JP2998453B2 - Control execution order display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

2. Description of the Related Art When describing the execution order of control operations of a digital control device, a sequence logic diagram, a measurement control loop diagram, and the like are used.
It is very important to accurately describe the execution order of the operations indicated by each logical operation symbol and measurement control operation symbol. The present invention enables the execution order of such control to be appropriately displayed on a display screen as a man-machine interface of a digital control device, and also automatically changes the execution order of operations. Related to an execution order display device.

[0002]

[Prior art]

1) As a method of describing a control operation of a sequence, a ladder chart, a flowchart, a sequence logic diagram, and the like are generally used. Even in a sequence logic diagram that is considered appropriate to indicate the order of control operations, in order to decode it, add a number indicating the execution order of the operation to the logical symbol, and still understand the operation flow without observing the signal flow Further, there is a disadvantage that the drawing is complicated because the numbers of the execution order are displayed on all the logical symbols.

2) A measurement control loop diagram is used as a method for describing a measurement control operation. In order to decipher the control execution operation, the loop diagram based on the conventional description method must be viewed while associating both the instrument symbol and the table in which the execution order is described, so that the control operation can be easily performed. There was a drawback that it was difficult to grasp.

[0004]

According to the present invention, in the sequence logic diagram and the measurement control loop diagram, when the execution order of the arithmetic operation is specified, the direction of the signal flow and the execution order are the same. Depending on whether it is in the opposite direction or not, describe by changing the connection line type and display color, display the execution order visually easily, and easily execute the operation order indicated by the logical symbol or instrument symbol. It is an object of the present invention to provide a control execution order display device that can be changed.

[0005]

According to the present invention, there is provided a control execution order display device for indicating the execution order of control operations of a digital control device. Means for displaying a drawing represented by operation symbols; b) an execution order specification means for selecting and specifying an arbitrary one of a plurality of displayed operation symbols; and c) an execution order specification means. A connection display changing means for changing the display mode of the connection and displaying the connection positions having both ends between the operation symbols in the same direction and in the opposite direction in the signal flow direction and the execution order is provided. It is characterized by the following.

[0006]

According to the present invention, a CRT of a digital control device is provided.
When displayed using, the operation order of logical operation symbols or measurement control operation symbols can be easily grasped from the line type and display color of the connection connecting the symbols, and simply by inverting the line type and display color, Since the order of operation between symbols is automatically changed, the operation change is extremely easy for the operator.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a control execution order display device implemented by using this digital control device. Reference numeral 1 denotes a screen display means, a sequence logic element (sequence logic operation symbol) and a control instrument (measurement control operation symbol).
Has a display screen 12, such as a CRT, for displaying the information, and includes a display control means 11 for controlling the display screen.

Reference numeral 2 denotes input means for inputting a request from an operator, which comprises a keyboard 21, a mouse, a light pen 13, and a pointing device interface 22. Reference numeral 3 denotes a display screen data storage unit for displaying a sequence screen for displaying using a sequence logic operation symbol and a measurement control screen for displaying using a measurement control operation symbol.

Reference numeral 4 denotes input data storage means for temporarily storing the operation symbols and line segment data specified on the display screen 12 using a pointing device such as the light pen 13. Reference numeral 41 denotes line end operation symbol first storage means for storing data relating to the operation symbol and the specified position previously specified on the display screen 12. Similarly, reference numeral 42 denotes line end operation symbol second storage means for storing data relating to the operation symbol and the specified position specified later on the display screen 12. Reference numeral 43 denotes line segment storage means for storing data relating to the connection between the line end operation symbols designated before and after as described above.

Reference numeral 5 compares the input data read from the input data storage means 4 with the line segment display data of the sequence screen data or the measurement control screen data read from the display screen data storage means 3.
4 shows the connection display changing means until the data is stored again. FIG.
Is an example of a sequence logic operation diagram displayed on the screen display means 1 based on the data read from the sequence screen storage means 31, and shows an example in which the signal flow direction and the operation execution order are the same. The calculation order is 1a, 2a, 3a.

FIG. 3 is an example of a sequence logic operation diagram displayed on the screen display means 1 based on the data read from the sequence screen storage means 31, and shows an example in which the direction of the signal flow and the execution order of the signals are opposite. ing. The operation order is 2a,
1a and 3a. FIG. 4 shows an example of a measurement control loop diagram displayed on the screen display means 1 based on the data read from the measurement control screen storage means 32. An example is shown in which the direction of the signal flow is the same as the operation execution order. The calculation order is 1b, 2b, 3b. PVI001 is a signal conversion for converting and outputting a measurement signal, and PID001 is a PVI
The PID 002 indicates that the output of the PID 001 is received and output as a set value, and that the PID 002 receives the output of the PID 001 and performs the PID adjustment operation. PID001 and PID002 constitute cascade control.

FIG. 5 shows an example of a measurement control loop diagram displayed on the screen display means 1 based on data read from the measurement control screen storage means 32. An example is shown in which the direction of the signal flow and the operation execution order are opposite. The operation order is 2
b, 1b, and 3b. Here, the dotted line portions of A in FIG. 3 and A in FIG. 5 each show an example of the reverse procedure. This means that the input data taken into the operation symbols 2a in FIG. 3 and 2b in FIG. 5 is data in which the operation cycle of the digital control device is one cycle before.

FIG. 6 is a flowchart showing an execution procedure for changing the line segment display. Next, the operation of the sequence screen for changing the display of the control execution order will be described. Since the same operation is performed on the measurement control screen, the description is omitted. Operation explanation 1.

Step (1) is a display screen (12 in FIG. 1).
A predetermined sequence logic screen (FIG. 2)
Logical operation symbol 1a using a light pen (13 in FIG. 1) or the like
(1a in FIG. 2) is selected and designated, and the data is stored in the line end operation symbol first storage means (41 in FIG. 1). In step (2), the logical operation symbol 2a (2a in FIG. 3) is similarly selected and designated, and the line end operation symbol second storage means (42 in FIG. 1)
To store the data.

The above order means that the operation of step (2) is performed after step (1). In step (3), any position is specified on a line segment indicating the connection having the logical operation symbols 1a and 2a at both ends, and data is stored in the line segment storage means (43 in FIG. 1).

In step (4), assuming that the currently displayed connection is a solid line, the execution order of the operation is changed to operation symbols 1a, 2a, (1a, 2a in FIG. 2) by the operation performed in the past. And the state where the step has proceeded to (6). In this step (4), the keyboard or the like is operated to temporarily change the line type to a predetermined dotted line or the like.

In step (5), the data stored in the input data storage means (4 in FIG. 1) and the sequence screen data read from the display screen data storage means 3 are compared on the connection display change means 7. , Logical operation symbols 1a, 2
It is determined that the calculation order of “a” should be reversed (NO direction), the process proceeds to step (7), the connection connecting the calculation symbols is changed from a solid line to a dotted line, or the display color is changed. The state is stored in the display screen data storage means 3 and is maintained. Display screen (12 in FIG. 1)
This makes it easy to grasp the order of execution of the arithmetic operations.

Next, another embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a functional block diagram showing another embodiment. The difference between this embodiment and the embodiment of FIG.
And the execution order changing means 7.

The operation data storage means 6 stores operation data corresponding to a sequence screen displayed using sequence logic operation symbols and a measurement control screen displayed using measurement control operation symbols. Calculation execution order changing means 7
Is the input data read from the input data storage means 4 and the sequence logic operation data read from the sequence logic operation storage means 61 or the measurement control operation storage means 6
2 is compared with the measurement control calculation data read out from Step 2, and data processing is performed until the measurement control calculation data is stored again in the calculation data storage unit 6.

Next, an operation for changing the execution order of the control on the sequence screen will be described with reference to the flowchart of FIG. Since the same operation is performed on the measurement control screen, the description is omitted. Steps (1) to (4) proceed in the same manner as in the description 1, so that the description is omitted. Step (4)
The user operates a keyboard or the like to temporarily change the line type to a predetermined dotted line or the like.

In the step (5), the input data stored in the input data storage means 4 is compared with the sequence screen data read out from the display screen data storage means 3 on the connection display changing means 7, and the logical operation symbol It is determined that the calculation order of 1a and 2a should be reversed (the direction of NO), the process proceeds to step (9), the connection connecting the calculation symbols is changed from a solid line to a dotted line, or the display color is changed. The data is stored in the display screen data storage means 3 and the state is maintained.

At the same time, the process proceeds to step (10), where the sequence logical operation data corresponding to the currently displayed sequence screen data is read from the sequence logical operation storage means 61, and the operation order of the logical operation symbols 1 and 2 is changed. On the basis of the determination that the data should be reversed (NO direction), the processing of changing the operation order of the logical operation symbols 1 and 2 is performed, the result is stored in the sequence logical operation storage means 61, and the state is maintained. As described above, the operation order of the sequence operation is automatically changed, and at the same time, the connection at the point where the operation order is changed becomes a dotted line or the display color changes, thereby displaying on the display screen (12 in FIG. 7). The confirmation is easily performed.

In each of the above embodiments, the case where the logical operation symbol or the measurement control operation symbol is displayed as shown in FIGS. 2 and 4 is shown, but the logical operation symbol and the measurement control operation symbol are mixed. Such a control screen may be used.

[0024]

According to the present invention, for example, in the case of a sequence logic operation, the connections are displayed by changing the dotted lines and colors as shown in FIG. 3A on a display screen of a CRT or the like. It can be clearly understood that the operation of the logical operation symbol 2 is executed based on the operation result one cycle before the logical operation symbol 1. For this reason, the operator can easily confirm the operation of the apparatus, which has an excellent effect of preventing operational mistakes.

Further, the operation for exchanging the operation before and after the operation of the logical operation symbols 1a, 2a, etc. is simplified, and there is an effect that the design change can be easily dealt with.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of an embodiment of the present invention.

FIG. 2 is a sequence logic operation diagram.

FIG. 3 is a sequence logic operation diagram (an example including the reverse order of operations).

FIG. 4 is a measurement control loop diagram.

FIG. 5 is a measurement control loop diagram (an example including a reverse order of calculation).

FIG. 6 is a flowchart illustrating an operation of displaying an execution order.

FIG. 7 is a configuration block diagram showing another embodiment of the present invention.

FIG. 8 is a flowchart illustrating an operation of displaying and changing an execution order.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Screen display means 11 Display control means 12 Display screen 13 Light pen 2 Input means 21 Keyboard 22 Pointing device interface 3 Display screen data storage means 31 Sequence screen storage means 32 Measurement control screen storage means 4 Input data storage means 41 Line ends Calculation symbol first storage means 42 Line end calculation symbol second storage means 43 Line segment storage means 5 Connection display change means 6 Calculation data storage means 61 Sequence logic calculation storage means 61 Measurement control calculation storage means 7 Calculation execution order change means 1a to 4a Logical operation symbol 1b-3b Measurement control operation symbol

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G05B 19/05

Claims (2)

(57) [Claims] 1. A control execution order display device for indicating the execution order of control operations of a digital control device, comprising: a) a display means of a drawing described using logical operation symbols and measurement control operation symbols; An execution order designating means for selecting and designating an arbitrary one of a plurality of operation symbols displayed; c) connecting a connection point having both ends between the operation symbols designated by the execution order designating means to a signal flow A control execution order display device, comprising: a connection display change unit that changes the display form of the connection depending on whether the direction and the execution order are the same or opposite. 2. An operation execution order changing means for automatically changing the execution order of an operation indicated by a logical operation symbol or a measurement / measurement control operation symbol corresponding to a display form of a connection displayed on a display screen. The control execution order display device according to claim 1, wherein: