JP3432362B2 - Plant operation control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant operation controller for controlling the operation of a plant, and more particularly to a plant operation accepting a manual operation of a field device such as a pump or a valve from a screen of a display device instead of a hardware switch. Regarding the control device.

[0002]

2. Description of the Related Art In a plant, an inching test is generally performed to test whether field devices such as valves and pumps can be normally started and stopped. In this inching test, the operation was to output a device start signal to the field device, confirm that the field device started normally, then output a device stop signal to stop the field device normally. Is to confirm. In addition, inching means that a device with a long start-up time does not start 100% and outputs a small device start-up signal, for example, a start-up test passes with 10% start-up. is doing.

The inching operation carried out in such an inching test has hitherto been performed by an operator when the switch type is a hardware spring return type (CS) and the twist switch on the operation console of the control panel is operated. A series of operations in which the device is kept in the starting position and started for a certain period of time, then it is kept in the stop position to reliably stop the device, and after predetermined processing to prevent the device from automatically starting, it is returned to the automatic position. Has been done by

On the other hand, with the recent development of digital technology, a method of operating a switch from a screen of a display device such as a CRT having a touch operation function has been adopted.

FIG. 8 shows a schematic configuration of such a screen operation operation type plant operation control apparatus. The plant operation control device 1 shown in this figure is a CR that displays the configurations and states of the plant 2 and field equipment, switch symbols for equipment operation, switch selection positions, etc., as operation operation means.
The display device 3 such as T is installed on the screen of the display device 3,
A touch screen 4 for inputting a command from an operator by a touch operation, a permission switch 5 provided on a table for permitting a switch position selection command input via the touch screen 4, and a switch position from the touch screen 4 A peripheral device controller 6 for controlling input / output of a selection command and a signal from the permission switch 5 is further provided, and further, the input information from the touch screen 4 and the permission signal from the permission switch 5 are accepted to change the switch position by the screen touch operation. An arithmetic unit 7 that performs change and selection, and performs control calculation of plant equipment based on the switch position information and process information input from the plant 2.
The memory circuit 8 stores the current switch position, and the process input / output device 9 inputs / outputs data between the arithmetic unit 7 and the plant field equipment.

In such a plant operation control device 1,
In performing the inching test of the field device, the switch symbol of the starting position displayed on the screen of the display device 3 is touched, and then the permission switch 5 is pressed for a certain period of time to output a device starting signal from the arithmetic device 7, and the field device is After confirming that it started normally, this time, touch the switch symbol at the stop position on the screen and then press the permit switch 5 to output a device stop signal from the arithmetic unit 7, and the field device stopped normally. Only after confirming that the hand is allowed to switch 5
It was operated to release the switch and return the switch position to the automatic position.

In such an inching operation, the switch switching is performed by a plurality of actions, and the processes of the display device 3 and the arithmetic unit 7 are performed in time series, so that the switch position is stopped position → start position → It takes a certain amount of time or more to change the stop position, and it is becoming difficult to jog the drive motor of the device. Therefore, in addition to the switch position of the start position / stop position as the switch of each device,
The inching position is provided so that the inching can be easily performed by touch operation.

The specific inching operation by the touch operation will be described below.

At the time of inching operation of the equipment, the operator selects the equipment to be operated from the on-site equipment displayed on the display device 3,
Touch the device symbol on the screen. By this operation,
The arithmetic unit 7 inputs a device selection command from the touch screen 4 via the peripheral device controller 6, determines the selected device, and a switch symbol and an inching that reflect the switch form of the hardware corresponding to the device. The display information of the position switch symbol and the current switch position information are returned to the display device 3. As shown in FIG. 9, the display device 3 displays, for example, the switch symbols 10 at the stop position, the automatic position, the start position, and the inching position as shown in FIG. Then, the automatic position) is displayed in a distinguishable manner by changing the color of the switch symbol at that position, lighting, reverse display 11 and the like.

Here, the automatic position is a switch position when another switch position is not selected, and if a signal for activating the start condition is output from the controller (interlock), a signal for activating the start and stop conditions is given. Is a switch position where a control signal is output to a field device according to the processing result of the controller so that automatic control can be performed. Further, the start position and the stop position are switch positions for a person to select when he / she wants to manually operate the equipment and to control the equipment on site.

Next, the operator touches the switch symbol of the inching position on the screen corresponding to the inching operation of the device to select it, and then turns on the permission switch 5, and the arithmetic unit 7
Accepts the selected device inching operation command from the touch screen 4, stores it in the memory circuit 8, and outputs an inching signal as the current switch position information, and on the screen of the display device 3 as shown in FIG. The indicia display 11 for changing the color of the inching position switch symbol, reversing or the like is displayed to indicate that the inching operation is being performed.

Then, according to the control logic according to the switch type of the equipment as shown in FIGS. 10 and 11, the on-delay timers 12 and 13 output the equipment activation signal to the plant 2 for a certain period of time and then stop the equipment. A signal is momentarily output, and then an automatic signal is output to the display device 3, so that the current switch position becomes the automatic position as shown in FIG.

In the control logic shown in FIGS. 10 and 11, the start signal, the inching signal, the stop signal, and the automatic signal are signals indicating the current switch position, and are stored in the memory circuit 8 as the current switch position information. At the same time, it is output to the display device 3. The device start signal and the device stop signal are signals for controlling the device, and the process input / output device 9
Is output to the plant 2 via.

[0014]

When performing an inching operation of a device, in a conventional hard switch (CS), an operator twists the switch to hold it in an activated position and then holds it in a stopped position. When the hand is released from, it will return to the automatic position. For this reason, it is necessary to keep the switch in the stopped position by the operator's hand until it is confirmed that the device has surely stopped and further the process for preventing the device from being automatically started.

Furthermore, in the conventional screen touch operation type plant operation control device having the control logic as shown in FIG. 10 and FIG. 11, when the switch type of the device for performing the inching operation is CS, the operator does the inching operation. If you select, the device start signal will be automatically output for a certain period of time, then the device stop signal will be output momentarily, and then the device will immediately return to the automatic position.Therefore, before confirming that the device has completely stopped, from the controller When the signal that the start condition is satisfied is output, the device automatically starts, and there is a possibility that the inching test may end without confirming that the device normally stops. Further, as a countermeasure against this, it is necessary to stop the output from the controller when executing the inching test.

In addition, in the conventional screen operation control type plant operation control device, it is possible to confirm from the screen that the inching operation is being performed, but it is possible to know by the inching operation whether the device is actually starting or stopping. could not.

The present invention has been made in consideration of such a point, and an object thereof is to provide a plant operation control device which can carry out an equipment inching test completely and easily.

It is another object of the present invention to provide a plant operation control device capable of ascertaining whether the equipment is in the activated state or the stopped state even during the inching operation of the equipment.

[0019]

According to a first aspect of the present invention, there is provided a plant operation control device, a display device for displaying predetermined information for operating plant equipment, and an operator based on the information displayed on the display device. When an input device for inputting a command selected by, a permission switch for permitting a selection command of the switch position selected via this input device, and an instep operable device is selected via the input device, Each switch symbol of the stop position, automatic position, start position, and inching position is displayed on the display device as the operation switch of the device, the inching position switch symbol is selected via the input device, and the permission switch is turned on. When it becomes, the equipment start signal is output for a certain period of time as an inching operation control signal for the equipment, and then the equipment stop signal is continuously output, and the operator does not request the inching movement. When, characterized in that an arithmetic unit to automatically position the switch position of the device by turning off the device stop signal.

According to a second aspect of the present invention, an inching release request from an operator selects a switch symbol of any one of a stop position, an automatic position, a starting position and an inching position via an input device, and an enable switch is activated. It is characterized in that it is input to the arithmetic unit when turned on.

According to a third aspect of the invention, a display device for displaying predetermined information for operating the equipment of the plant, and an input device for inputting a command selected by an operator from the information displayed on the display device. , When a permit switch that permits a command to select the switch position selected via this input device and a device that allows inching operation are selected via the input device, the stop position or automatic position is selected as the operation switch for the device. , The switch symbol of the starting position and the inching position are displayed on the display device, and when the switch symbol of the inching position is selected via the input device and the permission switch is turned on, this permission switch is turned on. During this time, as a jogging operation control signal for the device, a start signal was output for a certain period of time and then a stop signal was output continuously, and the permission switch was turned off. It can, characterized in that an arithmetic device for the switch position of the device in the automatic position.

According to a fourth aspect of the present invention, while the arithmetic unit outputs the inching operation control signal, the information indicating that the inching operation is being performed on the device is started and the device is started. It is characterized in that the display device displays information indicating whether it is in a state or in a stopped state.

According to the present invention, the device stop signal is continuously output until the operator confirms that the device has normally inching and stopped, and cancels the inching operation. It is possible to surely stop without causing the erroneous operation, and it is possible to reliably prevent the restart due to the erroneous operation of the device even after the switch position returns to the automatic position.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The same parts as those of the conventional example are designated by the same reference numerals, and redundant description will be omitted.

FIG. 1 shows a plant operation controller 2 of the present invention.
1 shows an embodiment of a flat display type display device 2 such as a liquid crystal display device installed on a desk.
1, a touch screen 4 installed on the display device 21 for inputting a command by a touch operation of an operator, a permission switch 5 for permitting switching of switch positions input via the touch screen 4, and a display device. 21, a peripheral device controller 6 for controlling the input / output of signals to / from the touch screen 4 and the permission switch 5, a device operation command input via the peripheral device controller 6 and a process input device 9 from the plant 2. And an arithmetic unit 7'which outputs an equipment control signal to the plant 2 based on the process signal and outputs the operating state of the equipment to the display device 21.

2 and 3 show the control logic according to the switch type of the device for inching operation of the arithmetic unit 7 '. The start position command A, the stop position command B, the inching position command C, and the automatic position command. The position command D is input when the corresponding switch position symbol is selected via the touch screen 4.

In the control logic shown in FIG. 2, the starting position a is turned on by the starting position command A input by touching the starting position switch symbol and the enabling signal E input when the enabling switch 5 is pressed. Similarly, the stop position command B and the permission signal E turn on the stop position b, and the inching position command C and the permission signal E turn on the inching position c. When none of the starting position a, the stopping position b, and the inching position c is on, the automatic position d is on. Further, when the automatic position command D and the permission signal E are input, or when the position other than the automatic position d is turned on, the inching stop signal F is turned on.

Further, in the control logic shown in FIG. 3, when the start position a is turned on, the start signal Sa for performing color change display of the switch symbol at the start position is output, and when the start position a and the start condition Ia are satisfied, the device start signal is started. Ma is output.

Further, when the stop position b is turned on, the stop signal Sb for changing the color of the switch symbol at the stop position is displayed, and the device stop signal Mb is output when the stop position b and the stop condition Ib are satisfied.

When the automatic position d is established, the device activation signal Ma is output if the automatic activation condition Iad is satisfied, and the device stop signal Mb is output if the automatic stop condition Ibd is satisfied. It

When the inching position c is turned on, the inching signal S is first displayed to change the color of the switch symbol at the inching position.
c, the device activation signal Ma, and the activation signal Sa are output. Then, the device delay signal Mb is output in place of the device start signal Ma by the on-delay timer 12 which operates after a predetermined time, and at the same time, the stop signal Sb is output in place of the start signal Sa. Furthermore, on-delay timer 1
When the jogging cutoff signal F is turned on after the set time of 3 has passed, the device stop signal Mb, the stop signal Sb and the jogging signal Sc are turned off.

When all of the start signal Sa, the stop signal Sb, and the inching signal Sc are off, the automatic signal Sd for displaying the color change of the switch symbol at the automatic position is output.

Next, the operation of the device inching operation according to the present embodiment will be described.

When carrying out a device inching operation, the operator first selects the device to be operated from the devices displayed on the display device 21, and touches the device symbol on the screen. The arithmetic unit 7 ′ receives the device selection command transmitted from the touch screen 4 and displays the switch symbol 10 of the device as shown in FIG. 4 on the display device 21.

When the operator touches the switch symbol of the inching position on the screen corresponding to the inching operation of the equipment, the arithmetic unit 7'receives the inching command. Then, permission switch 5
When the switch is turned on, the arithmetic unit 7'receives the selected device inching operation command, stores the inching position c of the device in the memory circuit 8 as the current switch position, and the inching signal Sc and the start signal Sa. Is output, and the inching position switch symbol and the starting position switch symbol are colored on the screen of the display device 21 to indicate that the inching operation is being performed and the device is in the activated state, as indicated by reference numeral 11 in FIG. It is displayed so that it can be identified by a replacement display.

Further, according to the flow chart as shown in FIG. 5, the control logic as shown in FIGS. 2 and 3 outputs the device start signal Ma together with the start signal Sa for a certain period of time and then outputs the device stop signal Mb. Until the operator confirms that the equipment has stopped normally and releases the inching position, the inching signal Sc and the stop signal Sb, which indicate that the equipment is in the inching operation and are in the equipment stop state, are used as the equipment stop signal. Output continuously with Mb. An example of the screen display at that time is shown in the bottom of FIG.

The release of the inching position is requested by touching any one of the start position, stop position, automatic position, and inching position switch symbol 10 and then turning on the permission switch 5. As a result, the jogging cutoff signal F
Is turned on, the inching operation of the device is completed, and the switch position becomes the automatic position. It should be noted that the actual device operating state during the inching operation is displayed on the display device 11 by means of a color change display, a reverse display, a lighting display 11 of the corresponding switch position symbol.

As described above, according to the present embodiment, the switch symbol at the inching position is selected from the displayed switch symbols by the touch operation, and the permission switch 5 is turned on, thereby keeping the device constant. The device stop signal is output and the device stop signal is output until touching any of the switch position symbols and turning on the permission switch 5 again after the device has been started for a while and then stopped. Since the start signal or the stop signal indicating the device operating state is output to the display device 21 together with the inching signal indicating that there is an operation, the operator can always grasp the state of the device during the inching operation, and the switch position. The device inching operation can be finished after confirming that the device will not restart even after the device returns to the automatic position, and the device inching operation can be performed safely and easily. Door can be.

In the above embodiment, the display device 21 is used.
As an example, a flat display type liquid crystal display device is assumed, but the present invention is not limited to this, and a conventional CRT,
Other plasma displays, EL (Electro-Lumine
It can also be applied to a display device such as a scence display. In addition, we used a touch screen as an input device that detects the touched position on the screen by infrared type, electrostatic capacitance type, etc. and inputs it, but in addition to this, an indirect pointing device such as mouse, light pen, tablet etc. It is clear that it can be used.

Further, although the field equipment such as the pump and the valve has been described as the object of the inching operation, the invention can be easily applied to all the equipment which requires the test of the motor which can be operated from the screen.

Further, as another embodiment, the control logic of the arithmetic unit 7'may be set as shown in FIGS. In the control logics shown in FIGS. 2 and 3, the device inching operation is started by touching the switch symbol at the inching position and turning on the permission switch 5,
Although the device inching operation is ended by touching any one of the switch position symbols and turning on the permission switch 5 again, according to the control logic of this embodiment, the switch symbol in the inching position is changed. When the inching position command is input by touching, the inching signal Sc is output while the permission switch 5 is being turned on (for example, while pushing in the case of the push button type), the device is first operated for a certain period of time. After the activation signal Ma is output, the device stop signal Mb is output. Also, during this time, the start signal Sa or the stop signal Sb indicating the device operating state is output together with the inching signal Sc, but it is permitted by stopping the ON operation of the permission switch 5 (for example, when the push button type is released) When the switch 5 is turned off, the switch position becomes the automatic position.

As a result, the operator confirms from the screen that the device inching operation is normally performed, and confirms that the device does not restart even if the switch position returns to the automatic position. The operation can be ended, and the device inching operation can be performed safely and easily.

[0043]

As described above, according to the present invention, the device start signal is output for a certain period of time until the device inching operation is started and the inching operation end is instructed, and then the device stop signal is output. Since the switch position is kept in the inching position by continuing to output, the operator does not restart the device even if the switch position returns to the automatic position after the device normally completes the inching operation and stops. It can be easily confirmed, and the device inching operation can be performed safely and easily.

Further, during the device inching operation, the display device displays whether the start signal or the stop signal is currently output, so that the current operating state of the device can be easily grasped. .

[Brief description of drawings]

FIG. 1 is a block diagram showing a plant operation control device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a part of a control logic of the plant operation control device shown in FIG.

FIG. 3 is a diagram showing control logic subsequent to FIG. 2;

FIG. 4 is a diagram showing a display screen example of a switch position symbol according to the present invention in each state from a normal state to a jogging execution state and a state after completion of a jogging operation.

5 is a flow chart showing a flow of processing when the plant operation control device shown in FIG.

FIG. 6 is a diagram showing another example of the control logic according to the present invention.

FIG. 7 is a diagram showing control logic subsequent to FIG. 6;

FIG. 8 is a block diagram showing a conventional plant operation control device.

FIG. 9 is a diagram showing a display screen example of a conventional switch position symbol in each state from a normal state to a jogging execution state and a state after the end of the jogging operation.

FIG. 10 is a diagram showing a part of a control logic of a conventional plant operation control device.

FIG. 11 is a diagram showing control logic subsequent to FIG. 10;

[Explanation of symbols]

1, 20 ... Plant operation control device 3, 21 ... Display device 4 ... Touch screen 5 ... Permission switch 6 ... Peripheral equipment controller 7, 7 '......... Calculation device 8 ... Memory circuit 9 ... Process input / output device 10 ………… Switch position symbol 12, 13 ... On-delay timer

Claims (4)

(57) [Claims] 1. A display device for displaying predetermined information for operating equipment of a plant, an input device for inputting a command selected by an operator from the information displayed on the display device, and this input device. When a device capable of inching operation is selected via the input device and a permission switch that permits a selection command of the switch position selected via the stop position, automatic position, start position and Each switch symbol of the inching position is displayed on the display device, and when the switch symbol of the inching position is selected through the input device and the permission switch is turned on, the inching operation control for the device is performed. As a signal, after outputting the device start signal for a certain period of time, continue to output the device stop signal, and turn off the device stop signal when the operator requests the inching. And a computing device for automatically setting the switch position of the device. 2. The inching cancellation request from an operator selects one of the stop position, automatic position, starting position and inching position switch symbol via the input device,
2. The plant operation control device according to claim 1, wherein the plant operation control device is input by turning on the permission switch. 3. A display device for displaying predetermined information for operating equipment of a plant, an input device for inputting a command selected by an operator from the information displayed on the display device, and this input device. When a device capable of inching operation is selected via the input device and a permission switch that permits a selection command of the switch position selected via the stop position, automatic position, start position and When each switch symbol in the inching position is displayed on the display device, the switch symbol in the inching position is selected through the input device, and the permission switch is turned on, the permission switch is turned on. During this period, the start signal is output as the inching operation control signal for the device for a certain period of time, and then the stop signal is continuously output, and the permission switch is turned off. The plant operation control device is provided with a computing device that automatically sets the switch position of the device when 4. While the arithmetic unit is outputting the inching operation control signal, whether the apparatus is in an activated state together with information indicating that an inching operation is being performed on the apparatus. 4. The information indicating whether the vehicle is in a stopped state is displayed on the display device according to any one of claims 1 to 3.
A plant operation control device according to item.