SU1287107A1 - Device for programmed control of object - Google Patents

Abstract

The invention relates to the field of automation and can be used in software systems for managing two-position objects. The purpose of the invention is to increase the reliability of the device by preventing the start of the failed device. In the event of failure of any of the elements of the device or control objects 21 (for example, stopping in an intermediate position), the output of the element 5 is generated and the signal prohibits the operation of the distributor 8 pulses and the program setting block 9, while the corresponding inputs of the elements 10 are present signals. Until the malfunction is eliminated, the NO signal coming through the driver 16 and the OR element 20 will change the state of the distributor 8 pulses and, accordingly, the output information of the program setting block 9, which, however, does not pass through the elements 10. The control signals of the control objects 21 are transmitted in the frame signal NOR. 1 il. S (l

Description

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The invention relates to automation and can be used in software systems for managing two-position objects in processing equipment for the manufacture of micro-assemblies using thick-film technology.

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

The drawing shows a diagram of the device.

The device contains sensors 1 (final) and 2 (initial) positions of objects, shiga 3 with a voltage of logic O, elements AND-HE 4, the first

element AND 5, the first shaper 6 pulses, the first element OR 7, the distributor 8 pulses, the program setting block 9 executed as a permanent memory, the third elements AND 10, the output triggers 11, the second 12 and the first 13 (with the inverse output ) delay elements, trigger element 14, trigger trigger 15, second 16 and third 17 pulse formers, second AND 18 element, NOT 19 element and second RSHI element 20. The drawing also shows control objects 21.

The pulse shapers 16 and 17 are made in the form of a one-shot, and the shaper 6 and 16 form a single pulse with a positive change in the signal at the input, i.e. when the input signal changes from 0 to 1, the driver 17 generates a single pulse when the negative signal changes at its input, i.e. when the input signal changes from 1 to O.

Unit 9 is intended for storing a program defining a sequence of switching on / off of control objects 2, switching on elements 12 and 13, and operates in a storage and reading mode. Unit 9 has outputs: output of control signals of control objects 21; one output (Delay 1) - for controlling element 12, one output (Delay 2) - for controlling element 13; one output (NP) - signal 1 in the case of non-programmability of unit 1 at a given address. Block 9 (permanent memory) is made on the basis of replaceable electrically programmable standard permanent memory devices (ROM), with an addressing principle of information retrieval (in the form of level 1), the recording of which

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The swarm in the ROM (programming) is produced by burning the nichrome jumpers with a current pulse once during the operation of the ROM. Before programming in the microcircuit, all the addresses and bits are written in O. For each address in block 9, information is programmed in the form of a multi-bit word, the bits of which are read in parallel, with one group of bits intended for control. control objects 21 - each bit of this group defines one control channel of the corresponding control object 21, one bit with a functional designation. Delay 1 is intended to control element 12, one bit to a functional designation. Delay 2 is intended to control element 13, one bit. with a functional designation, it is intended to provide conditions for the transition to reading information from block 9 at the following address if it is impossible to program the necessary control command (1) or and write unprogrammed commands to this address. In the process of programming a ROM, if it is impossible to program the necessary control command or write an unprogrammed command to a given address, it is programmed 1 in the NP format.

The device works as follows.

Before starting work in block 9, a removable ROM with the necessary program is installed. The valve 8, the output triggers 11 and the trigger 15 are preset to the zero (initial) state (to simplify the reset circuit are not shown), respectively, the control objects 21 are switched off and in the initial (initial) position (for example, when using single-acting pneumatic distributors with self-return), the contacts of sensors 2 (initial position) are closed, and the contacts of sensors 1 (final position) are open, the inhibiting sy is present at the inputs of sampling output signals of the distributor 8 and block 9 drove (O), arriving with. a single output trigger 15, in connection with which all outputs of the distributor 8 and block 9 is present O.

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Therefore, at the inputs of the elements AND-NOT 4, connected to the outputs of the respective sensors 2, there is O, coming through the closed contacts of the sensors 2 from the bus 3,

At the inputs of the elements AND-NOT 4, connected to the outputs of the corresponding sensors 1, there is 1 (for example, when using AND-NOT TTL-type logic elements, series 134, 155, 511, with unused inputs of which there is 1, dl.: Reliability unused inputs of logic elements of this type are usually connected to the bus with a voltage of 1 through resistors (not shown), since the contacts of sensors 1 are open, and the inputs of these elements AND-4 are not connected to bus 3 with the voltage O. Signal O from single outputs trigger The rails 11 are fed to the other inputs of the corresponding AND-HE 4 elements (the AND-HE 4 elements, which control the 1X state of the sensors of the final position). The signal 1 from the zero outputs of the flip-flops 11 is fed to the other inputs of the corresponding AND-HE elements 4 that monitor the state of the sensors 2 of the initial position.

Consequently, at all outputs of the elements AND-NO 4 there is 1 and through the element And 5 enters the input of the imaging unit 6 and the input of the Start button. The shaper 6 does not generate a pulse, at its output there is O which goes to the first input of the element OR 7 and through the OR element 20 arrives at the counting input of the distributor 8. Signal 1 from the zero input of the trigger 15 through the element OR 20 enters the input of the rapper 17, through the element And I8 enters the second inputs of the elements And 10, prohibiting the passage of signals through the first inputs of the output elements And 10 to the triggers 11.,

After pressing and releasing element 14 (Start button) 1 through a closed contact, it enters the single input of the trigger 15, sets it to the single state, and from the single output of the trigger 15, the start signal (1) goes to the gate inputs of the distributor 8 and the block 9, mouth - poured it into read mode. From block 9, the multi-bit word is read at the first address, and the signals

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control (1), programmed in the corresponding bits, are fed to the first inputs of the corresponding elements AND 10. The signal O from the zero output of the trigger 15 through the element OR 7 enters the input of the driver 17. The driver 17 generates a single pulse arriving at the second input of the element And 18 and, if there is no G at the output of the NP block 9 and, respectively, O at the first input of the element And 18, a single pulse through the element And 18 enters the second inputs of the elements And 10, allowing the passage of control signals to the inputs of the corresponding trigger 11. The control signal received at the single input of the trigger 11 causes it to switch to the single state. The corresponding control object 21 is turned on, which begins to move from the initial position to the final position. Simultaneously, 1 from the single output of the trigger 11 is fed to the second input of the corresponding element AND-NOT 4. At the other input of this element, AND-NO 4, connected to the output of the corresponding sensor 1I (end position), 1 is also present (as indicated earlier).

The presence of an element AND-NOT 4 1 at both inputs leads to the appearance at its output O, which through the element 4 enters the input of the former 6. When the moving object 21 reaches the specified end position, the corresponding sensor 1 is activated and closes its contact. From the bottom of the 3 O through a closed contact enters the input of the same element, AND-NOT 4. At the output, it also appears through the element 5 (in the absence of a signal, the Ban from element 13 on its second input) enters the input of the transmitter 6, which forms a single pulse arriving through the OR element 2 (to the counting input of the distributor 8 and changing its state along the leading edge.

The code of the next address from the distributor 8 output goes to the address inputs of block 9, and multi-bit read from block 9 to the next address goes to the first inputs of the corresponding elements AND 10. At the same time, the impulse from the output of the former 6 enters through the element LI 7 to the input of the former 17. By

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the front edge of the shaper 17 forms a pulse and in the absence of O at the first input of the element And 18, (i.e. the absence of 1 at the output of the NP of the block 9) it goes through the element And 18 to the second inputs of the elements And 10, allowing the passage of control signals to the corresponding triggers 11, and the operation of the device is repeated. The object 21 is in the on state until the control signal appears at the desired input of the given trigger 10, which returns to the zero state, respectively, the control object 21 is turned off, which starts moving from the end position to the initial position. The operation of the device in this case is similar to that indicated.

The operation of the device is similar to that indicated in the case of simultaneous control of several objects 21, since 1 at the input of the former 6 appears only when performing

objects 21 of the corresponding control commands, i.e. when objects 21 have reached a predetermined position and the corresponding sensors 1 or 2 have triggered and, accordingly, when 1 appears, all outputs of the corresponding AND-NOT 4 elements, i.e. at all inputs of the elements And 5 (in the absence of a signal, Ban from element 13 at its second input).

The control signal recorded in the discharge of Delay 2 at this address appears at the output. Delay 2 of block 9, respectively, enters the input of element 13 and causes a Formation signal at its output. ensuring the development of software time delays, which is removed after the delay time of element 13.

Element 12 provides a time delay between the end of the previous one and the beginning of the next cycle. The control signal recorded in Bit Delay 1 at this address, when read out, appears at the output. Delay 1 of the block .9, respectively, enters the input of element 12, causes a signal to form at its output, which goes to the reset input to zero distributor 8. At the end of the delay time, the signal from the input of the distributor 8 is removed, and the cycle is turned

torus The signal 1 recorded in the NP memory at the given address, when read, appears at the output of the NP unit 9, respectively, is fed to the inputs of the driver 16 and the element NOT 19. From the output of the element NOT 19 O enters the first input of the element And 18, prohibiting the passage strobe information recording through the second input element And 18, formed by the shaper 17.- Shaper 16 generates a pulse coming through the element OR 20 to the counting input of the distributor 8, ensuring the formation of the next address. At the same time, the same pulse arrives through the element OR 7 at the input of the imaging device 17, which forms a single pulse at the trailing edge of the input impulse that arrives at the second input of the I 18 element. If the word read at the following address contains O in the first section, the input element And 1 9 is 1 and the pulse through the element And 18 enters the second inputs of the elements And 10, allowing the passage of information on the triggers 11, and the operation of the device in this case is similar to that indicated.

In the event of a malfunction of any element of the device or control object 21 (for example, stopping in an intermediate position) where signal 1 did not form at the output of element 5, signal 1 (at the output of element 5 and accordingly at the output of element 14 (start button) is present O), when the Start button is pressed, the trigger I5 is not transferred to one state and the gate inputs of the distributor 8 and block 9 remain O, prohibiting their operation, the second inputs of the elements And 10 remain O. The device will not start until the fault is eliminated and press item 14 again (Start button)

Claims (1)

Invention Formula A device for programmatically controlling objects that contains a trigger element, position sensors of objects connected by outputs via corresponding AND-NOT elements to the first inputs of the first AND element whose output is connected to the input of the first pulse shaper, output triggers whose forward outputs are connected 712 with the device outputs, the program setting block, whose address inputs are connected to the output of the distributor, the first output through the first delay element to the second input of the first I element, and the second output through the second delay element to the reset input of the pulse distributor, characterized in that in order to increase the reliability of the device, the trigger trigger, the second element AND, the second and third pulse formers, the first and second elements OR, the element NOT and the group of the third elements AND, the first inputs of which are connected to the third m outputs of the program setting block, the second inputs to the output of the second element I, and the outputs to the corresponding inputs of the output triggers connected by the outputs with the second inputs of the corresponding AND elements NOT the output of the first 078 element I is connected via a start element to the installation input into 1 trigger trigger connected by a single output to the gate input of the pulse distributor and the control input by reading the program setting block, l zero output to the first input of the first OR element, the second input of which is connected to the output of the first driver pulse and the first input of the second element OR, and the third input to the second input of the second OR element and to the output of the second pulse shaper connected by the input to the fourth output of the task block ogrammy and through NOT element - the first input of the second AND gate, the second input of which is connected via a third pulse generator to the output of the first OR gate and the output of the second OR gate is coupled to the pulse counting input of the distributor.