JPH05108101A - Operator station - Google Patents

Abstract

PURPOSE:To obtain a system which can set quickly and surely MV and SV value displaying and V value displaying up to the digit of the minimum resolution, prevent the malfunction at the time of the increase/decrease operation, and in which one auxiliary machine simultaneously is not increase- decrease-operated by a different operator station. CONSTITUTION:From the operation start of increase/decrease keys 41 and 42 until the prescribed time passes, the increase/decrease operation is performed by a small increase/decrease ratio and after the prescribed time passes, by the large increase decrease ratio, the increase/decrease operation is performed, and the reception displaying of process control meter windows 6a-6c selected by selecting means 44 and 45 is during the operation reception, and the increase/ decrease operation of the auxiliary machine corresponding to it is performed in accordance with the increase/decrease key operation, and further, at the mutual control parts of respective operator stations, the lock information concerning the auxiliary machine during the increase/decrease operation is mutually exchanged through a transmitting means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operator station for monitoring and operating a plant or the like based on a process control instrument window displayed on a graphic display section.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing a conventional operator station. In the figure, reference numeral 1 is a graphic display portion of the operator station, and 2a to 2n are process control instrument windows displayed on the graphic display portion 1 corresponding to respective auxiliary machines such as valves in a plant.

Each process control instrument window 2
In a to 2n, 21 is the control set value (hereinafter, S
V value display, 22 is also the valve opening (hereinafter, M
V value is displayed, and 23 is a process value (hereinafter referred to as PV value) display at that time.

Reference numeral 3 is a control unit for controlling the operator station as a whole and controlling the display of the process control instrument windows 2a to 2n on the graphic display unit 1. Reference numeral 4 is a control signal input to the control unit 3. It is a keyboard that is used.

In this keyboard 4, 41, 42
Are each process control instrument window 2a
.. to 2n, which are increase keys and decrease keys as increase / decrease keys for instructing an increase operation or a decrease operation of the SV value display 21 or the MV value display 22.
Reference numeral 43 denotes a switching key for switching whether the value operated by the increase key 41 or the decrease key 42 is the SV value or the MV value.

Next, the operation will be described. The graphic display unit 1 includes process control instrument windows 2a to 2 similar to the front panel of a normal one-loop controller.
n is displayed for each accessory of the process. At this time,
A PV value display 23, an SV value display 21, and an MV value display 22 are displayed on the process control instrument windows 2a to 2n, respectively, and are updated periodically.

Here, when the operator changes the MV value, the switching key 43 provided on the keyboard 4 is first operated to select the increase / decrease side of the MV value, and then the increase key 41.
Alternatively, the decrease key 42 is operated to change the MV value.

Here, when the MV value is 0%, the increase key 4
When the time from the start of operation 1 to reaching 100% is, for example, 50 seconds, and the MV value is changed and the display cycle (sampling cycle) is, for example, 0.2 seconds, the number of sampling times during 50 seconds is 50 ÷ 0.2 = 250 and 250
Times.

In order to change from 0% to 100% in 250 times, the MV value increase amount per time is 10
It becomes 0.4% when 0% / 250 = 0.4. That is, in the above example, while the increase key 41 is being operated, it is 0.
The MV value display 22 is added by 4%.

This also applies to the SV value display 21. After selecting the SV value side with the switch key 43, the MV is displayed.
The SV value is changed (increased or decreased) in the same procedure as the value.

[0011]

Since the conventional operator station is constructed as described above, for example, M
When trying to change the V value display 22 from 49.0% to 50.0%, 49.0%, 49.4%, 49.8%, 5
When the rate of change is 0.2%, it cannot be adjusted exactly to 50.0%, and when the increase / decrease rate per time is reduced to 0.1%, the sampling cycle remains unchanged (0.
2 seconds), the change time for changing the full span from 0% to 100% becomes 200 seconds,
If the sampling time is shortened (0.05 seconds) in order to keep the full span change time at 50 seconds, there is a problem that the load on the CPU of the control unit 3 increases, and further, the increase / decrease keys 41, 42 and the process control Instrument window 2
If the correspondence with a to 2n is mistakenly operated, not only the auxiliary equipment increase / decrease operation different from the purpose is performed, but also when the process control is performed by the operator stations of a plurality of systems, the same operation is performed by a plurality of operator stations. There was a problem that the auxiliary machinery could be increased or decreased.

The invention as set forth in claim 1 has been made in order to solve the above-mentioned problems, and the sampling period is not changed, and the full span change time is maintained,
It is an object to obtain an operator station capable of finely adjusting the settings of MV value display and SV value display.

It is another object of the present invention to provide an operator station capable of preventing an erroneous operation when performing an increase / decrease operation.

It is another object of the present invention to provide a system in which one auxiliary machine is not operated at different operator stations at the same time.

[0015]

An operator station according to a first aspect of the present invention performs an increase / decrease operation at a small increase / decrease rate for a predetermined time until a predetermined time elapses after an increase / decrease key of a keyboard is operated. After the lapse, it will be executed at a large rate of increase or decrease.

The operator station according to the second aspect of the present invention displays the process control instrument window corresponding to each auxiliary device on the graphic display unit,
The process control instrument window selected by the selecting means displays an operation acceptance indication, and the accessory operation corresponding to the process control instrument window is increased / decreased in response to an increase / decrease key operation. ..

Further, in the operator station according to the third aspect of the present invention, the control units of the plurality of operator stations are connected to each other by a transmission means, and the lock information on the auxiliary machine which is being increased or decreased is transmitted through the transmission means. To exchange each other.

[0018]

In the control unit according to the first aspect of the invention, the increase / decrease rate is small until a predetermined time elapses after the increase / decrease key of the keyboard is operated, and the large increase / decrease rate after the predetermined time elapses. By executing the increase / decrease operation by, the operator station capable of finely adjusting the settings of the MV value display and the SV value display while maintaining the full span change time without changing the sampling cycle is realized.

Further, the control unit in the invention according to claim 2 sets the reception display of the one selected by the selection means from the process control instrument window displayed on the graphic display unit as the operation reception, and responds to it. An object of the present invention is to obtain an operator station capable of preventing a malfunction during an increase / decrease operation by executing an increase / decrease operation of an auxiliary machine according to an operation of an increase / decrease key.

Further, the control unit in the third aspect of the present invention exchanges lock information relating to the auxiliary machine which is being increased / decreased with each other via the transmission means interconnecting the control units of the respective operator stations. Thus, it is possible to realize a system in which one auxiliary machine is not operated at different operator stations at the same time.

[0021]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the invention described in claims 1 and 2. In the figure, 1 is a graphic display portion, 21 is an SV value display, 22 is an MV value display, and 23 is P.
V value display, 4 is a keyboard, 41 is an increase key as an increase / decrease key, 42 is a decrease key as an increase / decrease key, and 43 is a switching key, which are the same as or equivalent to those of the conventional one denoted by the same reference numeral in FIG. Therefore, detailed description is omitted.

Reference numeral 5 is a base screen displayed on the graphic display unit 1, and 6a to 6c are process control instrument windows corresponding to the respective auxiliary machines displayed on the base screen 5. Reference numeral 61 denotes a reception display for displaying whether or not each of the process control instrument windows 6a to 6c is an operation reception target, and the process control instrument windows 6a to 6c are provided with this reception display 61. 2a to 2n are different. It should be noted that this embodiment exemplifies a case where three windows are displayed.

44 and 45 are provided in the keyboard 4,
This is a selection key as a selection means for selecting the process control instrument windows 6a to 6c corresponding to the auxiliary machine to be the operation target of the process.

Reference numeral 7 indicates the increase / decrease operation of the auxiliary machine corresponding to the process control instrument windows 6a to 6c selected by the selection keys 44 and 45, depending on the operation of the increase key 41 or the decrease key 42. A control different from that indicated by reference numeral 3 in FIG. 6 in that the increase / decrease operation is executed with a small increase / decrease rate after a predetermined time has elapsed since the key 42 was operated and with a large increase / decrease rate after the predetermined time has elapsed. It is a department.

Next, the operation will be described. When a plurality of process control instrument windows 6a to 6c are displayed on the graphic display unit 1, one of them, for example, the process control instrument window 6a is selected as an operation target by operating the selection keys 44 and 45.

Process control instrument window 6a
When is selected, the control unit 7 first displays an operation acceptance mark on the acceptance display 61, and the increase key 4 on the keyboard 4 is pressed.
The increase / decrease operation is started according to the operation of 1 and the decrease key 42. By displaying the reception display 61 as described above, an erroneous operation during an increase / decrease operation when the multiple process control instrument windows 6a to 6c are displayed is prevented.

Here, FIG. 2 is a flow chart showing the procedure of the processing of the increase / decrease operation, and the processing is executed at a predetermined sampling cycle, for example, a 0.2 second cycle. That is, first, in step ST1, it is checked whether or not the process control instrument windows 6a to 6c are being displayed. For example, the process control instrument window 6 is displayed.
If a is displayed, the changeover switch 4 is pressed in step ST2.
The states of 3, the increase key 41, and the decrease key 42 are read.

The control unit 7 determines whether the MV value increase / decrease process or the SV value increase / decrease process is performed by reading the changeover switch 43, and according to the operation of the increase key 41 or the decrease key 42, the process control instrument window 6
The MV value display 22 or SV value display 21 of a is increased / decreased.

In this case, the control unit 7 counts the number of times the process is performed after the increase key 41 or the decrease key 42 is operated, and the count value indicates the predetermined number of times "n". Step ST3 whether or not it has been exceeded
Check with.

As a result, if it is within n times, the process proceeds to step ST4, the corresponding MV value (SV value) is increased or decreased with the minimum resolution, for example, the increase / decrease rate of 0.1%, and the process is returned to step ST1. .. If the number of times of processing exceeds n times as a result of the check, the process proceeds to step ST5, and the corresponding MV value (S
V value) is increased / decreased, and the process is returned to step ST1.

This enables fine adjustment of the set value of the MV value or the SV value only for a predetermined time (n times the sampling period) immediately after operating the increase key 41 or the decrease key 42, and the set value is set. When the value is changed significantly, it is possible to change the setting promptly with a predetermined increase / decrease rate.

Example 2. In the first embodiment described above, the case where the selection key is used as the selection means has been described, but other input devices such as a touch panel and a mouse may be used as the selection means, and the same effect as that of the first embodiment is obtained. Play.

Example 3. Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a block diagram showing an embodiment of the invention described in claim 3. In the figure, 1a and 1b are graphic display parts, 4a and 4b are keyboards, 7a,
Reference numeral 7b is a control unit, which is equivalent to the graphic display unit 1, the keyboard 4, or the control unit 7 shown in FIG.

Reference numeral 8 is a transmission means for connecting between the control units 7a and 7b. The control unit 7a (7b) corresponds to the process control instrument window in which the acceptance display 61 indicates that operation is in progress. Instrument information serving as lock information for locking so as not to be increased / decreased by another control unit 7b (7a) is exchanged with each other via the transmission means 8.

FIG. 4 is an explanatory diagram showing the structure of instrument information as the lock information, 91 is the operator station number of the operator station to which the control section 7a (7b) which sent the instrument information 9 belongs, and 92 is It is the operating instrument number indicating the equipment number of the auxiliary machine operated by the control unit 7a (7b).

Next, the operation will be described. Here, FIG.
Is a flowchart showing the procedure of the processing. Now, the control unit of one operator station, for example, the control unit 7
When "accepting operation" is displayed in one reception display of the process control instrument window displayed on the graphic display unit 1a in "a", the control unit 7a causes the operating instrument number 92 of the corresponding auxiliary machine and the operator station number 91 of the operator station. To generate the instrument information 9 and send it to the control section 7b via the transmission means 8 (step ST
10, ST11).

The control section 7a obtains the control right of the auxiliary machine by this and accepts the operation, but when the control section 7b has acquired the control right of the auxiliary machine first and there is no failure in the control section 7b. In this case, the control right of the auxiliary machine is not acquired (steps ST12 to ST15).

If the control unit 7b is out of order, the control unit 7b releases the lock and sends the instrument information 9 to acquire the control right of the accessory (step ST16, ST17). The control unit 7a that has acquired the control right
Performs the same MV and SV value increase / decrease operation as in the first embodiment (step ST18).

The same processing is executed on the control section 7b side as well, whereby it is possible to avoid the increase / decrease operation of the same variable of the same auxiliary machine from a plurality of operator stations.

Example 4. In the third embodiment, the case where there are two system operator stations has been described, but the present invention may be applied to the case where there are three system stations or more, and the same effect as the case of the above embodiment is obtained.

[0041]

As described above, according to the invention described in claim 1, the increase / decrease rate is small until a predetermined time elapses after the increase / decrease key of the keyboard is operated, and after the predetermined time elapses. Since it is configured to execute the increase / decrease operation at a large increase / decrease rate, it is possible to maintain the full span change time without changing the sampling cycle, and the MV value display and SV value display can be swiftly and reliably to the digit of the minimum resolution. There is an effect that an operator station that can be set is obtained.

According to the second aspect of the invention, the reception display of the one selected by the selection means from the displayed process control instrument window is set to the operation reception, and the number of auxiliary machines corresponding to the operation display is increased or decreased. Since the operation is configured to be executed according to the operation of the increase / decrease key, there is an effect that an operator station in which an erroneous operation does not easily occur can be obtained during the increase / decrease operation.

Further, according to the invention of claim 3,
Since the lock information about the auxiliary machine during the increase / decrease operation is exchanged with each other by the control unit of each operator station, it is possible to obtain a system in which one auxiliary machine is not simultaneously increased / decreased in different operator stations. There is.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure of the above embodiment.

FIG. 3 is a configuration diagram showing a third embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a structure of lock information in the embodiment.

FIG. 5 is a flowchart showing a processing procedure of the above embodiment.

FIG. 6 is a configuration diagram showing a conventional operator station.

[Explanation of symbols]

 1, 1a, 1b Graphic display section 4, 4a, 4b Keyboard 6a-6c Process control Instrument window 7, 7a, 7b Control section 8 Transmission means 9 Lock information (instrument information) 41 Increase / decrease means (increase key) 42 Increase / decrease means (decrease) Key) 44, 45 selection means (selection key)

Claims (3)

[Claims] 1. A graphic display unit for displaying a process control instrument window for controlling each auxiliary machine such as a valve in a plant, and a control unit for controlling the display of the process control instrument window on the graphic display unit. And an operator station including a keyboard having an increase / decrease key for performing an increase / decrease operation of the control set value of the accessory, a valve opening degree, etc. with respect to the control unit, the control unit is configured to operate the increase / decrease key. The operator station is characterized in that the increase / decrease operation is executed with a small increase / decrease rate until a predetermined time has elapsed after the operation and with a large increase / decrease rate after the predetermined time has elapsed. 2. A graphic display unit for displaying a process control instrument window for controlling each auxiliary machine such as a valve in a plant, and a control unit for controlling the display of the process control instrument window on the graphic display unit. In the operator station, which is provided with a keyboard having an increase / decrease key for performing an increase / decrease operation of the control set value of the auxiliary device, the valve opening degree, etc. with respect to the control unit, the operator station displayed on the graphic display unit, A selection means is provided for selecting one of the process control instrument windows corresponding to each accessory, and the process control instrument window is provided with:
The control unit is provided with a reception display that indicates that the process control instrument window has been selected, and the control unit displays that the operation is being received on the reception display of the process control instrument window selected by the selection unit. An operator station, wherein an increase / decrease operation of the auxiliary device corresponding to an instrument window is executed according to an operation of the increase / decrease key. 3. A system comprising a plurality of operator stations according to claim 1 or 2, wherein the control units of the respective operator stations are connected to each other by a transmission means, and the respective control units relate to an auxiliary machine during an increasing / decreasing operation. An operator station, characterized in that lock information is exchanged with each other via said transmission means.