JPS6275802A - Summarized type operating device - Google Patents

Abstract

PURPOSE:To prevent misoperations by providing a means to reset the situation where a selection logic is satisfied after a prescribed period of time and therefore invalidating the operating command that is given with direct push of an operating command switch and with no push of a device selection switch. CONSTITUTION:When a pump A is selected, a signal 101 is produced with push of the corresponding switch and the selection satisfying signal is delivered via an exclusive logic circuit 104 and a holding circuit 107. Then a signal is produced after a prescribed period of time at the output side of an on-delay circuit 113 of an OR circuit serving as a resetting circuit. Thus the self-holding state of the circuit 107 is released and therefore the selection satisfying signal disappears. An illuminating operation switch for selection of device is also turned off after a prescribed time. Therefore such a command is invalidated that is given in case where an operator pushes directly an operating command switch with no switch of a device selection switch. In other words, the circuit 107 is kept reset as long as said illuminating operation switch is kept off and therefore the push of an operating command switch for stop of operation is invalidated. Thus the misoperations can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an integrated operating device that selects operating equipment of a plant and issues desired operating instructions.

Generally, operating devices for plant operation monitoring are used.

It is equipped with an operation switch for controlling the operation of the plant. The operation operation switches have as many devices or devices as there are to be operated, and have an illumination function to display the operation status of the devices or devices.

By the way, as the number of devices or equipment increases, the number of operation switches will also increase proportionately, and the space required for the panel to accommodate all the operation switches will also become larger, but it is important to always ensure a large space. is not limited, and the selection operation is arranged from the viewpoint of reducing the total area of the mold operation part.

For example, the configuration of a conventional selection operation device for operating and stopping all three pumps A, H, and C is as shown in FIGS. 2 and 3.

In FIG. 2, this figure shows the layout of the operation operation switches on the panel control section, where 21 is a name plate that displays the full representative name of the device or device to be operated, and 22 is a nameplate that displays three pumps A and Ll.

Illuminated operation switch for equipment selection that is displayed with all characters A-B-C engraved corresponding to C, 23 is three pumps A-
Illuminated operation switch 22 for device selection, which corresponds to B-C and is commonly used, shows all the illuminated operation switches for device operation/stop commands with the characters engraved and displayed for next operation/stop.
This is a standard for selecting five devices.

The illuminated operation switch 23 for operation/stop commands is used as an operation command switch.

As is clear from this point, the illuminated operation switch 23 for run/stop commands is shared by pumps A-B-CK, and only one set is installed on the panel operation section. Compared to the human-installed VC, the number of operation switches is reduced and the panel area is reduced.Next, the specific circuit configuration of the selection operation type aggregation device will be explained with reference to FIG.

31, 32, and 33, when A-B-C of the illuminated operation switch 22 for device selection shown in FIG. 2 are pressed simultaneously 71c,
It is an exclusive selection circuit that disables all later versions, and 3
Reference numerals 4, 35, and 36 are hold circuits which input the outputs of the corresponding exclusive selection circuits and set a logic t indicating that selection is established.

37, 38, and 39 receive a signal of establishment of selection from another exclusive selection circuit among the exclusive selection circuits.

OR circuit for releasing self-holding, 40, 41, 42
43, 44, and 45 are the outputs of each hold circuit, and 43, 44, and 45 are the first AND circuits that output an operation command signal when an AND is established between the output of each hold circuit and the operation signal of the shared operation/stop command illuminated operation switch. It is comprised of a second AND circuit that outputs the entire operation stop command signal when an AND with the stop signal of the shared stop command illuminated operation switch is established.

This selection operation type device uses an exclusive selection circuit.

When 2 is selected by the action of the OR circuit and the hold circuit and the illuminated operation switch for device selection corresponding to the constant pump is pressed, a selection establishment signal is generated in the hold circuit corresponding to the operation switch that was pressed, and this selection establishment signal is generated. continues to be held until the illuminated operation switch for equipment selection corresponding to another pump is pressed, and all indicator lights of the illuminated operation switch for equipment selection that was operated for 2 selections continue to be lit. Since the selection establishment signal is given to the AND circuit for running and stopping, when the illuminated switch for stop command is pressed, the AND is established, and a stop command is issued from the AND circuit. Ru.

Such conventional centralized operation devices have the following drawbacks.

(1) As the operator gets used to it, his or her awareness of what the currently selected device is becomes weaker.

(2) Due to the previous item, there is a possibility that you may accidentally skip the step of selecting the image device to be operated during operation, and may end up performing a mental operation such as starting or stopping directly. It was decided that 1.6 ``Santai'' devices would be produced.

Although the operation plan was originally planned, the targets for the equipment may deviate.

(3) In operations that are more closely connected to the important processes of a plant, the operations described in the previous section may result in a decrease in the safety and operational stability of the plant.

〔the purpose〕

SUMMARY OF THE INVENTION An object of the present invention has been made to eliminate the above-mentioned drawbacks, and it is an object of the present invention to provide an integrated operation device that can prevent erroneous operation by invalidating the command even if the direct operation command switch is pressed without pressing the two-device selection switch. It is about providing.

[Summary of the invention]

The outline of the aim of achieving the purpose of the present invention is as follows.

The conventional self-holding circuit (KIJ) has a self-resetting function. By pressing the illuminated operation switch for device selection, the self-holding circuit is set and a selection establishment signal is generated on the full output side. At this time, the selected device selection illuminated operation switch becomes illuminated. In addition, in this state, the operation switch for operation/stop commands can be selected by pressing the stop switch to output a stop command signal to the nL device. After the specified time has elapsed.

The self-holding circuit is released by the reset circuit and 1 is selected t'L7? Since the illuminated operation switch for equipment selection goes out and the 2 selection establishment signal also disappears, even if the operator directly presses the operation switch for operation stop command, there is no selection establishment signal, so no operation/stop command signal is generated. . In other words, it completely prevents operator errors.

[Example of the present invention]

For example, operation devices for starting and stopping three pumps A, B, and C will be explained with reference to FIG. 1.

101, 102, and 103 are provided corresponding to pumps A-B-C.
'lt signal. 104・105・106 i
.

Provided corresponding to the illuminated operation switch for selecting each device,
Signals of those operation switches 101°102, 103'
f- Manually AND the signal of the corresponding device selection operation switch and the negated signal of the other two device selection operation switches; 9. Exclusive selection circuits 107, 108, and 109 that generate signals when AND is established are provided corresponding to the exclusive selection circuits, and establishment signals of the logical OR circuit that calculates the logical OR of the output signal of the corresponding exclusive selection circuit and its own output. Hold circuits 110, 111, and 112 are provided corresponding to the hold circuits, and on-delay circuits 113, 114, and 112 are provided corresponding to the hold circuits, and input all the outputs of their own hold circuits. 11
Reset circuits 116 and 117 which output the output of No. 5 and the output signals of the other two hold circuits to the corresponding hold circuits as a reset signal obtained by ORing the output signals of the other two hold circuits using the all-off circuit.
・118 is provided corresponding to the hold circuit, and 9.118 is provided to correspond to the hold circuit and performs an AND operation between the output of the corresponding t hold circuit and the operation signal of the operating switch for operation stop command. The first AND circuits 119, 120, and 121, which output the entire operation command signal when the operation command signal is established, are provided corresponding to the hold circuits, and the output of the corresponding hold circuit and the stop signal of the operation switch for operation stop command are ANDed. , respectively, show a second AND circuit which outputs the full stop command signal when satisfied.

Next, the entire operation of the integrated operating device having such a circuit configuration will be explained.

If you do not press the illuminated operation switch for selecting each device, that is, if you do not select any pump, which exclusive logic circuit 1
No signal is generated at 04, 105, 106, and of course no output signal appears on the output side of each hold circuit 107, 108, 109, the illuminated operation switch for selecting each device is also turned off, and the operation switch for start/stop command is turned off. Even if the operation type is stopped, @11 2nd AND circuit 116.117.118.11
From 9°120 and 121, no signal is issued to stop the pump operation.

In this state, for example, if you want to select pump A, press the illuminated operation switch for device selection that corresponds to pump A.
and, by its operation, all exclusive logic circuits 104 and 105
．． Since the A signal is applied to 106, a signal appears on the output side of exclusive logic circuit 104 in order to ensure that the AND is satisfied only in exclusive logic circuit 104 corresponding to pump A. When all the signals are present, a selection establishment signal appears on the output side of the hold circuit 107, and the illumination operation switch for selecting the second selected device becomes illuminated.

When the selection establishment signal is generated, if the illuminated operation switch for run/stop command is set to the operating side, a run command signal is sent from the first AND circuit 116, and when the state is set to the stop side, f42 is output.
A stop command signal is output from the AND circuit 119, and the pump A shifts to the stopped state.

When a predetermined period of time has elapsed (for example, 30 seconds) after the selection establishment signal is issued, the self-holding of the hold circuit 107 is released and a signal is generated on the output side of the on-delay circuit 113 of the reset circuit 110. The selection establishment signal disappears, and the nine device selection illuminated operation switches are turned off. After a predetermined period of time has elapsed, the illuminated operation switch for equipment selection that has been selected will be turned off, and the selection establishment signal will also disappear, so the operator must press the equipment selection operation switch. Even if the operation switch for direct operation/stop command is pressed by mistake without making a selection, the AND of each AND circuit will not hold, so no operation command signal or stop command signal will be given to pump A.

〔Effect of the invention〕

In the present invention, the illuminated operation switch for device selection in the 2-device selection section is always turned off.

Since the operator is required to select the equipment to be operated with consideration, it is possible to call the operator's attention. While the kiln type operation switch for equipment selection in the equipment selection section is off, the hold circuit is also in a reset state, and even if the operation command switch to stop operation is pressed all the way down, it will have no effect, which has the advantage of completely preventing erroneous operation. There is.

In addition to the embodiment of the present invention, it is also possible to assemble and implement the algorithm using software using a sequence controller, in addition to hard-wired assembling using a relay sequence.

Furthermore, since the on-delay timer notifies the driver as the set time approaches, flickering the illumination section of the kiln type operation switch for selecting the corresponding equipment will have the effect of calling for even more attention.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a panel operation section of a conventional centralized operation device. FIG. 3 is a diagram showing the circuit configuration of a conventional central operating device. 31, 32.33.104.105.106... exclusive selection circuit 34, 35.36.107.108.109...
...Hold circuit 110, 111.112...OR circuit 113, 114.115...On delay circuit Agent Patent attorney Kensuke Chika and one or more others Figure 1 Figure 2

Claims (1)

[Claims] A plurality of illuminated selection operation switch circuits that exclusively select a plurality of operation targets and maintain a selection logic established state, and designate the operating state of the operation target selected by the plurality of illuminated selection operation switch circuits. It is characterized by having a driving operation command switch circuit and a timer provided in each of the illuminated selection operation switch circuits, which operates when the selection logic is established, and resets the held selection logic established state after a predetermined period of time has elapsed. Centralized operation device.