SU943790A2 - Process signalling device - Google Patents

Description

one

The invention relates to signal automation and can be applied in various industries in the development of centralized control systems with mimic, technological lines of communication which are represented by a steady or blinking light. , According to the main author. St. No. 8 40987 a process alarm device is known, which contains signal cells according to the number of displayed communication lines, in each of which signal lamps are grouped according to the number of blinking buses, the output of the RS flip-flop is connected to a flat light bus,) 5 R- the trigger input is connected to the corresponding output of the path decoder, the S inputs of all flip-flops are connected to an acknowledge switch, the output of the pulse generator is connected to the input 20 of the pulse distributor, whose outputs are connected to the blinking buses connected to one of the inputs of all NAND elements whose other inputs

connected to the corresponding outputs of the path decoder, the output of each element is NOT connected to one of the inputs of the corresponding element AND, the other input of which is connected to the bus of even light, and the output of the element AND is connected to the corresponding group of signal lamps f1.

The disadvantage of the device is the absence of alarm signals about emergency shutdown of the process equipment.

The purpose of the invention is to expand the functionality of the device.

The goal is achieved by adding an additional RS trigger, an additional INE element, an inverter whose input is connected to the output of the path decoder, the output of the inverter is connected to the first input of the additional IS-element and to

1 (-input additional IvS-flip-flop, the output of which is connected to the second input of the additional IS-NOT element, the output of which is connected to the third input of the And elements, S-input of the additional RS flip-flop is connected to the handshake switch, third of the C1 input of the additional I-HF element. connected to the corresponding output of the pulse distributor.

The drawing shows the functional diagram of the device for technological alarm.

The device contains a 1-way decoder, signal cells 2, ... 2 (, 3 pulse generator, 4 pulse distributor, bus 5. 5 blinks, auxiliary switch 6. The signal cells include groups of 7 circuits by the number of blink buses, RS- trigger 8, bus 9 level light, additional RS-trigger 10, additional element 11 AND-NOT, element 12 AND, inverter 13, warning lights ..., item 15 AND-NOT. Warning lights H ..., are placed along the way in the order of interlacing pulses, taking into account the directivity of the traveling light. The number of lamps in the cell and in the group is determined for another part of the exposed branch of the communication line.

A device for technological signaling works as follows.

The pulses from the generator 3 are continuously fed to the input of the distributor k pulses, which distributes them across the tires 5j ... .5yy, blinking in a clock sequence, (see drawing). Bus 5 5 (, pulses arrive at the inputs of elements 15 AND-NOT and with one of the buses (for example 5- () - to the third inputs of elements 11 AND-NOT. Further passage of pulses to the alarm lamps depends on the state of the decoder 1 outputs of the way.

When the signal changes at its output from 0 to 1 pulses from the bus. . 5 is freely passed to the outputs of the elements 15 NAND. At the same time, a single signal is fed to the R input of the trigger 8 and to the input of the inverter 13. In this case, the prohibition on switching the trigger 8 during the subsequent acknowledgment is reduced. The zero signal from the inverter 13 flip-flop 10 is set to state 1 on the inverse output, but the state of the element 11 is NOT

changes due to the presence of a zero signal arriving at its input from the inverter 13. In view of the fact that the inputs of the elements 12 AND from the element 11 AND-NOT and the trigger 8 receive single signals, the pulses from the outputs of the elements 15 AND-NOT can freely pass to the outputs of elements 12 and lamps 1A ..., causing the line to glow with a running light. When the acknowledging switch 6 is pressed, the S-inputs of the triggers 8 and 10 are given a signal O. The trigger 8 switches to the zero state, supplied to the even-light bus 9. Elements 12 I are also set to zero by this signal, causing the lamps to burn evenly. The state of the trigger 10 does not change due to the presence of the signal O at its R input. Thus, the line flashing with a running light translates into an oasis of evenly illuminated lines.

At emergency shutdown of the line, the output state of the decoder 1 path changes from 1 to O. With this signal, the trigger 8, the elements 15 AND-NOT and the inverter 13 switches to the state 1 and the pulses from the 5-blink bus pass to the output of the element 11 AND-NOT and further to the outputs of the elements 12 I.k. lamps 1A ... Thus, the line from the steady state is switched to the blinking state, in which all the lamps lAi ..., simultaneously light up on one of the clock cycles of the distributor t with the repetition periods determined by the duty ratio W.

The switch-off signaling visually differs significantly from the signaling of switching on the line by running light in which the lamps H ... alternately light up at each step of operation of the distributor t. By pressing the acknowledge switch 6, the operator transfers the line from the blink state to the off state. In this case, the trigger 10 switches to the state O, setting the element 11 AND-NOT and the elements 12 AND to state 1, which causes the extinguishing of the lamps X ....

The economic effect is to reduce the time it takes to detect the emergency shutdown of areas of the process equipment.

Claims (1)

1. USSR author's certificate №, cl. G 08 B 23/00, 1979.