

5 connected command program object. . DETAILED DESCRIPTION OF THE INVENTION A device for exchanging discrete information comprising a first interface trunk, a first transmitter. WITH den roy nose blo out qi The first receiver and the first simplex communication channel, characterized in that, in order to simplify the device, a second trunk, a second transmitter, a second receiver, a second simplex communication channel are inserted in the second and first duplex transmission units information, the first and second selectors of length and pulses, the inputs-outputs of the first joint duplex information are connected to the same lines of the first interface trunk, the outputs of the first duplex transmission blocks are connected to the information inputs of the first the transmitter and the like inputs of the first selector of the pulse duration, the output of which is connected to the control input of the first south transmitter, the output of which is connected to the first simplex channel of the zi, the inputs n of the first duplex information transmission units are connected to the same outputs of the first receiver, whose input is connected to the second simplex communication channel, the inputs / outputs of the second duplex information transmission blocks are connected to the same lines of the second interface trunk, the outputs of the second duplex transmission blocks information are connected to the same information inputs of the second transmitter and the same inputs of the second selector of the pulse duration, the output of which is connected to the control input of the second the transmitter, the output of which is connected to the second simplex communication channel, the inputs n of the second duplex information transmission units are connected to the same output of the second receiver, the input of which is connected to the first simplex communication channel. Gd FI-1 P P ffCHFI-P 15 Output FIG. 2