JPH0472244B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a logical connection diagram display device, and is particularly suitable for displaying a created program on a screen in the form of a block diagram, and for programming while generating a program on the screen. The present invention relates to a logical connection diagram display device.

Traditionally, programmable controllers (hereinafter referred to as PCs) for process control, including adjustment control such as PID control,
A programmer (abbreviated as ) is a programmer who writes programs in a list format to a digital display such as a light display tube or a CRT.
The mainstream has been the type that allows programming while being displayed on the screen.

On the other hand, in order to improve program visibility,
In the field of sequence controllers, programmers are emerging that allow programming while displaying sequences on a CRT, etc., using ladder displays or block diagrams using Boolean algebra logic element symbols.
In this case, in the field of PCs that include adjustment control, it is also necessary to display control parameters for each control calculation element (hereinafter abbreviated as calculation macro including logic elements). A system has been developed in which each calculation macro is automatically arranged on the screen to create and display a block diagram, and control parameters can also be displayed.

As the number of controller programs increases, the display screen of such a logical operation connection diagram is required to have a higher density and easier to understand display.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sequence display method that makes it easy to see the main part of a sequence that is densely packed or spans multiple screens as the scale of the program increases, and makes it easier to understand the functions of the program.

The present invention increases display density by arranging a plurality of calculation symbols in the horizontal direction between a predetermined input address on one side displayed on one side of the screen and a predetermined output address on the other side displayed on the other side of the screen. When connecting each arithmetic symbol, connect both symbols with a horizontal straight line so that the output address of the logical symbol in the previous stage becomes the specified input address (for example, the first input) of the logical symbol in the subsequent stage. It is characterized in that the connections of other input addresses of the logic symbols in the subsequent stage are displayed bent on the screen.

Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 shows an example of a control block diagram expressed by control operation elements (operation macros). This block diagram is a code conversion macro for numerical signal A001.
Numerical signal A002 and numeric signal converted by SC
A003 and A004 are added together using the adder macro AD to generate the numerical signal A005, and when the bit signal D001 is 1, the signal A005 is converted into a signal using the switch macro SW.
This shows a circuit that outputs the signal A007 as the signal A007, and outputs the signal A006 as the signal A007 when the bit signal D001 is 0.

FIG. 2 shows an example of the configuration of the PC 1 that executes the control of the control block diagram as described above, and the CRT interactive programmer 2 that displays the control block diagram.
A program for executing the control of a given control block diagram is stored in the memory 12 of the PC 1, and input from the transmitter TX taken in by the input/output processing device 10 in response to instructions from the arithmetic processing device 11. The results calculated based on the signals are outputted from the input/output processing device 10, and control is executed by driving the control valve CV and the like.

FIG. 3 shows an example of the configuration of the program 100 and storage areas 101 and 102 in the memory 12 for executing the control shown in FIG.
That is, the periodic activation management program 111 is periodically activated by the interrupt signal INT from the timer 110 that operates at a constant cycle, and under the control of this program, the input/output processing program 112 and the input/output processing program 112 are activated at a predetermined period. Control calculation processing program 113
is activated periodically.

When activated, the input/output processing program 112 takes process data from the process input/output device 10 into the data table 102 based on the input/output data specification table 114, and transfers output data from the data table 102 to the input/output device 10.
Note that constant data (control gain, time constant, etc.) is stored in a constant data table 118, numerical data is stored in a numerical data table 117, and bit data is stored in a bit data table 116.

Next, when the control calculation processing program 113 is started, it executes control calculations while interpreting the control calculation specification table 115. At this time data table 1
Necessary data is read from 02 and the calculated results are stored in table 102 again.

FIG. 4 shows the contents of the control calculation specification table 115 and data table 102 shown in FIG.
A part of the control shown in the figure is shown as an example. As shown in FIG. 4, the control calculation specification table 115 includes a calculation order table 1151 that specifies the execution order of control calculations, and a calculation specification table 1152 that specifies the wire numbers of the input/output signals of the calculation macro and the storage addresses of the control parameters. Consists of. Therefore, the control calculation processing program 113 first looks at address 2600 in the calculation specification table 1152 since the first data in the calculation order table 1151 is 2600. Then, it determines that the content is the corresponding code 18 of the code conversion operation macro SC, and
Jump to the processing routine. In the macro SC processing routine, input signals are stored in the data table 102.
It is extracted from address A001, the processing result is stored at address A002, and control is returned to program 113. The program 113 then similarly uses the operation order table 115.
Since the second data of 1 is 2610, look at address 2610 in the calculation specification table 1152. Then execute the processing of addition operation macro AD and send the result to A005.
Store in address. Here, the output signal line number (output address) of the macro SC output signal is the output signal line number (output address) of the macro SC output signal.
This is the input signal line number (input address) of input 1 of AD. The calculation is performed in this way. In addition, in the case of AD in the calculation macro, the control gain is stored after address C001 to add gain, etc., and the output signal A005 is the input signal A002, A003,
A result is obtained by adding the results obtained by adding the gains G1, G2, and G3 to each of A004.

The above is the programmable controller 1 shown in Figure 2.
The configuration and control operation of the CRT interactive programmer 2 (FIG. 2) will be explained next.

First, the programmer 2 stores a memory 23 for temporarily storing a program as shown in FIG. A memory 22, a refresh memory 28 that stores programs converted to display calculation macro symbols, and a keyboard 26 for performing operations to display calculation macro symbols.
and its control circuit 25, memory 1 of controller 1
2 to the memory 23 of the programmer 2.

In such a configuration, first, to display the program stored in the memory 12 on the CRT 29,
Key in the circuit readout key provided on the keyboard 26. Then, memory 1 of controller 1
The program stored in 2 is loaded into memory 23. The code of the calculation macro in the program imported here is decoded by the conversion program stored in the memory 22 (18 in the case of SC, 18 in the case of AD).
01), symbol, number of input points (up to 3 inputs for AD), and input/output signal wire numbers are determined. In the case of the addition macro AD in FIG. 4, it can be seen from the number of data that the number of input points is 3, and it can be seen that the number of control parameters after C001 is 3.

The calculation macro symbol consists of n basic pixel areas (four in this example), and their arrangement is automatically arranged as shown in FIG. That is, when the control block is taken as an example in FIG. 1, first, SC-A002 is automatically placed in the block (X=3, Y=1, 2, 3, 4) and automatically connected to input A001. Then AD−
A005 is automatically arranged so that the output of SC-A002 is in a straight line with the input of AD-A005, and each input A003,
I try to automatically connect with A004, but I can't connect it in a straight line. Therefore, inputs A003 and A004 are SC−
Avoid A002 and connect automatically as shown. Similarly, block numbers in the calculation macro symbols in Figure 1 (SC-A002 is 001, AD-A005 is 002)
Automatic wiring is performed according to the following. A state where automatic placement is possible means a state where the space is not already being used by other calculation macros or wiring.

As shown in Figure 5, the connection of the input signal wire number of input 1 of each calculation macro symbol, which is arranged horizontally from the left side to the right side on the screen, is displayed as a horizontal straight line. has been done. On the other hand, connections of input signal line numbers of other inputs of a calculation symbol are displayed as curved lines so as not to cross other calculation symbols on the screen. Furthermore, the connection of input 1 of each logical operation symbol is displayed at the top of the connections of other inputs, and is displayed in a straight line from one side of the screen to the other side. Thereby, the signal route of the first input from one side of the screen to the other side, that is, the main route of the sequence on the screen can be clearly distinguished from the others.

On the other hand, even if the SHEET NO shown in Figure 9 is the same (drawing or function range is the same) and the screen is divided into multiple sections, the input/output signal wire numbers displayed at both ends of the above straight line connection may be The connection relationship with the screen can be easily understood.

Next, a procedure for generating a program on the CRT screen by a key-in operation from the keyboard 26 of the programmer 2 will be described. When creating or modifying a control block diagram, it is necessary to separate the already created block diagram from the newly created block to prevent confusion.Also, in calculations where there are many types of input signals and there is a risk of incorrect wire number specification. For macros (such as PI calculation macros), it is necessary to be able to distinguish between input terminals. For this purpose, as shown in FIG. 6, the CRT screen is divided into a monitor viewing space 31 and a drawing space 32, and a previously created block diagram is displayed in the drawing space 2, and an arithmetic macro that is being created is displayed in the monitor viewing space 31.

Figure 7 shows the key-in procedure KEY and monitor view 31 when programming the calculation macro AD.
shows the relationship between In the figure, keys 1 to 4 indicate operations, and the display contents of the view 31 for each operation are shown. Then, using the SET key 4 as a break, the programmer 2 is informed that the program creation of the calculation macro has been completed, and at this timing, the display of the monitor view 31 is automatically arranged on the main screen 32. Note that block numbers are automatically assigned in the order in which the calculation macros are created.

FIG. 8 shows the key-in operation KEY for creating the control block diagram shown in FIG.

FIG. 9 shows the key operation procedure KEY and display contents when changing the settings of gains 1 and 2 of the calculation macro AD to 0.500 and 0.470, respectively. However, the display when inputting 0.500 at step (6) and SET at step (7) shows a change only at line 05 of the display at step (5), and similarly when inputting 0.470 at step (8).
The display when inputting SET is the line shown in step (5).
It shows the change only at 06.

According to the CRT interactive programmer described above, programs can be efficiently created, modified, and examined by displaying the program block diagram and its parameters, but as mentioned above, it is difficult to identify the changed parts when making changes. is not specified.

Therefore, in the present invention, when the program of an already created block diagram as shown in FIG. 10 is changed, the changed part can be identified with a special mark etc.
This will be explained below using the figure as an example.

FIG. 11 shows an operation order table 1151 and an operation specification table 1152 corresponding to the block diagram shown in FIG. In this example, the calculation specification table 1152 is stored at the memory address with the lowest number as shown by the arrow in the order in which calculation blocks are created starting from address 261F (hexadecimal), and the calculation order table 1152
starts from address 2000 (hexadecimal) in the order of execution,
Operation specification table 115 corresponding to each operation macro
The first address above 2 is stored. In this example, the block numbers of the calculation macros in FIG. 10 correspond to the order in which the calculation specification table start addresses are entered in the calculation order table 1151, that is, the calculation execution order of the calculation macros. Furthermore, in order to always indicate the used area of the calculation specification table 1152, the final address of the calculation specification table 1152 is stored in the final address pointer EP.

Therefore, between blocks 2 and 3 in Figure 10,
The case of inserting an AND element will be explained. The cursor key is operated to align the cursor with block 3 as shown in FIG. 12, and the block diagram shown in FIG. 14 is obtained by the operating procedure shown in FIG. 13. From this figure, by assigning a new block number such as block number 2A, the additional macro can be identified.

As shown in Figure 15, this mechanism uses the final address pointer at the time the insert key is inserted.
The address 2606 number pointed to by EP is stored at a predetermined address EP as the final address before modification.
On the other hand, calculation specification table 1 of the inserted calculation macro
The first address 2603 of 152 is inserted at the third position in the operation order table, and the third address is shifted to the fourth position.

The program that displays the block diagram on the CRT is
The contents of the operation order table 1151 are sequentially compared with the final address before modification (address 2606), and since the address is younger than this, it is determined that only the macro AD specified at address 2603 of the operation specification table 1152 was inserted. Determine. Therefore, the block number of the next fourth operation macro remains unchanged at 3, and the block number of the newly inserted macro AD is displayed as 2A.

Next, if you want to add one input to block 3 in Fig. 10, move the cursor to block 3 as shown in Fig. 12, and follow the operating procedure shown in Fig. 16. Obtain a block diagram like this. That is, a mark * is added to block number 3 to clearly indicate that it has been changed.

To do this, as shown in FIG. 18, the final address pointer address 2606 at the time the rewrite key was pressed is set to a predetermined address E0 as the final address before modification.
Store it in On the other hand, the rewritten start address 2603 of the calculation specification table 1152 is written to the third position in the calculation order table. The program that displays the block diagram on the CRT is the operation order table 11.
The contents of 51 are sequentially updated to the final address E0 (2606
2603 in the arithmetic specification table 1152.
Determine whether the macro OR specified by the address has been rewritten. However, since this was a rewriting instruction, the block number of the rewritten macro OR remains at 3. On the other hand, since the number of inputs has changed, to clearly indicate this, the macro symbol of block number 3 is displayed with an "*" mark as shown in FIG.

As the next example, if you want to delete the macro in block 1 in Figure 10 and change the input D003 of block 2 to D001, first move the cursor to block 1 and select "Delete" as shown in Figure 19. ” key, the block diagram of FIG. 20 is obtained. Then, move the cursor to block 2 as shown in Fig. 21, and follow the operating procedure shown in Fig. 22.
A desired block diagram as shown in FIG. 23 is obtained. That is, since block 1 has been deleted and the wire number of input 1 of block 2 has been changed, a mark * is attached to clearly indicate this fact.

The mechanism is as follows. That is, the second
As shown in Figure 4, “Delete” block 1.
When the key is pressed, the contents of the calculation order table 1151 corresponding to block 1 (in this case, the first 2618) are set to "0", and the contents of the calculation specification table 1152 of block 1 are all set to FFFF (hexadecimal).
Make it. Subsequently, when the "Rewrite" key shown in FIG. 22 is pressed, the address 2606 pointed to by the final address pointer EP is stored at a predetermined address E0 as the final address before modification.Meanwhile, the calculation of the rewritten block 2 is The specification table start address 2603 is written to the second position in the calculation order table 1151.
The program that displays the block diagram on the CRT sequentially reads the contents of the operation order table 1151.
Block 1 whose content is "0" is ignored and nothing is displayed, and block 2 whose content is at address 2603, which is younger than the final address before modification E0 (2606), indicates that some change has been made. In order to indicate this, a mark * is added and displayed as shown in Fig. 23.

As a final example, the output of block 1 in Figure 10
In order to make the negative input of D003 the input of block 2,
Let's talk about adding NOT (negation logic) to a macro. At this time, as shown in FIG. 25, first place the cursor on block 2 and press the "delete all" key to obtain the image shown in FIG. Next, press the "program creation" key and follow the operating procedure shown in FIG. 27 to obtain the block diagram shown in FIG. In other words, block number 2 has been newly added, block 3 has the input wire number of block 2 changed from D003 to D008, and block 4 is the same as block 3 before the change, but the program has been created again. As a result, each item is marked with a change mark *.

As shown in FIG. 29, this mechanism sets the contents of the operation order table 1151 corresponding to blocks 2 and 3 (in this case, 2612 and 2606, respectively) to "0" when the "delete all" key is pressed. (This condition is not shown). On the other hand, block 2,
All contents of the calculation specification table 1152 corresponding to 3 are set to FFFF (hexadecimal). Subsequently, when the "program creation" key shown in FIG. 27 is pressed, the address 2606 pointed to by the final address pointer EP is
is stored at a predetermined address E0 as the final address before modification, while the first address 2603 of the calculation specification table 1152 corresponding to each created macro,
Write 25FD and 25F7 to the operation order table 1151. The program that displays the block diagram on the CRT is
The contents of the calculation order table 1151 are sequentially checked, and the 28th Display with mark * as shown.

Note that the empty area of the calculation specification table 1152 after deleting the calculation macros shown in FIGS. 24 and 29 is stored by returning the final address pointer to 2618 when the deletion or batch deletion operation is completed.
If a key operation for creating a rewriting program (or inserting another one) is performed, this can be stored effectively as the final address before modification.

As is clear from the above description, according to the present invention, the connection section from one side of the screen to the other side via a predetermined input (first input, etc.) of each calculation symbol is
The topmost horizontal straight line is displayed in line with the other connections of each symbol, while the other connections are displayed with curved or vertical lines on the screen.
Even when there are many connections on the screen, the main parts of the sequence on the screen can be identified at a glance, making it easier to understand the sequence functions and connection relationships, and even monitor sequence operation. .

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an example of a control block diagram using calculation macro symbols, Fig. 2 is a diagram showing an example of the configuration of a programmable controller and a CRT interactive programmer, Fig. 3 is an explanatory diagram of the program configuration of the programmable controller, Figure 4 is an explanatory diagram of the control program, Figure 5 is an explanatory diagram showing an example of a logical connection diagram screen display, Figure 6 is an example of CRT screen division, and Figure 7 is a key-in operation of a calculation macro. Figure 8 is a diagram showing an example of the key-in operation for creating the control block diagram shown in Figure 1. Figure 9 is a diagram showing an example of operation macro change operation. Figure 10 is an example of program change. Figure 11 is a block diagram that serves as the basis for explaining the operation, Figure 11 is a configuration diagram of the operation order table and operation specification table corresponding to Figure 10, and Figures 12 to 14 show display examples when inserting operation macros. The block diagram, Fig. 15, is a configuration diagram of the calculation order table and calculation specification table corresponding to Fig. 14. Figs. 16 and 17 are block diagrams showing display examples when rewriting the calculation macro.
Figure 8 is a configuration diagram of the calculation order table and calculation specification table corresponding to Figure 17, Figures 19 to 23 are block diagrams showing display examples when the calculation macro is deleted and rewritten, and Figure 24 corresponds to Figure 23. Configuration diagram of the calculation order table and calculation specification table, No. 25
Figures 27 to 27 are block diagrams showing display examples when adding calculation macros, Figure 28 is a block diagram, and Figure 2
FIG. 9 is a configuration diagram of an operation order table and an operation specification table corresponding to FIG. 28. AND...and macro, OR...or macro,
1...Programmable controller, 2...
CRT interactive programmer, 1151...operation order table, 1152...operation specification table, EP
...Final address pointer, E0...Final address before modification.

Claims (1)

[Claims] 1. A logic operation program having a plurality of logic operation units including logic operation elements and their input/output addresses,
In a display device that displays a logic operation connection diagram drawn by operation symbols and connections on a screen by inputting or reading out the program, the operation symbols are determined in advance for each of the logic operation elements, and the operation symbols are determined in advance for each of the logic operation elements, and the operation symbols are determined in advance for each of the logic operation elements, and arithmetic symbol display means for displaying a corresponding arithmetic symbol on a screen according to a logical operation unit; and an arithmetic symbol display means for displaying a corresponding arithmetic symbol on a screen according to the logical operation unit; When connecting a plurality of arithmetic symbols displayed by the arithmetic symbol display means horizontally between output addresses, the predetermined output address of the arithmetic symbol placed in the previous stage on the screen is connected to the predetermined output address of the arithmetic symbol placed in the subsequent stage. The calculation symbols are connected by horizontal straight lines so as to have a predetermined input address, and the calculation symbols in the previous stage having the same predetermined input address as the predetermined input address on the one side are connected horizontally. A connection is displayed by a straight line, and a connection is displayed by a horizontal straight line between a subsequent calculation symbol having the same predetermined output address as the predetermined output address on the other side and a predetermined output address on the other side, and A logical connection diagram display device comprising: a connection means for displaying a connection of another input address by bending it so as not to overlap an existing operation symbol on the screen when there is another input address. 2. Claim 1 is characterized in that the predetermined input address is defined in a predetermined input order, such as the first input, among the input addresses of the logical operation unit to which the operation symbol corresponds. Logical connection diagram display device. 3. The logical connection diagram display device according to claim 1, wherein the connection of the predetermined input address is displayed in a predetermined positional relationship, such as at the top, with respect to the connection of the other input address of the calculation symbol. . 4. The logical connection diagram display device according to claim 1, wherein each of the horizontal straight lines connecting and displaying the predetermined input addresses are displayed in conjunction on the screen. 5. The logical connection diagram display device according to claim 4, wherein the linked display displays the horizontal straight line at the top with respect to other connections of the calculation symbol. 6. The logical connection diagram display device according to claim 4, wherein the linked display displays each of the horizontal straight lines in a straight line on the screen.