SU1624458A1 - Device for logic circuit texting - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used to control logic blocks built on the basis of integrated logic elements. The purpose of the invention is to increase the reliability of control. To this end, the device contains a control unit, a test generator, a current sensor, a subtraction unit and a unit. the indications are entered into a digital-analog converter and a block of analysis of code reactions, which is a t, very compact digital) and p5 different types of text (Gergisibrat .., i tick posoztschu, with ri -isii m comprat p 1 f-ly 3 un

Description

The invention relates to automation and computing and can be used for controlling logic blocks based on integrated logic elements.

The purpose of the invention is to increase the reliability of control

In Fig. 1, a functional diagram of the device in Fig. 2 is shown, the control unit diagram, in Fig. 3, a functional diagram of the output reaction analysis unit.

The device has (Fig. 1) an input 1 of the initial installation and contains a control block 2, a test generator 3 (memory block) a digital-to-analog converter 4 a current sensor 5, a block 6 for subtracting block 7 for output response reactions, an indication block 8, a control object 9, and also inputs 10 and 11 of control unit 2, group of address outputs 12 of unit 2, outputs 13 and 14 of unit 2 of control outputs 15 16 of generator 3, input 17 and output 18 of sensor 5, output 19

digital channel oao about pr azoetheg 4, and also input 20 block 7 analog and vycho-oix reactions 1 y grsmtv predicate t n

FOR POD (AND SIGNAL L1USK G KOHTpubt,

logical blocks

Block 2 controls it 2) trigger 21 Shmit1a three rep 22 rec-mul multivibrator 23 distributes 24 pulses and a counter 25 skr pr-is assigned to work the address signals to generator 3 (memory block) at receiving and signal input 1 and the st forming of the gating signal of the supplied F block 6, the reception of the signal from the block b in the form of a difference of signals taken from the outputs of blocks 5 and 4, etc., the received signal of a certain level of control signal generation in block 7 analysis of output reactions

A unit of amy (dough generator) oed is assigned for storing dough data for a diagnostic object as well as

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formations in discrete form about the latter’s reference responses. The input signals of the flea 3 are the signals from the address outputs 12 of block 2.

A digital-to-analog converter (D / A converter) 4 is designed to convert information and reference responses of an object 9 of a control from discrete form to analog

The current sensor 5 is designed to convert the values of the current statically consumed by the object 9 to the corresponding values of the direction of the electric current supplied to the block 6.

The subtraction unit b is for subtracting the signals of the converter 4 from the signals of the sensor 5.

The output reaction analysis unit 7 is designed to analyze the value of the signal coming from the output of block 6 versus it for a specific fault, and issue a fault code to the input of block 8. Block 7 has a control input that sends a signal to either allow or block the operation of the block .

The output reaction analysis unit 7 (FIG. 3) contains an analog-to-digital conversion 26, an RS flip-flop 27, a multivibrator 28. an estimator 29, a fixed memory 30, and a comparator 31, which has inputs 32 and 33.

The device works as follows.

The PS signal of its input 1 to the setup input of the trigger 22 of the block 2, the trigger 22 is set to one and thus disrupts the operation of the multivibrator 23. The pulses coming from the multivibrator 23 are converted by the distributor 2L in such a way that the first pulse enters the input of the counter 25, and the second pulse is gating for block 6. The third pulse is sent again to the bypass of counter 5. The fourth pulse is skybing, etc.

The group of outputs 12 of counter 25 is connected to the address input of block 3, therefore, changing the code combination at outputs 12 leads to initialization of different memory cells of block 3 and the appearance of information stored in them at outputs 15 and 16. At the same time, the information present at output 15 Is test for object 9, and the information present at output 16 contains data on the reference values of the current consumption of the object 9 for certain test effects.

Datuik 5 current converts the level of current consumed by the object 9 into an equivalent voltage level, which

is fed to the input 18 of the block 6. The input 19 of the block 6 receives the analog signal from the output of the converter 4, which converts information about the reference reactions

object 9 in the specified test actions (from discrete form to analog). Block 6 subtracts the second operand from the first operand, and the resulting difference (when a signal arrives at the gate input from output 14

0 block 2) appears at its output 11. Trigger 21 when the difference obtained exceeds a certain predetermined threshold (constant for logic devices of a single series, for example, TTL, DTL

5, etc.) is triggered and a logic signal appears at its output, which switches the trigger 22 to the opposite (zero) state, prohibiting the generation of pulses by the multivibrator 23. Turn 0, the trigger 12 of the trigger 22 transmits this signal Starting the converter 26 of block 7 A converter (A / D converter) 26 converts the information at input 11 into a discrete form and outputs an End Conversion signal.

5 switching trigger 27 in one state. The output signal from trigger 27 allows the generation of pulses by multivibrator 28, which in turn arrive at the input of the estimator 29. Counter 29, supplying code combinations to the address inputs of memory 30, controls the process of reading information on possible faults of the object 9. When the information on the inputs 32 and 33

5, the comparator 31 outputs a logic signal to the reset input of the trigger 27, switching it to the zero state, prohibiting further operation of the multivibrator 28. The process of reading information from the memory

0 30 stops, and in block 8, output 20 receives object fault code 9.

To perform further troubleshooting, you need to submit the appropriate logical signal from input 1

5 cash on the trigger setup input 22.

It should be noted that the described process of operation of the device for monitoring logical blocks occurs only when the values of the signals of the blocks

0 4 and 5. When they coincide, a sequential process of testing the object 9 and comparing the obtained values of the current consumption with the reference value occurs. When executing memory block 3 easily removable

5 it becomes possible to quickly switch to other types of diagnostic objects.

Claims (2)

Claim 1. A device for controlling logical blocks comprising a control unit, a test generator, a current sensor, a subtracting unit and a display unit, wherein the information input of the test generator is connected to the first output of the control unit; the current sensor input is the input of the device for connecting the output of the control object, and the output of the current sensor is connected to the first information input of the subtraction unit, characterized in that, in order to increase the reliability of the control, it contains a digital-analogue converter and an analysis unit and output reactions, which includes analog-to-digital converter, trigger, multivibrator, counter, permanent memory and comparator, the first and second information inputs and output of which are connected respectively to the information output of the analog-digital converter, the first information output of the fixed memory and trigger reset input, the setup input and the output of which are connected respectively to the output of the sign of the result of the analog-digital converter and the multivibrator input, the clock input and the information input the meter stroke is connected respectively to the output of the multivibrator and the address input of the permanent memory, the second information output of which is connected to the input of the display unit, the first information output of the test generator is the output of the device for connection to the control object, the start input of the control unit is the input of the initial setup the device, the information input and the input increment of the analog-digital converter are connected respectively to the output of the subtraction unit and the second output of the control unit, the second the information input, the operation input and the output of the subtractor are connected respectively to the output of the digital-to-analog converter, the third output and the input of the control unit stop, and the input of the digital-to-analog converter is connected to the second information output of the test generator. 2. Pop-1 device, characterized in that the control unit contains a Schmitt trigger, a mode trigger, a multivibrator, a pulse distributor and a counter, a clock input and an output of which are connected respectively to the first output of the pulse distributor and the first output of the block, the trigger input and output Schmitt is connected respectively to the input of the stop and the reset input of the mode trigger, the setup input and the output of which are connected respectively to the start input and the second output of the block, the input and output of the multivibrator are connected respectively to Trigger Mode and move Valid pulse distributor, the second output of which is used to third output / current. 15 sixteen ZHU P Yu / h / 7 18 nineteen eleven Fm eight 1 "about FIG. 2 13 eleven 26 go 3 thirty 31 WITH 29