SU1649505A2 - Program-control device - Google Patents

Abstract

The invention relates to automation, in particular to software control systems. The aim of the invention is to expand the field of application of the device by ensuring the continuation of the program when blocking output signals, the issuance of which is not required when operating the device according to various technological programs. The device for program control contains a generator of 2 pulses, a block of 4 programs, a first element OR 10, a second element OR 9, a position sensor 1, a memory block 12, the first 5, second 6, third 7 and fourth 8 AND elements, the HE 11 elements. a controlled frequency divider 3 and a program interruption cancel block 13. 1 silt, 1 tab.

Description

The invention relates to automation, in particular to software control systems.

The aim of the invention is to expand the scope by ensuring the continuation of the program when blocking output signals, the issuance of which is not required when operating the device according to various technological programs.

The drawing shows a diagram of the device.

The device contains 1 position sensors, 2 PULS generator, controlled frequency divider 3, program block 4, first 5, second 6, third 7 and fourth 8 AND elements, second OR elements 9, first OR element 10, NOT 11 elements, block 12 memory, block 13 cancel program interruption.

The structure of block 13 for interrupting a program includes switches that in one position connect the outputs of memory block 12 to the third inputs of the fourth AND elements, and in the other, break the indicated connection and supply the potential of logical 1 to the third inputs of the fourth elements I.

Consider both cases.

Block 13 cancellation of the program interruption generates the potential of logical third on all the third inputs of the fourth circuit. Since the signal interrupting the execution of the program from the output of any of the fourth AND circuits, passes only if all the inputs of the corresponding AND elements have logical G potentials (based on the table for element I), it is obvious that the potentials of logical 1, generated by the interrupt cancellation unit, do not affect the operation of the device for program control and it works similarly to the known device.

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In another case, the program interruption cancellation unit 13 connects the outputs of the memory unit 12 to the third inputs of the fourth AND circuits. Since the signal interrupting the execution of the program from the output of any of the four AND circuits, passes only if the logical potentials are present at the inputs of the corresponding AND elements 1, and the signal blocking the issuance of commands to the process equipment from the output of memory block 12 comes in the form of a logical O potential, then it is obvious that regardless of the potentials on the first and second inputs of the fourth And 8 elements, then there is, regardless of the potentials generated by the OR 9 elements and the position 1 sensors, if there is a blocking signal from any of the equipment control commands, the corresponding program interruption potential will not be generated, i.e. If any of the control commands for the process equipment is blocked, the program will continue. Thus, the entered block allows you to organize a ban on interrupting program execution while simultaneously blocking the required (required) commands.

Consider an example of a specific technological program consisting of two subroutines that differ from each other by issuing a command to the processing equipment or blocking it depending on the state of one of the position sensors. For simplicity, it will be assumed that the program block forms two commands: No. 1 and N 2. Command No. 2 should be blocked by the sensor if it did not work. The blocking process should not cause program interruptions.

To solve this problem, the corresponding program interrupt cancellation unit switch (in this case, 2} must be set to the position at which it interconnects the second

the output of the block and the third input of the corresponding fourth element I. 8, according to the above, the equipment control channel will be given commands in accordance with the table.

As can be seen from the table, the device ensures the continuation of the program both with the issued command number 2 and with the locked one. Similarly, it can be solved: on the task of blocking two or more

commands depending on the state of, for example, the sensors of the progress of the technological process, while the corresponding switches of the program execution cancellation block must be set to the appropriate position.

Claims (1)

The invention The device for software control auth.St. N 1183941, characterized in that, in order to expand the scope of application, a program interruption cancellation block is inserted into it, the information inputs of which are connected to the corresponding outputs of the memory block, and the outputs to the third inputs of the corresponding fourth elements I. Table continuation Control channel f mode flffdwntt | Manual control channel f.