SU1383361A1 - Device for checking logical block - Google Patents

Abstract

The invention relates to automation, computing and communication. The purpose of the invention is to increase the reliability of control and speed by detecting failures in the mechanism of the punched tape. The goal is achieved by introducing a delay element 13, elements AND 12, OR 14, trigger 15, which allow the driver 7 to be reversed and to make an additional comparison for detecting failures of the stretching mechanism. In case of detection of a failure of the device, the device starts automatically, thereby preventing the shutdown and increasing the speed of the control. 1 3. Clause f-ly, 1 ill.

Description

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The invention relates to automation, computing and communication.

The purpose of the invention is to increase the reliability of control and speed.

The drawing shows a diagram of the device.

The device contains a control unit 1, a pulse generator 2, an AND 3 element, a pulse shaper 4, a delay element 5, a monitored block 6, a reference signal shaper 7, an error recording block 8, a comparison circuit 9, a prohibition element 10, an error trigger 11, element 12, delay element 13, element OR 14, error trigger 15.

The device works in the following way.

A monitored block (transmitter) 6 is connected to the inputs and outputs of the device, in which punched tape with perforation is loaded, the information of which is identical to the information provided by the shaper 7 of the reference signals.

The pulses from the generator 2 through the open element And 3 arrive at the input of the element 10 prohibition, in which the results of the comparison of the signals from block 6 and the generator 7 of the reference signals are polled. After the end of the polling, pulse generator 4 is started through delay element 5, which ensures block 6 to read the next line of punched tape, and reference signal generator 7, which goes to the next state.

If the block b is healthy, the comparison result in scheme 9 is positive. In this case, the prohibition element 10 is closed, the trigger 11 is in the initial state, the signal from its output maintains the open state of the element I 3, allowing the passage of the next trigger pulses.

If the signals from block 6 are different from the signals from shaper 7, the comparison result in circuit 9 is negative, the prohibition element 10 opens and transmits a polling pulse that triggers trigger 11, after which a failure mechanism is detected.

The failure of the pulling mechanism causes the previous line of punched tape to remain in the reading unit of block 6, while the former 7 goes to the next state. Therefore, in order to detect the failing of the draw, it is necessary to return the driver 7 to the previous state and to make an additional comparison of the signals from the monitored block 6 and the driver of the reference signals, which should give a positive result in the case of a failed draw.

The error signal from the output of the prohibition element 10 is fed to the reversing input of the driver 7, which in this case returns to the previous state (driver 7 can be performed, for example.

based on the counter operating in addition and subtraction mode).

In addition, the error signal through the delay element 13 (at the time of reversing the generator 7) is fed to the input of the element 12, in which the result of the additional comparison with the previous state of the generator 7 is polled. If the result of the additional comparison is positive (a failure occurs) , a polling pulse from the output of the delay element 13 through the open element AND 12 triggers the trigger 15, which detects a failed error, and through the element OR 14 resets the trigger 11, which opens the element And 3, allowing further control of the trans Smitter - block 6.

If the result of the additional comparison is negative, the polling pulse through the closed element 12 does not pass, the trigger 15 remains in the initial state, the trigger 11 is not reset, holding the closed element 3 and forbid checking the transmitter until the causes of the read error are eliminated.

Claims (2)

1. A device for controlling a logic unit, comprising a control unit, a reference signal generator and an error recording unit, the first output of the control unit being the output of the device for connecting to the synchronized input of the monitored unit, and the second and third outputs are connected to the input of the reference signal generator and the enable input of the error register block, the first group of information inputs of which is a group of device inputs for connection to the outputs of the monitored block, and the second The Upp of the information inputs is connected to the group of inputs of the reference signal generator, the output of the error register’s error block is connected to the enable input of the control unit, characterized in that, in order to increase the control accuracy and speed, it contains the element AND, the element OR, delay element and trigger 5 errors, and the error recording block contains a comparison circuit, a prohibition element and a trigger for the absence of an error; prohibit element and zero output of the trigger for no error, the output of the comparison circuit is connected to the second e input of the prohibition element and the first input of the AND element, the second input of which is connected to the output of the delay element, and the output is connected to the first input of the OR element and the single input of the error trigger, zero 3 13833614 the input of which is the second input of the element OR pulses, the element AND, the element of delay combined and are the reset input of the device and the pulse shaper, and the output the output of the prohibition element is connected to the pulse generator connected to the first with a single input trigger no input element And, the second input of which error, the input of the delay element and input 5 is the block enable input, and the return of the reference signal-stroke generator is the third output of the block, and through the cell, the output of the OR element is connected to the delay input connected to the input of the trigger reset no error. output 2. The apparatus of claim 1, wherein the delay elements are respectively that the control unit contains the generator of the first and second outputs of the block.