SU785848A1 - Device for centralized changing-over of control system operating modes - Google Patents

Description

one

The invention relates to the field of automation and to be used.

in ship management systems.

The use of devices for switching control system operation modes is known. The functional control unit of the automated control system 1 contains operating and control power units and a mode switch, logic blocks, control units and other elements. The mode switch contains a key with the Work position, in which the power supply circuits of the executive bodies are connected to the operating power source, and the Control position, in which the control circuits of the executive bodies are monitored without their triggering using low level signals from the control power source.

Similarly, the switching of operating modes in devices 2l, 3, and 41 is carried out. Since these devices contain only one source of working and control power, there are no centralized switching of the modes;

which executive bodies are dispersed in numerous local posts having individual galvanically developed from other posts

5 — power sources and associated cable lines to the central control station. Such control systems are widely used on ships, railway transport and

0 other fields

Of the known devices, the closest technical solution to the invention is device 5, which in the control mode of an electromagnet 5 tov works in conjunction with device 2, and in the mode of functional control of the control system in combination with devices 3 and 4. In device 5, it contains

20 control unit of the mode setpoint and in each local control unit a repeater of modes, the input of which is connected to the direct output of the mode setter, control and operating power sources and executive units whose power supply wires are connected to the output of the AND-OR element, the first inputs of the first and second groups of inputs of which connected to the direct and inverse outputs of the repeater, respectively, and the second inputs to the sources of the control and remote power, respectively. The drawback of the device is the possibility of supplying the operating power in the circuit of the executive bodies and their operation in the control mode in the event of a fault in the circuits switched by the mode. Actuation of the executive bodies in the control mode in the critical systems, for example, ship automation, is unacceptable. In addition, the device does not contain information on local control units that the central control unit of the axle; there is: switching the operating modes of the system. The central control unit does not provide information on working out the system control commands in all local control units and the absence of faults. in the paths of switching modes. The aim of the invention is to eliminate these disadvantages as well. it is an extension of the functional capabilities of the device by excluding the actuation of the executive bodies in the control mode when faults in the circuit switching modes and by issuing information in local units about centralized. . switching modes of the system, and in the central control unit about the malfunction in the paths of switching modes. The goal is achieved by the fact that in the proposed device the central control unit has entered the first AND element and the fault indicator of the switching paths connected to it, and the memory element, the second and third And elements and the mode switching indicator of the system connected to the output of the third element And, the first input of which is connected to the direct output of the repeater of modes and to the single input of the trigger and the second input to the output of the trigger and the first input of the second element; And, the output of which connected to the third inputs of two groups of inputs of the ORI element, and the second input - with the inverse output of the mode repeater and with the corresponding first input of the first element I, the second input of which is connected to the direct output of the mode setpoint, the inverse output of which is connected to zero trigger input. The drawing is given structural patterns of the device. The equipment is located in the central control unit and in the local units 2. The central unit 1 contains a mode selector 3 with direct 4 and inverse 5 outputs / element 6 with inputs 7, -8 and an indicator of failure of switching points 9. Local unit 2 contains a repeater of modes 10 with direct 11 and inverse 12 outputs, a memory element 13 with a single 14 and zero 15 inputs and an output 16, an AND 17 element with inputs 16 19 and an output 20, an AND-OR element 21 with inputs 22-27 and the output 28 connected to the power bus of the executive bodies 29, the sources of the control 30 and the working 31 power, lement and 32 to inputs 33, 34 and an outlet 35 connected to the indicator 36 the switching modes of the system. The mode repeater 10 is connected to the direct output 4 of the mode selector 3 and to the input 7 of the element AND 6. The inputs of the AND-OR 21 element form two diesjun “positively connected groups 22-24 and 2527, In the first group, the inputs 22, 23 and the inverse 24 connected conjunctively. In the second group, the inverse input 25 and the inputs 26.27 are connected koniktivno interconnected. In this case, the input 22 is connected to the control power supply 30, the input 23 to the forward output 11 of the repeater of modes 10, the single input 14 of the memory element 13 and the input 14 of the And 32 element, inputs 24,25 to the output 20 of the And 17 element, input 26 - to input 19 element; and AND 17, inverse output 12 of repeater mode 10 and corresponding to this local unit input 8 of element AND 6, and input 27 of element OR1 21 is connected to operating power source 31. Inverted output 5 of mode setpoint 3 is connected to zero input 15 of the memory element 13, the output 16 of which is connected to the input 18 of the element AND 17 and swing member 33 and 32. The inputs of the AND 8 6, relating to different local bloksts upravleli 2 form disjunctive associated group. . The principle of operation of the device is as follows. Control system: years of work in the operating mode or in the control mode. In the operating mode, the setting device 3 is found in its initial position when there is no signal at the direct output 4 and there is a signal at the inverse output 5. At this, element 13 is set to zero position by a signal at input 15, no signals at output 11 of repeater 10, input 14 and output 16 elements .13, input 18 and output 20 of element AND 17, inputs 2325 of element AND-OR 21, inputs 33.34 and output 35 of element AND 32, on indicator 36, and also at input-7 of element AND 6. There are the signals at the output output 12 of the repeater 10, the input 19 of the element And 17, at all inputs to the element And 6 and at the output 26 of the element AND-OR 21 ,. As a result, the conditions for the operation of the AND-OR element 21 in the second group of inputs 25, 26, 27 are implemented, as the input 25 is inverse. At the same time, an operating voltage from source 31 is supplied to the power bus of the executive organs-29 from the output 28 of the AND. 21 element. In the control mode, a centrally controlled switching of | 3 is performed, which removes the signal from the inverse output 5 and zero input 15 of the element 13 and a signal appears at the direct output 4 of the setting device 3, the inputs of the repeaters 10 of all blocks 2 and the input 7 of the element 6. At that, all the repeaters 10 switch off the signal from their inverse output 12 and output the signal at the direct output 11 As a result, signals appear in the input 23 of the element IL-21, the single input 14 of the element 16 and the input 34 of the element 32. The command for centralized switching from the operating mode to the control mode is memorized in all local control units, where elements 13 are triggered, from output 16 of which outputs The signal to input 1B of element 17 and element 33 of input 32 is realized. At that, the conditions of operation of element 32 and the local control unit turn on indicator 36. Since there is no signal at the inverse output 12 of repeater 10, there are no signals at the inputs 8 elements And b, input 19 and corresponding The output of the 20 elements AND 17, the input 26 and the inverse inputs 24, 25 of the AND-OR element 21. At the same time, the indicator 9 is not lit, and for the AND-OR element 21, conditions are implemented for matching the first group of inputs 22 23, 24 so as input 24 is investment. As a result, a control voltage from source 30 is supplied to the power supply busbars 29 from the output 28 of the element ORIL 21, and the operating voltage is turned off. Since the control voltage is significantly lower in level than the operating voltage, the control mode of the actuator circuits or the functional control of the control system is carried out without the actuation of the organs 29. A special feature of the device is the elimination of the actuation of the actuators and information in the central control unit in violation of path switching modes of systems. If a violation occurs in the control circuits of the driver 10 of any local unit 2, for example, an interruption or short circuit of the communication line or other damage, the operation of the circuit depends on when the damage occurred. If the damage is aacTvratno in the operating mode of the control system, an operating voltage is applied to the power supply circuit of the organs 29. However, the subsequent switching of the control system to the control, when a signal appears at the output 4 of the setter 3, due to the failure of the repeater 10 due to a fault in its circuit, the signal from its inverse output 12 and corresponding to 1, its input 8 of the element 6 is not removed. As a result, the indicator 9 lights up and in the corresponding local control unit does not turn on the system mode indicator indicator 36. With a hot indicator 9 and a non-burning indicator 36, the control of the control system is not carried out by the operator until the damage of the mode switching paths is repaired. A damaged switching circuit is determined by the number of the local control unit in which indicator 36 is not lit. If the damage occurred during the system monitoring, then it is extremely important that the activation of the organs 29 in the functional control of the system does not trigger them, That the device, in case of damage in the process of control, provides automatic disconnection of the power supply circuits of the organs 29 from both source 30 and source 31. In this way, the device operates as follows. Since during the monitoring mode, the fact of switching to the control is remembered and there is a signal at the output 16 of element 13, when the switching path is damaged, cc: rd;) the signal at output 11 is turned off and the signal at output 12 of the subscriber 10 appears. both inputs 18 and 19 of the AND 17 element. At the same time, from the output of the 20 element AND 17, a signal is received to the inverted inputs 24, 25 of the ORI element 21, which leads to the disconnection of the AND-OR 21 element and, accordingly, the power supply circuits of the organs 29. Moreover, due to the absence of a signal at the input 34 of the element And 35 the indication is turned off OP 36 of the corresponding local control unit, and in the central control unit, the signal is at the corresponding input 8 of the element AND 6, which causes the malfunction indicator 9 to ignite. In this case, the translator has the ability to carry out functional control of the control system in this case. mode. Thus, the device provides an increase in the reliability of the system of the board, since it excludes the slab. The system of controllers in the control mode with faults in the switching modes, and has more extensive functionality than the known devices, as it provides, the issuance of information at the local posts about the central switching of the operating modes of the system, and at the central post about

Claims (1)

SUMMARY OF THE INVENTION Apparatus for centralized ^J ereklyucheniya modes of operation control system comprising a central control unit mode dial "and each local control unit, the repeater mode, whose input is connected to Yu prya№1m setpoint output modes, power control and worker. power supply and executive bodies, the power bus of which is connected to the respirator of the AND-OR element, the first inputs of the first and second groups of inputs of which are connected respectively to the direct and inverse outputs of the mode repeater, and the second inputs are connected to the sources of control and 20 operating power supplies, respectively, differing the fact that, in order to expand the functionality of the device, the first И element And and the malfunction indicator ** of switching paths connected to it are introduced into the central control unit, and in each local control unit line - a memory element, the second and third · element And, and an indicator of switching the operating modes of the system, connected to the output of the third. the first AND element, the first input of which is connected to the direct output of the mode repeater and to the single input of the trigger, and the second input - to the output of the trigger and the first input of the second And element, whose output is connected to the third inputs of the two groups of inputs of the AND-OR element, and the second input - with the inverse output of the mode repeater and with the corresponding _(the first input of the first element And, the second input of which is connected to the direct output of the mode dial, the inverse output of which is connected to the zero input of the trigger.