SU1728864A1 - Device for checking program operation - Google Patents

Abstract

The invention relates to computer technology, in particular to digital computers (micro-computer) and microprocessor systems that provide automated control of objects in real time. The purpose of the invention is to increase the reliability of the control. The device for monitoring the program progress contains a time counter 1, a generator of 2 single pulses, a generator of 3 pulses, a trigger 4 locks, elements AND 5, 6 and 7, elements OR 8 and 9, a decoder 10. The device provides control during looping and random stopping on any section of the program. 3 il.

Description

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The invention relates to computing, in particular, to digital computing machines (digital computers) and microprocessor systems that provide automated real-time control of objects.

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

Figure 1 shows the functional diagram of the device for monitoring the progress of programs; Fig. 2 shows a timing diagram of the operation of the device for monitoring the progress of the programs during the normal sequence of the program and randomly cycling or stopping the digital computer on the program section without commands for outputting signs of operation; in FIG. 3, too, to control the progress of programs when cycling a digital computer on a program section that includes a command. dy issuing signs of work.

The device for monitoring the program progress contains a time counter 1, a generator of 2 single pulses, a generator of 3 clock pulses, a lock trigger 4, elements AND 5-7, elements OR 8 and 9, a decoder 10, a lock input 11, a device command code input 12, an input 13 general reset, input 14 Power on, output 15 program faults, output 16 restarting the program, output 17 of counter 1, output 18 of the counter 1, output 19 of the counter overflow 1, output 20 of the locking trigger 4, output 21 of the element OR 9, output 22 of the generator 3 , the output 23 of the decoder 10, the output 24 of the decoder 10, output 25 of the element OR 8 of the initial installation, the output 26 of the generator 2 single pulses.

The device for controlling the course of programs works as follows.

When the program is executed in the digital computer, the input address 12 of the decoder 10 of the address line of the digital computer receives certain address codes generated in special program commands. The first code of the address of the command extracts the signal at the output 23 of the decoder 10, the second code of the address extracts the signal at the output 24 of the decoder 10. The signal from the output 23 of the decoder 10, which is the signal Sign of operation 1, passes through the OR 9 element and from the output 21 element OR 9 is fed to the first counting input of the counter 1 and to the restart input of the generator 2 single pulses. The signal at the output 21 of the element OR 9 causes an increase in one digit of the contents of the counter 1 and setting for a certain time the output state 26 of the generator 2 of single pulses to a single state. The output from the 24 of the decoder 10, which is a signal Sign of operation 2,

enters the second counting input of counter 1 and causes a decrease in its contents by one discrete. The single state of output 26 of generator 2 permits operation

5 counter 1 and trigger 4. The zero state of generator 2 causes the trigger 4 to be forced to be set to one and set to O of counter 1. The zero state of the generator 2 single pulses is determined by the presence of the initial setting signal at the 25 element output OR 8 or by the absence of for a certain time of the pulses at the output 21 of the element OR 9. To maintain a single state

5 of the output 26 of the generator 2, the time interval between the pulses at the input of the restart of the generator 2 must be less than the duration of the output pulses of the generator 2. The value of the duration of the output

0 generator 2 pulses are determined according to the real-time digital computer program operation characteristics.

With the initial start-up of the digital computer from the operator's console or automatic start-up of the digital computer when the primary power is turned on at the output

25 OR 8, a general reset signal is generated, setting an O output

26 generator 2 single pulses. Well- 0, the left state of the output 26 of the generator 2 causes the counter 1 to be forcedly set in O and the blocking trigger 4 to 1. The single state of the output 20 of the trigger 4 permits the operation of the elements of And 5 and 6 and the propagation of the frequency at the output of the generator 22

3 Through the elements of AND 7 and OR 9 to the first counting input of counter 1 and the restart input of the generator 2 single pulses. The first impulse at the output of 21 elements OR 9

0 is set to 1 output 26 of generator 2, thus allowing the operation of counter 1 and lockout trigger 4. Counter 1 counts the pulses from the output 22 of the generator 3 pulses and generates at the outputs 17 and 18

5 signals Reset DVR and Start DVR that pass through the open elements And 5 and 6 to the outputs 16 and 15 of the device and perform the initial reset and start of the DVR. At the end of the signal, the start of the digital computer at output 16

0 elements and 6 is set to the o trigger

4 blocking, allowing the operation of the decoder 10 and prohibit the passage of signals at the output 22 of the generator 3 through the element And 7.

During normal execution of the program, the digital computers of the signal-forming command Signs of operation 1 and Sign of work 2 are issued in such a way that counter 1 does not overflow and the generator 2 of single pulses are installed in O. In this case, the output 20 of the trigger 4 blocking

remains in the zero state and prohibits the formation of a fault signal and program restart at the device outputs 15 and 16.

The operation of the device to control the progress of programs when the digital computer goes into an uncontrolled state includes looping and accidental stopping of the digital computer on any part of the program.

If the program's progress is caused by accidental stopping or looping of the digital computer in the program section, which does not include commands for issuing signs of operation, the generation of signals Sign of Work 1 and Sign of Work 2, respectively, at outputs 23 and 24 of the decoder 10 does not occur. In this case, the pulses from the output 21 of the element OR 9 to the restart input of the generator 2 single pulses do not arrive, and the signal at the output 26 of the generator 2 after a certain time interval goes to the zero state, is set to 1 blocking trigger 4 and to O - counter 1. The single state of the output 20 of the blocking trigger 4 permits the passage of pulses from the output 22 of the generator 3 of pulses to the first counting input of counter 1 and determines the forced setting at 1 of outputs 23 and 24 of the decoder 10. At outputs 17 and 18 of counter 1, signals are not running equality and restart of the program and arrive at the outputs 15 and 16 of the device, producing a reset and restart of the digital computer.

When the program is disturbed due to cycling of the digital computer at the program section with commands for issuing features of work, the specified sequence of forming signals at the output 21 of the element OR 9 and at the output 24 of the decoder 10 violates the increase and decrease in the contents of the counter 1. In this case, depending on the type of command for issuing the sign of work, on which the cycling of the digital computer occurred, the contents of counter 1 reach an extreme value at a certain time interval, and at output 19 of counter 1 it appears c signal setting trigger 4 locks in 1,

The single state of the output 20 of the blocking trigger 4 prohibits the operation of the decoder 10 and permits the passage of signals from the outputs 17 and 18 of the counter 1, respectively, to the output 15 of the program malfunction and the output 16 of the restarting of the digital computer program.

The operator, if necessary, can block on the input 11 of the device for

monitoring the progress of programs forming fault signals and restarting the digital computer.

Thus, the device for controlling the progress of the programs allows

control over the implementation of the real-time DVM program in automated control systems where the possibility of using the DVR interrupt system for purposes is missing

control, to ensure the protection of the fulfillment by the digital computer of the functions of controlling objects from such unmanaged states of digital computers, such as looping and accidental stopping of digital computers on any command and on any part of the program.

Claims (1)

Claims An apparatus for controlling the progress of programs, comprising three AND elements, two OR elements, a decoder ,. generator clock pulses, a time counter, a lock trigger, the overflow output of a time counter connected to a single input of a lock trigger whose output is connected to the first inputs the first and second And elements, the outputs of which are the outputs of the malfunction and the restart of the device program, the device lock input is connected to the second inputs of the first and second elements And, the third inputs of which are connected respectively to the first and second information outputs of the time counter, the general reset and power on inputs of the device are connected to the inputs of the first element OR, the information input of the decoder is connected to the input of the device command code, characterized in that, in order to increase the reliability of the control, a single pulse generator is inserted into the device, the output of the first element OR is connected to the initial setup input of the single pulse generator, the restart input of which is connected to the output the second element OR the generator output single pulses - with the zero inputs of the blocking trigger and the time counter; the synchronous input of the blocking trigger is connected to the output of the second element AND, the first and second outputs of the decoder are connected respectively to the decrement input of the time counter and the first input of the second element OR, the second input and output of which are connected respectively to the output the third element And incremental input the time counter, the output of the lockout trigger — with the enable input of the decoder and the first input of the third element I, the second input of which is connected to the output of the clock pulse generator. l l fi.2 five L 46 P eight I I D l P