SU1101788A1 - Programmed control device for mechanism with self-confinement - Google Patents

Description

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The invention relates to automation and can be used in systems of programmed control of mechanisms with self-holding.

A device for managing a group of objects is known, comprising a program block and, on each channel, control a delay element and a series-connected comparison block, as well as a memory block, a program selection block and a program switch C1.

The drawbacks of the device are a large number of times of ad hoc elements, equal to the number of control channels, as well as the absence of a pulsed launch of self-holding mechanisms. The self-holding mechanism, remote switches, contactors, etc.) memorize the signal applied and, in order to ensure their operation in control systems, require a short start signal to their inputs.

The closest to the invention is a device for programmed control of self-holding mechanisms, containing blocks for limiting the duration of signals, the first inputs of which are connected to the output of the command-control unit through the program block, and the outputs to the inputs of the corresponding self-holding mechanisms, the series OR element and the pulse generator, each block of the duration of the signals contains the first and second multi-input RS-flip-flops, and the second inputs of the blocks of the duration limit signal in interconnected and connected to the output of the pulse generator 23.

A disadvantage of the known device is the reliability of its operation when issuing commands by a program block at random times for controlling various mechanisms with self-holding. The device ensures the execution of a subsequent command from the program block only after the execution of the previous command, i.e. In the case of a command received during the execution of the previous one, the first KTrigger of the corresponding limiting signal duration block is set to one and prevents the second RS flip-flop from being set to one, resulting in a subsequent command not being executed and the device with self-hold will not work.

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

The goal is achieved by the fact that the device for programmed control of self-holding mechanisms contains blocks for limiting the duration of signals, each of which contains a first RS trigger and a second RS trigger connected by an R input to a corresponding output of a program set block connected to the output of a block commands, a pulse generator connected by the input to the output of the OR element, the first and second pulse formers are inputted, and each block of limiting the duration of the signals contains an AND element connected to the input ode of the corresponding mechanism, the first input - to the R-input of the first RS-flip-flop and the direct output of the second. RS is the second input to the input of the OR element, to the direct output of the first RS trigger and to the S input of the second RS trigger connected by an inverse input to the S input of the first RS trigger, and R input to S - by the input of the first RS-flip-flop, by the S-input - with the output of the first pulse former connected to the output of the pulse generator and to the input of the second pulse former connected to the input of the first PS trigger.

The drawing shows a block diagram of the device.

The device contains a block of 1 commands, a block 2 of a set of programs, a block 3 of limiting the duration of the signals, mechanisms 4 with self-holding, an element OR 5, a generator b of pulses, the first driver 7 of pulses, the second driver of 8 pulses. Each of blocks 3 contains two RS-flip-flops 9 and 10 and element 11.

The flip-flop 9 has first and second straight S-inputs, connected conjunctively, an inverse R input, and a forward and inverse Schloe inputs. The trigger 10 has first and second straight R-inputs, connected conjunctively, first and second straight R-inputs, connected conjunctively, and direct output.

The inverse R input of the Rs trigger 9 and the second direct S input of the PS trigger 10 are connected to the first input of block 3, the second direct S input of the g g flip-flop 9 is connected to the second input of block 3, and the first direct K. the trigger input 10 is connected to the third input of block 3. The first inputs of each of the blocks 3 are connected to the corresponding outputs of block 3, the second and third inputs of blocks 3 are connected respectively to the outputs of the first pulse shaper 7 and the second shaper 8 pulses, and the second outputs of the blocks 3 are connected to the corresponding inputs of the element OR 5.

The output of the element 11 is connected to the first output of block 3, and the direct

the output of the R5 flip-flop 10, connected to the first input of the element 11 and the first direct S-input of the RS flip-flop 9, is connected to the second output

block 3. The direct output of RS-flip-flop 9 is connected to the second input of the element I 11 and to the second I-input 9 of the flip-flop 10, and the inverse output RS of the flip-flop 9 is connected to the first pr # lm 5-input of RS-flip-flop 10.

In the initial state of the device, there are no signals at the inputs and outputs of the blocks 3, the inputs and the output of the element OR 5, the start input and the output of the generator 6, at the outputs of the first 7 and second 8 pulse conditioners. The RS-triggers 9 and 10 of the blocks 3 are set to the zero state, while the inverse output of the R5 flip-flop 9 has a single potential.

The control signal of the corresponding mechanism 4 comes from instruction block 1, is converted in accordance with a given program in block 2 of the program set and arrives at the first input of the corresponding block 3, while in this block 3 the conditions for the RS-flip-flop 10 transition to one state are implemented , as there are signals on 5-inputs of K5-trigger 10 and are absent on its R-inputs. R5 flip-flop 10 goes into one state and a signal appears at its direct output, as well as

on the first input of an AND 11 element associated with it, the first direct s-input of the RS trigger 9, on the second input of block 3, and also on the corresponding input of the OR 5 element, which results in the appearance of a signal at the generator start input 6, with this, at the output of the pulse generator, a pulse is generated that arrives at the inputs of the first and second pulse shapers. From the output of the first shaper 7 pulses, the signal arrives at the second inputs of the blocks 3, while this signal does not change the state of those of the blocks 3 whose RS flip-flop 10 is not set to one. In those blocks 3, in which the RS-flip-flop 10 is set to one and the signal is present at the first 5-input of the RS-flip-flop 9, with the arrival of the signal at the second input of the corresponding block 3, the signal appears at the second S-input RS -trigger 9, which enters a single state, with the result that at the direct output of the R-flip-flop 9 and its associated second input element And 11 and the second direct R-input of the R5 flip-flop 10, a signal appears, and the signal is inverse

the output of the RS trigger 9 and the associated first right s-input of the R5 flip-flop 10 is removed. Element 11 opens, the signal from its output, which is the first output of block 3, arrives at the corresponding search mechanism 4 with self-retention.

At the end of the pulse from the pulse generator 6, the second pulse shaper 8 generates a pulse arriving at the third inputs of the blocks 3. This pulse changes the state of those blocks 3 in which the RS-triggers 9 and 10 are set to one as the signal from the third input of unit 3 is fed to the first direct R input of the RS trigger 10, the second direct s input of the RS flip-flop d 10 connected to the right input of the Ri flip-flop 9 set to one, and on the first Direct 5-input RS-flip-flop 10, associated with the inverse entry of RS-flip-flop 9, installed in a single state.

five

SignsH is missing. RS trigger 10

in the corresponding blocks 3 is set to the zero state, and the element 11 is closed, terminating the influence of the control

signal to the corresponding mechanism 4 with self-holding. At the same time, the signal is removed from the first direct 5-input of the RS-flip-flop 9 and from the corresponding input of the element OR 5, which

leads to stopping the generator 6 pulses.

After working out the control commands of the mechanism 4 with self-holding, the RS flip-flop 9 and the device as a whole return to their original state.

When the control signal arrives at the first input of block 3 during the action of a pulse produced by a pulse generator b controlling another block 3, the RS flip-flop 10 of the first block 3 is set to one state

and to the corresponding input element

OR 5 signal is received. The RS-trigger 9 of the first block 3 is not established in the single state, since the pulse generated by the shaper 7 pulses is already

has ended The pulse generated by the pulse shaper B does not return the R5-trigger 10 of the first block 3 to the initial state, since there is no signal on the second

a direct input of an R5 flip-flop 10 connected to a single output of the P5 flip-flop 9 set to the zero state. However, at the end of the management cycle, one of

of mechanisms 4 with self-sustaining the “rats b pulses” will not stop after the signal is removed from the input of 4ent OR 5, since its other input receives a signal from the first block 3 and the generator of 6 pulses begins to generate the next pulse with a time delay determined by the parameters generator 6 X-pulses, start-up cycle of work on the management of another mechanism 4 with self-retention.

Thus, the device provides reliable control of self-holding mechanisms when executing emergency commands by synchronizing the switching on of the RS flip-flop 9 simultaneously with the leading edge of the pulse generated by the generator of pulses b, which expands the functionality of the device and enhances the operating reliability of the lero.

Claims (1)

DEVICE FOR SOFTWARE CONTROLLED MECHANISM CONTROL DEVICE, containing signal duration limitation blocks, each of which contains the first RS-trigger and the second RS-trigger connected R-input to the corresponding output of the block of the program set, connected to the output of the side of the commands, the pulse generator, connected to the input to the output of the OR element, which means that, in order to increase the reliability of the device, the first and second pulse shapers, and each signal duration limiting block contains an AND element connected by an output to the input of the corresponding mechanism, the first input to the R input of the first RS trigger and the direct output of the second RS trigger, the second input to the input of the OR element, to direct in the output of the first RS-trigger · and to the S-input of the second RS-trigger connected by the inverse output to the S-input of the first RS-trigger, R input - to the S-input of the first RS-trigger, S-input - to the output of the first pulse shaper, connected- § th input to the output of the generator im- | pulses and the input of the second pulse generator and pulse generator, connected by the output to the R-input of the first RS-TRIGGE-K pa. I m o © o © 1 101788