JPH0679252B2 - Program maintenance equipment for process control equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a program maintenance device for a process control device, and in particular, a distributed process control in which control operation logic is described by an operation macro and is displayed in a control block diagram. The present invention relates to a program maintenance device suitable for a device.

[Conventional technology]

Conventionally, a control calculation program is used as a calculation macro (AND, OR, proportional / integral / derivative, functional relation, etc.
In a process control device that uses a method that describes a combination of two functional blocks or programs that constitute a unit) in a building block method, (1) improve the visibility of the control program, and (2) create a control calculation program, For the purpose of making corrections possible even for people who do not have knowledge of computers, using the CRT display device and keyboard, create and change the control calculation program while drawing the control block diagram on the CRT screen. A program maintenance device is used that has the function of displaying and displaying the same screen as when the control calculation program is created or changed (Japanese Patent Application No. 55).
-119755, 57-109959, etc.).

In these program maintenance devices, the screen identification information necessary to display the control calculation program on the CRT as a control block diagram is displayed, the calculation macro name for each screen, the input / output signal point number, etc. are input from the keyboard. In addition to the control calculation program, create a display information table that stores the screen identification information and the number of calculation macros that should be displayed for each screen and the order, etc.
The method of displaying on T and confirming the result of creating and changing the control calculation program is adopted.

On the other hand, in the storage device of the controller connected to the microprocessor via the interface, in addition to the control calculation program, information such as the above-mentioned screen identification information and display information table is stored.

When the control calculation program is displayed in the control block diagram, the program maintenance device reads out all the information and the control calculation program from the corresponding controller to the storage device and displays it on the screen from the screen identification information and the display information table. The control block diagram is drawn while recognizing the number and order of blocks, deciphering the control operation program and identifying the delimiters of the operation macro.

[Problems to be Solved by the Invention] According to the above conventional method, there are the following drawbacks.

(1) Since the screen identification information and the display information table, which are required only for displaying the control block diagram, are stored in the storage device of the controller, an extra storage device is required for the controller.

(2) In order to display the control calculation program of the controller in the control block diagram, all the control calculation blocks are read from the controller to the program maintenance device each time.

For this reason, it takes time to transfer the program in a system such as a distributed process control device that connects multiple controllers to a common transmission bus to connect and maintain a program maintenance device on the common transmission bus. The exclusive use of the transmission bus may hinder the control operation.

Actually, since the program is divided and transferred little by little so as not to hinder the control operation, it takes extra time to transfer the entire program to the program maintenance device, and therefore the control block It takes time to display the figure.

(3) When the control block diagram is displayed on the program maintenance device, it takes a time to decipher the program because the control operation program is deciphered and the delimiter of the operation macro is identified. It takes time to display the figure.

[Means for solving problems]

The above problems can be solved by the following in the present invention.

(1) In the program maintenance device, in addition to the control calculation program, in addition to the control calculation program, a loop management table for managing the division (loop) corresponding to the calculation execution cycle division Loop number (Loop No.) and division No. that further subdivides the loop.
A loop management table and a sheet management information table for managing in units of sheets that combine and, and revision N for managing the history of changes in the above programs and tables
O. The table and the identification code (controller No.) of the corresponding controller are all stored as one set.

(2) Only the control calculation program necessary for each control calculation and the above revision No. table are stored in the memory device of the controller.

(3) In the program maintenance device, the expansion processing table including the expansion specification of the control operation program image, the number of input / output signal points, the type of input / output signal, and the operation macro symbol information is provided corresponding to the operation macro supported by the device. Store in advance.

(4) The loop management table of (1) above stores the start address of each loop of the control calculation program.

(5) In the sheet information management table of (1) above, the number of sheets, the sheet number, the start address of the control calculation program for each sheet number, the size of the sheet, the code number of the calculation macro.
To store.

(6) A means for comparing and collating the contents of the revision number table stored in the controller with the contents of the revision number table stored in the main body of the program maintenance device is provided.

[Action]

(1) Since the storage device of the controller has only the control operation program and the revision No. table necessary for the control operation, the controller does not need an extra storage device.

(2) When displaying the control calculation program of the controller in the control block diagram, only the revision No. table is read from the corresponding controller to the program maintenance unit and the revision No. stored in the program maintenance unit is read.
When the contents of the table are compared and collated, and these contents match each other, display processing is performed based on the control calculation program, the loop management table, the sheet management information table, and the expansion processing table stored in the program maintenance device. Therefore, the data transmission time can be shortened and the control block diagram can be displayed quickly.

(3) In the control processing of the control block diagram, by referring to the expansion type processing table, it is possible to easily determine the division and expansion pattern of the operation macro of the execution program. It can be displayed with a macro symbol.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. This figure shows an example in which the present invention is applied to a distributed process controller.

The process control device 100 includes a transmission bus 101, controllers 102 _{1 to} 102 _n connected to the transmission bus 101, and a transmission interface controller 103, while the program maintenance device 200 includes a maintenance device main body 201, a CRT display device 202, and a keyboard. It consists of 203.

Data transmission between the controllers 102 _{1 to} 102 _n and the program maintenance device 200 is performed via the transmission bus 101, the transmission interface controller 103, and the communication linkage 104.

The controllers 102 _{1 to} 102 _n perform transmission of data between the controllers and between them and the transmission interface controller 103 by identifying the port Nos. 2 ₁ to 2 _n, and the transmission processing units 11 ₁ to 1 _n . Calculation execution management tables 3 _{1 to} 3 _n indicating control calculation programs and execution 4 ₁
~ 4 _n , revision _No. table for revision management that stores change history information of control operation program, and control operation is executed based on the above operation execution management tables 3 _{1 to} 3 _n and execution programs 4 ₁ to 4 _n. Operation execution processing unit 5 ₁
.About.5 _n .

Transmission interface controller 103, the controller and the same transmission processing section 1 _0, in addition to the transmission port NO.2 _0,
Communication data received by the transmission processing unit 1 ₀ linkage 104
Or transmit the received data from the communication linkage 104 in reverse has a communication processing section 16 to pass to the transmission processing section 1 _0.

Next, the maintenance device main body 201 is composed of the following (a) to (h).

(B) Port No. 2 of each controller 102 _{1 to} 102 _n described above
Corresponding to ₁ to 2 _n and 1-to-1, which is an identification code of the controller controller NO. Table 7 ₁ to _7-n.

(B) the controller 102 _1-102 same execution as stored in the _n management tables 23 ₁ ~ 23 _n, the execution program 24 ₁ to 24 _n and revision NO. Table 26 ₁ ~ 26 _n.

(C) Loop management tables 8 ₁ to 8 _n for managing the execution program in units of division (loop) corresponding to the control calculation cycle in the controller.

(D) Sheet information management table for classifying the execution program in correspondence with the sheet No. which is a combination of codes representing the loop number (loop No.) and the subdivision (sheet) NO. 9 _{1 to} 9 _n .

(E) A communication processing unit 10 that performs data communication processing between the maintenance device main body 201 and the process control device 100.

(F) Built-in expansion processing table containing information such as machine language expansion specifications of various operation macros, number of input / output signals, type, macro name, macro display symbol, etc., and execution program based on the above various tables and execution programs 24 ₁ ~ 24
_A control block diagram display processing unit 11 that performs a process of displaying _n on the CRT display device 202 in a control block diagram.

(G) The compile processing unit 12 that creates or changes the above-described various tables or execution programs based on programming input data from the keyboard 203.

(H) A collation processing unit 13 that performs collation check with the revision No. stored in the maintenance device main body 201 and that stored in the controller.

Next, the operation of the present invention will be described below with reference to FIG. 1 by taking the case of the controller 102 _n as an example.

First, the operation for creating a control operation program of the controller 102 _n new.

From the keyboard 203, first, the controller No., the number of calculation loops, the number of each loop (loop No.), the start permission condition of each calculation loop, the cycle start condition (cycle start timing instruction information storage address), the cycle, Data such as the size of the execution program is keyed into the compilation processing unit 12.

Based on these inputs, the compile processing unit 12 stores a loop (address) management table 8 _n that stores the start address of the execution program of each loop, various start conditions such as the number of loops and start cycles, and the loop start address. A calculation execution management table 23 _n for creating the calculation execution management table is created.

Next, for each loop registered above, by key inputting the sheet No. and the execution program size of each sheet, the number of sheets of the loop, the sheet No., the start address of the execution program of each sheet, the execution A sheet information management table 9 _n for storing the program size is created.

After making the above preparations, key in the controller No. and sheet No., and then enter the data for the number of required calculation macros with one set of calculation macro name, input signal point number, and output signal point number. , Create an execution program 24 _n .

Each time one set of calculation macros is input, the control block diagram display processing unit 11 controls the control block based on the loop management table 8 _n , sheet information management table 9 _n , calculation execution management table 23 _n, and execution program 24 _n. A figure is automatically created and displayed on the CRT display device 202 (see FIG. 4).

In _order to initially load the control calculation program created by the above procedure to the controller 102 _n , controller No. data and a transmission command are input from the keyboard 203 to the communication processing unit 10.

In response to the input, the communication processing unit 10 responds to the calculation execution management table 23 _n , the execution program 24 _n , and the revision number.
The contents of the table 26 _n, the controller NO. Adds port NO. Obtained by converting a transmission interface controller 103 put these data to the communication linkage 104
Send to.

Transmission interface controller 103 receives the data in the communication processing unit 16 is sent onto the transmission bus 101 by the transmission processing section 1 _0.

Each of the controllers 102 _{1 to} 102 _n simultaneously receives only the portion corresponding to the port _number , but the data section (in this case, the revision number, the operation execution management table and the execution program) receives the designated port number. Controller 102 having
Only _n receives and stores in the designated storage area.

At this point, the control calculation program of the controller 102 _{n and} the program stored in the maintenance device main body 201 match. This can be represented by the fact that the contents of both revision No. tables 6 _n and 26 _n are the same.

Then, the controller 102 _n created as described above.
The operation for causing the CRT display device 202 to display the control calculation program stored in the CRT display device 202 as shown in FIG. 4 will be described.

When the controller NO. Data is keyed in from the keyboard 203, the communication processing unit 10 transmits the revision NO. Transmission request to the controller 102 _n via the transmission interface controller 103, adding the port NO. Of the corresponding controller.

In response to the revision NO. Transmission request, the controller 102 _n sends the contents of the revision NO. Table 6 _n to the transmission bus with the port NO. Code of the transmission interface controller 103. The transmission interface controller 103 is
The above data is received and transmitted to the maintenance device main body 201 via the communication processing unit 16.

The revision of the data received by the communication processing unit 10.
The data of the NO. Table 6 _n is collated with the contents of the revision NO. Table 26 _n stored in the maintenance device main body 201.

If they match, the control block diagram display processing unit 11
Is based on the sheet number entered from the keyboard 203,
The loop management table 8 _n stored in the maintenance device main body 201,
Sheet information management table 9 _n , calculation execution management table 23
_n and the execution program 24 _n , the CRT display device 202
The control block diagram corresponding to the seat No. is displayed on.

If a mismatch occurs in the verification of the above revision numbers, a message indicating the mismatch is displayed on the CRT display device 202, and the subsequent processing is stopped.

As mentioned above, the revision No. on the controller side.
The table 6 _n and the revision No. table 26 _n on the maintenance device main body 201 side do not match when (1) a new control calculation program is created and (2) when this is modified or changed. .

In these cases, it is natural that the operator decides whether or not to transmit the control operation program on the maintenance device main body side to each controller side, and the processing according to this is performed.

FIG. 2 shows an example of the control calculation execution processing method of each controller 102.

The arithmetic execution processing program 5 is periodically activated by a timer and refers to the arithmetic execution management table 3. Then, a loop whose start permission condition is "1" is searched for.

If the cyclic start condition is "1" (the first loop is the same in FIG. 2), the start address (A1 in the figure) of the corresponding loop (first loop in this example) of the execution program 4 ) To execute the execution program.
After the processing is completed, the operation execution processing program 5 is returned to.

Hereinafter, similar processing is repeated for the registered loop number n.

The execution program of each loop is divided into the first to mth sheets as shown in the enlarged view 4A of FIG. 2 for displaying on the CRT, and each sheet is further enlarged in FIG. Figure 4B
As shown in FIG. 3, the machine language expansion form of the first to lth operation macros is used.

FIG. 3 shows an example of a control block diagram display method of the control calculation program in the program maintenance device 200. In this example, "030
The process flow for key-in like "1" is shown.

First, the sheet No. table in the sheet information management table 9 is searched from the beginning in the order of the first sheet information, the second sheet information, and the sheet No. input data “03/01” is set in the sheet No. table. It compares and collates with the stored loop No./sheet No. in the loop. Then, when the collation matches, the loop number is checked to see which number is in the lowest number order (see Table 1).

In the case of this example, the loop number is 3, which means that this corresponds to the second loop, so the loop management table 8
The second loop start address of is referred to. Next, the sheet
The address in which the execution program corresponding to NO. "0301" is stored is obtained as the sum of the second loop start address and the execution program address in the second sheet information (relative address from the start address of the loop). .

On the other hand, in the calculation macro No. table, the first sheet, the second
In the order of sheets, for each operation macro belonging to each sheet, the number of expanded words (the number of words in the machine language image) and the macro NO. Order (the first operation macro in machine language,
It is stored in the second calculation macro. The number of stored calculation blocks of each sheet is registered as the number of registered blocks for each sheet information group of the sheet No. table.

Therefore, the first operation macro of the second sheet information indicates that the number of registered blocks of the first sheet is N from the sheet No. table.
_Since it is ₁ , it can be seen that it corresponds to the (N ₁ +1) th _one of the operation macro _No. table. From this (N ₁ +1) th content, it can be seen that the number of expanded words = 5 and the macro NO. = 2.

By the way, in the calculation macro name table, macros NO.1 and NO.
The macro name of each macro (name at the time of key input), display macro name (name in block symbol display), and expansion processing table (define machine language pattern) address are stored in the order of 2 ... In this example, macro N
Since O. is 2, the macro number in the calculation macro name table is
By referring to the contents of item 2, this operation macro
(Adder), the display symbol is ADD, and the start address of the expansion processing table is also known.

The expansion processing table, as shown in FIG. 3 (2),
It is used to recognize the machine language expansion pattern of each arithmetic macro. When the operation macro is ADD, in this example the number of expanded words (= 5), the number of input / output points (= 3), and the storage start address of the expanded table (skeletal data of machine language pattern) are set to the first two words. It is stored. The two-word structure is the same for other operation macros.

The number of words after the third word differs for each operation macro because the total number of input / output points differs depending on the type of operation macro. In the case of the macro ADD shown in FIG. 3 (No. 2), the 3rd and 4th words are (1) Macro expansion type (execution program) # 3 and # 4 are A (analog) type signals. , The input 1 and 2 correspond to the point number, and (2) the fifth word indicates that the expanded type # 2 is also an A (analog) type signal and corresponds to the output point number.

To summarize the above, Sheet N from the calculation macro name table
It is found that the first macro of O. “301” is ADD, and from the loop management table and the sheet No. table, the sum of the start address of the second loop and the execution program address of the sheet “0301” is added to the sheet “0301”. The start address of the execution program, that is, the address of the first macro is known.
Also, from the operation macro No. table, it can be seen that the expanded form of the first macro ADD is 5 words.

Therefore, the first operation macro of 5 words of the sheet No. “0301” can be extracted from the execution program. Then, for these 5 words, it is possible to recognize which part shows what from the contents of the expansion processing table.

That is, as shown in FIG. 3 (No. 2), in the expanded type # 2 of the first operation macro (ADD), A indicating an analog signal is attached as a code to form an output signal A003, and regarding # 3 and # 4. Similarly, A indicating an analog signal is attached as a code and can be recognized as input 1 = A001 and input 2 = A002, respectively.

Next, the contents of # 0 and # 1 words of the above words are definitely
Whether it is ADD or not is checked by comparing it with the contents of # 0 and # 1 in the expanded table.

Based on the above results, as the display processing, (a) the symbol and name of ADD (ADD) in the operation macro, (b) the number of the first block (01), (c) input 1, 2 and By referring to the output point numbers A001, A002, A003, it is possible to control the control block diagram as shown at the right end of FIG. 3 (No. 2). For other types of operation macros, the control block diagram as shown in FIG. 4 can be displayed on the cathode ray tube by repeating the same processing procedure as described above.

〔The invention's effect〕

According to the present invention, the storage device of the controller that constitutes the process control device can be saved, and the control block diagram of the control calculation program can be displayed quickly.

Further, since the amount of transmission data and the transmission time between each controller and the program maintenance device can be reduced, there can be almost no restriction or influence on the original control operation of each controller.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of a process control device and a program maintenance device according to an embodiment of the present invention. FIG. 2 is a conceptual diagram for explaining a control calculation execution processing method of a controller according to the present invention. FIG. 4 is a conceptual diagram for explaining an example of a control block diagram display method, and FIG. 4 is a schematic diagram showing an example of a screen display according to the present invention. 100: Process control device, 200: Program maintenance device, 201: (Program) maintenance device main body, 202: CRT
Display device, 203 ... Keyboard, 3 _{1 to} 3 _n , 23 ₁ to 23 _n ...
Computation execution management table, 4 ₁ to 4 _n , 24 _{1 to} 24 _n ... Execution program, 6 _{1 to} 6 _n , 26 _{1 to} 26 _n ... Revision number table, 8 ₁ to 8 _n ... Loop management table , 9 ₁ ~9 _n ...
... Sheet information management table, 11 ... Control block diagram display processing unit, 13 ... Collation processing unit, 17 ... Expansion processing table

Claims (5)

[Claims] 1. A control calculation logic is described by a calculation macro, a control calculation program obtained by converting the control calculation logic into a machine language is stored in a storage device in advance, and the control calculation is executed by reading and executing the program at every moment. Calculation execution processing means (5 _{1 to} 5 _n ), means (4 ₁ to 4 _n ) for storing a control calculation program, and a first revision NO. Table (6 ₁ ) for storing change history information of the control calculation program. ~ 6 _n )
And a plurality of controllers (102 _{1 to} 102 _n ) each including a transmission processing means (1 ₁ to 1 _n ) for performing data transmission processing between each other and another controller, are connected to a common transmission network (101). a program maintenance device of the process control device (100) which is formed by, on the transmission network, through a transmission interface (103) having a transmission processing means (1 ₀₎ for performing data transmission processing between the controller A keyboard (203) which is connected and inputs data necessary for creating, modifying and displaying the control calculation program of each controller, a CRT display device (202) for displaying the control calculation program as a control block diagram, and these. Control various devices and create control calculation program,
The maintenance device main body (201) is responsible for change and display processing, and the maintenance device main body is provided corresponding to each controller and is necessary for displaying the control calculation program as a control block diagram on the CRT device. a sheet information management table for storing the data (9 ₁ ~9 _n), based on the stored contents of the input and the sheet information management table from the keyboard, to create a control operation program, together with the change, the control block diagram of this As a CRT
A control block diagram display processing device (11) for calculating and outputting data necessary for displaying on the device, and means (24 _{1 to} 24 _n ) for storing a control calculation program obtained by the control block diagram display processing device. , A second revision storing the change history information of the control calculation program obtained by the control block diagram display processing device
NO. A table (26 ₁ ~ 26 _n), said first revision NO. Means for receiving the contents of a table and (10,104), the matching process of comparing and collating the contents of the first and second revision NO. Table A program maintenance device for a process control device, comprising: a device (13). 2. The process control device according to claim 1, wherein the sheet information management table (9) includes a calculation macro name table, a calculation macro NO. Table, and a sheet NO. Table. Program maintenance device. 3. The process maintenance device of the process control device according to claim 2, wherein the calculation macro name table is composed of the following data. (B) Number of operation macros …… Number of operation macro types that can be supported by the program maintenance device (b) The following macro attribute data defined for each macro (a) Macro name (b) Macro block diagram display Macro name of (c) Storage start address of expansion processing table 4. The program maintenance device for a process control device according to claim 2, wherein the calculation macro No. table is composed of the following data. (B) Number of operation macros …… Total number of operation macros stored in the controller (b) Number of expanded words …… Number of words when the operation macros are expanded into machine language (c) Macro No. …… The above operation macro name The registration order number of the macro attribute data registered in the table, that is, the identification code No. corresponding to the macro. 5. The program maintenance device for a process control device according to claim 2, wherein the sheet No. table is composed of the following data. (A) Number of sheets: total number of sheets stored in the controller (b) Sheet information data below, which is determined for each sheet (a) Loop No .: Attached to the calculation group executed by the controller No. (b) Sheet No. in loop .. Sheet No. numbered in each loop. (C) Execution program address ........ Start address of execution program of the first macro among the operation macros belonging to the sheet (d) Sheet size ...... The size of the memory area (number of words) in which the execution program can be created for each sheet allocated to each sheet (e) Free area size ...... The size of the created execution program is subtracted from the above sheet size to execute Programmable remaining capacity (words) (f) Number of registered blocks …… Number of registered calculation blocks for each sheet