SU1381429A1 - Multichannel device for programmed control - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used in automated monitoring and control systems. The purpose of the invention is to expand the functionality of the device through the continuous process of recording and reading the work program during the operation of the device. The goal is achieved by introducing a second pulse generator 3, a selector-multiplexer 5, the first 8 and second 9 comparison blocks, a decoder-demultiplexer 10 into the device. The device allows for automatic control of external devices. 1 il.

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The invention relates to automation and computing and can be used in automatic monitoring and control systems.

The purpose of the invention is to expand the functionality of the device by providing a continuous process of writing and reading a control program during operation of the device.

The drawing shows the block diagram of the device.

The device contains the first pulse generator 1, the first pulse counter 2, the second pulse generator 3, the second pulse counter 4, the selector-multiplexer 5, element 6, the memory block 7, the first 8 and second 9 comparison blocks, the decoder demultiplexer 10 , inputs 11 and outputs 12 of the device.

The device works as follows.

Control objects (from 1 to p) can be set at their places at any time during operation. When there is a control object at the corresponding input of the selector-multiplexer 5, the level “O” appears, and in the absence of it, the level “1.

In the initial position, the counters 2 and 4 pulses are set to “O,” “O.” is recorded at all addresses of memory block 7. The grid of pulses from the pulse generator 1 is fed to the input of the pulse counter 2 and to the generator control input of 3 bursts of pulses.

Pulse counter 2 is a binary counter that determines the cycle of operation of the device. From the output of the counter 2 pulses, the information in binary code is fed to the information input of the block 7 of the unit and the input of the comparison circuit 9.

With the arrival of the next impulse to the control input of the generator of 3 packs of pulses, it is triggered once and at its output there appears a pack of pulses (the number of pulses in the pack corresponds to the number of possible control objects and is equal to n). This burst of pulses is fed to the read control input of the memory unit 7 and to the input of the counter of 4 pulses.

Pulse counter 4 is a binary counter on n pulses, from the output of which information in binary code is fed to the address input of the selector-multiplexer 5. At the address input of the selector-multiplexer 5, the addresses are sequentially searched from 1 to p. In accordance with this output selector multiplexer 5 appears level "I in the presence of the control object or level" O in its absence.

On the leading edge of each pulse of a pulse train, numbers are overwritten.

in the counter 4 pulses, and in the interval between the pack pulses, the information recorded at this address of memory block 7 is read. Read from

memory unit 7, information is fed to the first inputs of comparison units 8 and 9. Block 9 compares this information with the indication of the counter of 2 pulses at the given moment (current time), and block 8 compares this information with zero (voltage levels corresponding to the number "0 in binary code are permanently applied to the second inputs of circuit 8]. If no information was recorded at this address (recorded "O), then output" of comparison circuit 8 "appears level" 1, which results in opening element 6. And if there is an input of element 6 at both inputs And 6, "1 output The level “O” appears, which leads to the recording in the information storage unit 7 (reading of the counter 2 pulses).

If the read information from the memory block 7 is different from "0, then the And 6 element receives the level" 0 and no information is recorded in the memory block 7 on this

address, i.e., the same value remains.

Thus, after each successive pulse of the pulse train, the information recorded at this address of the memory block 7 is analyzed, and only in the absence of this

0 information (recorded O) records the current time value at this address. As a result, in block 7 of the memory, information about the indication of the counter 2 pulses is entered at the time of installation of each control object.

5 Comparison unit 9, after each pulse, the pulse train sequentially compares the information stored at all addresses of the memory block 7 with the indication of the counter of 2 pulses.

The indication of the counter 2 pulses coincides with the information stored at any address of the memory block 7 only if the counter 2 pulses began counting the next time cycle, since the value of each number stored in the counter recurs only in the next cycle. When the information at the inputs of the comparison circuit 9 coincides, the output of it is level "1, which permits the operation of the de-demultiplexer 10. At its output, corresponding to the information on its address

0 inputs, the level of "O", which is supplied as a control signal to the control object corresponding to this address, appears.

Thus, the device provides a control signal to each control object through a time equal to one cycle of operation of the 2-pulse counter. It does not matter at what point in time the managed object is established, so

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After each pulse of the generator 1, reprogramming takes place, if necessary, by changing the information stored in memory block 7, and the device operates according to the changing program.

The proposed device allows automatic control of multiple external devices connected to this device at any time and in any sequence, if necessary, disconnecting external device data through time, determined by the cycle of their operation. The device can be used in mass production.

This allows you to expand the functionality of the software device, and the introduction of a selector-multiplexer and a decoder-demultiplexer into the device instead of the complex control blocks of each channel can significantly reduce the hardware costs for the implementation of the device, which significantly increases the reliability of the device.

Claims (1)

Invention Formula A multichannel software control device, comprising a first pulse generator, a first pulse counter, a second pulse counter, a memory unit, an AND element, characterized in that Q five 0 five expanding the functionality of the device due to the continuous process of writing and reading the control program during its operation, the second pulse generator, the first and second comparison blocks, the selector-multiplexer, de-demultiplexer, whose outputs are the outputs of the device, the output of the first generator pulses connected to the counting input of the first pulse counter and the control input of the second pulse generator, the output of which is connected to the counting input of the second pulse counter and input the readout of the memory block, the outputs of the first counter are connected to the information inputs of the memory block and the first inputs of the second comparison block, the outputs of the second pulse counter are connected to the address inputs of the selector-multiplexer, memory block and decoder-demultiplexer, the outputs of the memory block are connected to the inputs the first comparison unit and the second inputs of the second comparison unit, the output connected to the control input of the decoder-demultiplexer, the output of the first comparison unit is connected to the first input of the AND element, the second input otorrhea connected to the output of the selector-multiplexer, and an output - to a recording entry memory unit, the selector-multiplexer inputs are inputs.