SU1441374A1 - Information output device - Google Patents

Abstract

The invention is compatible with computing and can be used in various control systems as part of devices for outputting command information. The purpose of the invention is to increase the reliability of the device in the event of a malfunction of the control computer by additional blocking of the information output. The device for outputting information contains depxfrator 1, triggers 3.12 and 13, register 7, elements AND 5.9 and 14, a single vibrator 10, and element OR P. 1 l.

Description

The invention relates to computing and can be used in various control systems as part of devices for outputting command information.

The purpose of the invention is to increase the reliability of the device.

The drawing shows a functional diagram of the device for the output of information.

The drawing shows the decoder I, the inputs 2 of the device data addresses, the first trigger 3, the synchronization input 4 of the device, the second element 5, the control input 6 the device's output, the register 7, the device 8 input 8, the first element 9, the single-oscillator 10 , element OR 11, second trigger 12, third trigger 13, third element AND 14.

The device works as follows.

In the initial state (the device is not selected) the outputs of the decoder 1, the element And 9 are in the state O, the inverse output of the one-vibrator 10 is in the state 1. This Level through the element OR 1I is fed to the R input of the register 7, maintaining it - moves in the zero state, and on the R input of the third trigger 13, on the output of which, therefore, O is set, which locks the second element And 5, blocking the passage of the V signal from the control input 6 through it. To output the information of the control The computer must be pre-installed the third trigger 13 to state 1. For this, the control computer sets the address of the third trigger 13 to inputs 2, and the second output of the decoder 1 shows the active level D. According to the forward (positive) synchronization signal from the input 4 at the output of the element AND 9, an active level 1 appears, which causes the one-shot 10 to start, the output of which during the time T is set to the level O, resulting in the absence (O) of a reset signal from the input 8 at the output of the element OR I1 is set Oh, which allows the work of the register 7 and three the second trigger 13 does not change the state of their outputs, the output of the second trigger 12 is set to level 1, which is transmitted to the first input

five

,

50

0 5 0 s Q j

the third element And 14. Then the control computer exposes data to inputs 2, (in this case it doesn’t matter what), which in no way changes the state of the device. The Output command given from control input 6 opens the third element AND 14, at the output of which a level 1 is set, which puts the output of the third trigger 13 into the enabling state (level 1).

The control computer sequentially removes the command Output from control input 6, the synchronization signal from input 4, and data from inputs 2. Thus, the allowing level I is set at the third input of element 5 and the device is ready to receive and transmit information to external device, for which the control computer sets the address of register 7 to inputs 2 for a time T Tr, the second output of the decoder 1 goes to the state O, and the first output sets the active level 1. The synchronization signal at the output of the second trigger 12 level O is set, and the output of the first trigger 3 is level 1, which is fed to the first input of the second element AND 5. The control computer sets data 2 to be output to inputs 2 and to command 6 an output command that opens the second element 5 at the output of which an active level 1 appears, which is transmitted to the C input of register 7, causing a record of data sent from inputs 2 to the information inputs of register 7. At the outputs of register 7, information is set to be output. Computer control removes the command Output. At the same time, at the C-input of the register 7 and the C-input of the third flip-flop 13, the O levels are set. At the moment of transition of the level 1 at the C-input of the third flip-flop 13 to the state O, the level O is transmitted from the information input of the third flip-flop 13 to its output whereby a level O is set at the third input of the second element And 5, which blocks the device for output. Then the control computer removes the synchronization signal from input 4 and the data from inputs 2. The information output cycle is over, and the device is in the initial state behind the test.

By ensuring that the output of the single-vibrator 10, the R input of the register 7 is kept for a time Tp level O and the output of the register 7 continues to store the recorded information.

To save or change the state of the recorded information of the computer control over a period of time, it is necessary to carry out the described information output cycle. In this case, the one-oscillator 10 is restarted and at its output the level O is maintained during the time Tp from the moment of the bypass. If during the time T p the control computer does not repeat the cycle to output information, then after time Tp, from the moment of restarting, the output of the one-vibrator 10 goes to state 1, which leads to resetting of the outputs of register 7 and the device to its initial state.

If the control computer has installed the third trigger 13, but during the time Tp has not completed the information output cycle, the output of the one-shot 10 also goes to state 1, which leads to resetting the register 7, the third trigger 13 and the device to its initial state. Passing active level 1 through input 8 causes the device to return to the initial state.

The time period 1p is chosen by the developer taking into account the speed of the control computer and the process being serviced.

Claims (1)

Invention Formula A device for outputting information containing the decoder, the first trigger, the first and second elements AND, the one-shot, the element OR, the register whose outputs are the outputs of the device, the inputs of the decoder and the information inputs of the register are inputs of the device data address, the information input of the trigger is connected to the first output the decoder, the strobuctions, the input of the first trigger and the first input of the first element I are the synchronization input of the device, the output of the trigger is connected to the first input of the second element I, the second input of which is Ipor o is the control input of the device, the output of the second element I is connected to the gate input of the register, the output of the first element I is connected to the input of the one-vibrator, the output of which is connected to the reset input of the register, the second input of the element OR is the reset input of the device, characterized in that In order to increase the reliability of the device, the second and third triggers are entered into it, the third element is AND, the second output of the decoder is connected to the second input of the first element AND and the information input of the second trigger, and the gate input of the second trigger combined with the first input of the first element And, the output of the second trigger is connected to the first input of the third element And, the second input of which is combined with the second input of the second element And, output The third element I is connected to the input of the installation of 1 of the third trigger, the output of which is connected to the third input of the second element I, the output of which is connected to the gate input of the third trigger, whose information input is connected to the zero potential bus of the device, a. reset input combined with register reset input.