SU1269098A2 - 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 improve the reliability of the device. This is achieved by introducing a display unit and a failure detection unit implemented in a certain way. The scheme monitors device failures in the operating mode with the Avariv signal being generated and stopped to eliminate emergency situations, the device state is signaled, which allows the on-line program to be monitored and receive information about failures at the time of occurrence. 3 h. P . f-ly, 3 pcs. C / E

Description

The invention relates to the field of automation, and can be used in software systems for managing on-off objects and is an improvement of the device according to Aut., No. 1041992. The purpose of the invention is to increase the reliability of the device and reduce the time lost to detect and troubleshoot. 1 shows a diagram of the device; Fig. 2 is a functional block diagram of the failure detection; FIG. 3 is a timing diagram illustrating the operation of the failure detection unit. The device contains the end position sensors 1 and the initial position sensors 2 (for example, contact type) of the objects whose inputs are connected to bus 3 with zero signal voltage, AND 4 connected in series, shaper 5 single pulses, pulse distribution unit 6, block 7 of the program set, a group of elements OR 8 and a group of flip-flops 9, elements AND-NOT 10, the first inputs of which are connected to the outputs of the corresponding sensors 1 or 2, the second inputs to the corresponding outputs of block 7 of the program set, and the outputs to the first the inputs of the element 4, the first 11. and the second 12 delay blocks whose inputs are connected to the corresponding outputs of the program set block 7, and the output of the first delay block 11 is connected to the reset input to the zero of the pulse distribution unit b, the output of the second delay block 12 is connected to the second input element And 4, the block 13 failure detection and block 14 of the display. The device also includes an output 15. Block 13 (FIG. 2) contains an element NOT 16, the first 17 ,. the second 18 and third 19 elements are And, the first 20 and second 2 delay elements and the first 22 and second 23 triggers, the device works as follows; Before the start of work, a set of programs is made that determine the sequence of on-off object by 24 jumpers connecting the receptacles of block 6 with the corresponding inputs: I-NE elements 10, OR elements 8 and blocks 11 and 12 delays Triggers 9,22 and 23 pre-set to zero (initial) state (the reset circuit of the flip-flops 9 are not shown), respectively, the object 24 is disconnected and in the initial (initial) position (for example, when using single-acting pneumatic valve with self-return, often used mye industrial manipulator tori) 2nachalnogo contact position sensors are closed, and the sensor 1 contacts open end position. In the initial state, the Start command (control signal) does not arrive at the gating input of the output signals of the pulse distribution unit 6, which is a serially connected counter and decoder, due to which all its outputs have a zero signal. Therefore, the zero signal is present at the second inputs of the corresponding AND-NOT 10 elements. At the -first inputs of the AND-NE 10 elements connected to the outputs of the respective sensors 2, there is a zero signal coming through the closed contacts of the sensors 2 from the bus 3c at a zero signal. At the inputs of the elements AND-NOT 10, connected to the outputs of the corresponding sensors 1, there is a single signal (for example, when using logical elements AND-NOT, for unpowered inputs of which there is a single signal level, for reliability all unused inputs of logic elements are connected to the bus the voltage of a single signal through resistors (not shown), since the contacts of the sensors .1 are open and the inputs of the AND-10 elements are not connected to bus 3 with a voltage of zero signal. Therefore, All outputs of the NAND 10 elements have a single signal and through element 4 it enters the input of the imaging unit 5, but a single impulse is not generated, as the imaging unit 5 generates a single impulse with a positive change of the signal at its input, i.e. signal from zero to unity. This same single signal from the output of the element And 4 is fed to the input of block 13,.

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element and 18 and the input element is not 16.

The inverted (zero) signal from the output of the element NOT 16 enters the input of the element 17 and further through the element 20 to the input of the trigger 22, which does not react to the zero signal and is in the zero state. The zero signal from the output of the element 17 through element 21 and element And, 18 arrives at the input of the trigger 23, which does not react to the zero signal and is in the zero state. Therefore, single signals are present at the inverse outputs of the first 22 and second 23 triggers. Single signals are present at the inputs of the element And 19, a single signal from the output of which is fed to the output device and to the input element And 4, allowing the device to work.

A single signal from the corresponding outputs of the elements AND-NOT 10 enters n, and the corresponding inputs of block 14 (Fig. 1), but there is no light signaling, since block 14 generates a light signal when a zero signal appears at its input, i.e. only during the operation of the proposed device.

On the Start command, which arrived at the input of the gating of the output signals of block 6, a control signal (single signal) appears at its first output, which is fed to the corresponding receiving slots of block 7 of the program set.

After the control signal arrives at the receiving socket connected to the output of the element OR 8 connected to the forward input of the trigger 9, the corresponding trigger 9 is activated and the corresponding control object 24 is turned on, which begins to move from the initial position to the final position. At the same time, the same signal on the input of the corresponding element AND-NOT 10. At the other input of the element AND-10, connected to the output of the corresponding sensor 1, there is also a single signal.

The presence of a single signal element at the IS-10 element of both leads to the appearance of a zero signal at its code, which is fed to the corresponding input of block 14 and through element I 4 enters the input of the imaging unit 5 and “and the input of block 13. At dos 690984

When the moving object 24 of a given end position moves, the corresponding sensor 1 is activated and closes its contact. From bus 3, a zero signal through a closed contact is fed to the input of the same element, AND-NOT 10. At the output, a single signal appears, which arrives at the corresponding input of block 14, and through 10 element AND 4 (if there is no signal, Ban from block 12 to its second input or the Avari signal from block 13 at its third input) it is fed to the input of block 13 and to the input of form 5, which generates a single pulse arriving at the switching input of block 6.

In this case, the control signal appears at its next (second) output, and at its first output signal

control is removed, i.e. a zero signal is set.

The control signal from the output of block 6 enters the receptacles of block 5-7, and the operation of the device is repeated. The object 24 is in the on state prior to the appearance of the control signal in the socket connected via the OR element 8 to the zero input of the trigger 9, which returns to the zero state, and, accordingly, the control object 24 is turned off. Object 24 begins to move from its final position to its initial position. The operation of the device in this case is similar to the above.

In the process of executing the control command of the control object 24, the zero signal from the output of element 4 is fed to the input of block 13. The zero signal from the input of block 13 enters the input of element 16 and to the second input of the second element 18 (figure 2). The inverted (single) signal from the output of the element NOT 16 is fed to the input of the element And 17 and in the absence of the signal. A ban on its other input a single signal is fed to the input of the element 20, made on delay

 output signal. This single signal from the output of the element And 17 is fed to the input of the element 21, made in the form of a temporary pulse delay, which leads to the formation of

its pulse output with a duration that arrives at the input of the element And 18. If a single signal at the input of the element 20 is in time longer than the delay time (the dotted line shows the signal generated in the event of a device failure, for example, stopping the object 24 in the intermediate position FIG. 3), then at its output through time i, a signal appears that arrives at the input of the trigger 22. The flip-flop 22 is thrown, and the zero signal (signal of Avari) through element And 19 enters the input of element And 4, prohibiting further operation mouth of the device, and the output of the device 15 for the subsequent generation of alarms. The delay time 1: -,: element 20 is set so as to ensure the maximum operating time of control objects 24 in the given program at a given speed. After elimination of the malfunction, the trigger 22 is reset to the initial state by the Reset signal, the Alarm signal is removed from the input of the AND 4 element, allowing further operation of the device. If the single signal at the input of the element 20 is in time less than tj, and more i-i, i.e. the device functions in a predetermined mode, then after executing the control of the object 24 (within time less than tit) the output of element 20 is a zero signal, which element 20 is reset, and it is ready for subsequent operation — the next command control . If control object 24 reaches a predetermined position earlier than the established time (when the speed is higher than the preset time), then a single signal at the output of the AND 4 element and, respectively, at the input of the AND 18 element appears at a time less than ij (the dotted line shows in the event of a device failure, for example, moving the object 24 at a higher speed, fig. 3). Consequently, at both inputs of the element 18 there is a single signal, which enters the input of the trigger 23. The trigger 23 is transferred, and the zero signal (signal of Avariya) through the element 19 enters the input of the element 4 and prohibits further operation of the device and output 15 devices for the subsequent generation of alarms. The delay time i of element 21 is set so as to ensure the minimum operation time of objects 24 according to this program at given speeds. After the fault is eliminated, the trigger 23 is reset by the Reset signal, the Alarm signal is removed from the input of the AND 4 element, allowing further operation of the device. The operation of the device is similar to c. In the case of simultaneous control of several objects 24, since a single signal at the input of the imaging unit 5 and the input of block 13 appears only when the objects 24 execute the corresponding commands (i.e., when the objects 24 reach the predetermined position and the corresponding sensors 1 or 2 and, accordingly, when a single signal appears at all outputs of the corresponding AND-NE 10 elements, i.e., at all inputs of an AND 4 element (in the absence of a signal, the Ban from block 12 at its second input or the Alarm from block 13 at its thirdThe control signal received at any receiving socket connected to the input of block 12 causes the formation of a signal at its output to prohibit the input of the input element I 4 and the input of block 13, prohibiting the operation of the device and block 13 to ensure the development of software time delays which is removed after the time delay of block 12 has elapsed. Block 11 provides a time delay between the end of the previous one and the beginning of the next stop. The control signal received at the receiving socket connected to the input of block 11 causes the formation at its output of a signal which is fed to the input to the zero setting of block 6-. At the end of the delay time, the signal from the input of block 6 is removed and the cycle repeats. The display unit 14 provides an indication of the state of the device during its operation. Zero signal coming from the corresponding element AND-NOT 10, is fed to the corresponding input of block 14, which generates a light signal, signaling the operation of the object 24.. Upon completion of the operation of the object 24 at the output of the element, AND-NOT 10 forms 7

a single signal, which is fed to the corresponding input of block 14, and the light signal is removed.

Claims (4)

1. Device for software control objects auth.St. No. 1041992, characterized in that, in order to increase the reliability of the device, it contains a display unit and a failure detection unit, the information input of which is connected to the output of the element I, the output to the output of the device and to the third input of the element I, and the control input to the output of the second the delay unit, the corresponding inputs of the display unit are connected to the Outputs of the corresponding I-NOT elements. 2. A POP device 1, characterized in that the failure detection unit contains the element NE, the first, second and third And elements, the first and second delay elements and , first and second triggers, the input element is NOT connected to the information, 690988 the input and the first input of the second element I, and the output with the first input of the first element I, the second input of which is associated with the control 5 input block, and the output with the inputs of the first and secondaries delay, the output of the first of which is connected to the installation input of the first trigger, the inverse output of which is connected to 10 the first input of the third element And the output of the second delay element connected to the first input of the second element And, the output of which is connected to the installation input of the second trigger, 15 inverse output of which is connected to the second input of the third element I connected to the output of the unit, and the reset inputs of the first and second triggers are connected to the input Reset 20 blocks. 3. The device according to claim 2, wherein the first delay element is made with a delay in the appearance of the output signal. 25 4. A device according to claim 2, characterized in that the second delay element is designed as an expander. 2 Ban dJfod Cffjooc