JPS62247409A - Program maintenance device for process controller - Google Patents

Abstract

PURPOSE:To simplify the constitution of a storage device by providing only a control arithmetic program and a revision number table needed for control arithmetic to the storage device of a controller after preparing a loop control table. CONSTITUTION:A process controller 100 contains a transmission bus 101, controllers 1021-102n and a transmission interface controller 103. The controllers include the transmission processing parts 11-1n which perform transmission of data among said controllers as well as between the controller 103 and the controllers 1021-102n with identification of ports No 21-2n, the executing programs 41-4n, a revision number table which stores the change history information on a control arithmetic program for revision control, and the arithmetic execution processing parts 51-5n which carry out the control arithmetic based on those tables 31-3n and 41-4n.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a program maintenance device for a process control device, and is a distributed process in which control calculation logic is described in the form of calculation macros and these are displayed in a control block diagram. ◎ Related to a program maintenance device suitable for a control device [Prior art] Conventionally, a control calculation program is processed using calculation macros (AND, OR, proportional/integral/differential, function generation, etc.).

In process control equipment, programs that constitute one functional block or unit by themselves are written by combining them in a building block format.

111. Improving the visibility of the control program.

and (2) to enable even people without computer knowledge to create and modify control calculation programs.

For purposes such as creating and changing a control calculation program while drawing a control block diagram on the CR7 screen using a CRT display and keyboard, there is also a function to create and change the control calculation program on the same screen as when creating and changing the control calculation program. A program maintenance device with a display function is used (
Patent application No. 55-119755, No. 57-109959
0) These program maintenance devices provide the screen identification information necessary to display the control calculation program as a control block diagram on a CRT, as well as the calculation macro name, input/output signal point number, etc. for each screen. is input from the keyboard to create a display information table that stores the screen identification information of the control fl[X program and the number and order of calculation macros to be displayed for each @ screen, and then displays these in the control block. The method used is to create a control calculation program and check the results of the changes by inversely changing the data into a diagram and displaying it on a CRT.

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

When displaying the control calculation program as a control block diagram, the program maintenance device reads out all of the above information and control calculation program from the Todoroki controller into its storage device, and from the screen identification information and display information table, v
iim+c Set the number and order of blocks to be displayed by 1&! Intimidate,
A method is used to draw a control block diagram while decoding the control calculation program and identifying the boundaries between calculation macros.

[Problem that the invention seeks to solve]

According to the above conventional method, there were the following drawbacks: (1) The IIi plane identification information and display information table, which are required only for displaying the control block diagram, are stored in the controller's storage device. (2) In order to display the controller's control calculation program in a control block diagram, the controller needs an extra storage device.
, flj-controlled calculation programs are overflowing into program maintenance equipment.For this reason, in distributed process control equipment, etc., where multiple controllers are connected to a common transmission bus.

In a system in which a program maintenance device is connected to a common transmission bus for maintenance, it takes time to transfer the program, and control operations may be hindered due to the exclusive use of the transmission bus.

In fact, so as not to interfere with the control operation.

Because the program is divided and transferred little by little, it takes extra time to transfer the entire program to the program maintenance device.Therefore, it takes time before the control block diagram is displayed. (3) This is because when displaying a control block diagram with a program maintenance device, the control calculation program is checked to identify the boundaries between calculation macros.

It takes time to decode the program, and as a result, it takes time to display the control block diagram. [Means for solving the problem] The above problem is solved by the following. Ru.

(1) In addition to the control calculation program, the program maintenance device is equipped with a program that corresponds to the controller to be maintained.
The control calculation program is divided into sheets that are a combination of a loop management table for managing divisions (loops) corresponding to calculation execution cycle divisions, loop numbers (loop positive), and divisions into which the loops are further subdivided. Loop management table and see) tl! The information table, the above-mentioned program, the revisiting hidden table for determining the history, and the controller identification code (controller) are all stored as one set.

(2) Only the control calculation program necessary for each control calculation and the above-mentioned revisit table are stored in the storage device of the controller.

(3) In the program maintenance device, an expansion processing table containing the expansion specifications of the control calculation program image, the number of input/output signal points, the type of input/output signals, and operation macro symbol information is provided in accordance with the operation macros supported by the device. Store in advance (4) The loop management table in (1) above stores the start address of each loop of the control calculation program.

(5) The sheet information management table in (1) above stores the number of seats, sheet ugliness, the start address of the control calculation program for each sheet group, the size of the sheet, and the hidden code of the calculation macro.

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

[Effect]

(Since the storage device of the No. 11 controller only has the control calculation program and review table necessary for control calculations, the controller does not need an extra storage device.

(2) When displaying a control calculation program of a controller in a control block diagram, only the revisit table from the corresponding controller is read out to the program maintenance device, and the contents of the revisit table stored in the program maintenance device are read out. If the contents match each other, display processing is performed based on the control calculation program, loop management table, sheet management information table, and expanded form processing table stored in the program maintenance device. The transmission time can be reduced and the control block diagram can be displayed quickly. (3) In the display process of the control block diagram, the expansion processing table is β-referenced to determine the delimiter of the calculation macro of the execution program. ,
Since the expansion pattern can be easily determined, the execution program of each calculation macro can be quickly displayed as a calculation macro symbol.

〔Example〕

Hereinafter, one row A of the present invention will be explained with reference to Fig. 1. This figure shows a process control device 100 in which the present invention is applied to a fractional type process il+'lj# device.A process control device 100 includes a transmission bus 101 and a controller connected thereto. ~102□.

Consists of a transmission interface controller 103,
On the other hand, the program maintenance device 200 has a maintenance device main body 20.
1. It is composed of a CRT display device 202 and a keyboard 203.

Controller 102. Data transmission between ~l 02n and the program maintenance device 200 takes place via the transmission bus lO1, the transmission interface controller 103° and the communication linkage 104.

The controllers 1021 to IO2,1 are transmission processing units 1 that perform hidden data transmission between the controllers and between these controllers and the transmission interface controller 103 by identifying ports 2 and 21m.

~10, calculation execution management tables 31 to 3n indicating control calculation programs, execution programs 41 to 4a, and a revisiting error table for use in revisiting table 1f that stores change history information of control calculation programs.

The control calculations are executed in the above calculation table 3. ~3n and execution program 4. .about.4n.

In addition to the transmission processing unit similar to the above controller, the transmission interface controller 103 transmits data received by the transmission processing unit 10 to the communication linkage 104, and vice versa.
It has a communication processing section 16 that transmits the received data from 4 to a transmission processing section LO.

Next, the maintenance device main body 201 is made up of items (a) to (1).

(a) Each controller 102 described above. ~1o2n boat m2. ~2, corresponding to l to l. Controller floor tables 7I to 71a (CI) each controller 102. which is the identification code of the controller. -Arithmetic execution management table 23. which is the same as that used in 102n. ~2
311, execution program 24. ~24n and revisitable magnetic table 26. ~26n.

e→ Loop management table for managing the execution program in division (loop) units corresponding to the control calculation cycle in the controller 8. ~8□.

2) Sheet information management table 91 for classifying the execution program by associating the loop number (loop floor) and the division (sheet) floor obtained by subdividing the loop with the sheet floor that combines the hail code. 911I.

(e) Communication processing unit 1O0 (to) each 81 that performs data communication processing between the maintenance device main body 201 and the process control device 100
Operation macro machine language expansion specifications, number of input/output signal points, type,
It has a built-in expansion escape table that includes information such as macro names and macro display symbols, and executes the execution program 24. based on the various tables and execution programs mentioned above. A control block diagram display processing unit 11 performs processing for displaying .about.24fi in a control block diagram on the CRT display device 202.

A compile processing unit 12° that creates or changes an executable program; (g) a collation processing unit 13° that checks the revisiting unit stored in the main body 201 of the maintenance device against that stored in the controller number; The operation of the invention will be described below with reference to FIG. 1, taking as an example the case where the controller 102n is the object.

First, the operation when creating a new control calculation program for the controller IO2,1 will be described.

From the keyboard 203, first, the controller, the number of calculation loops, and the number of each loop (loop floor).

Activation permission condition for each calculation loop 1 cycle Activation condition (periodic activation timing instruction information storage address) 1 period.

Data such as the execution program size of each loop is entered into the compile processing section 12 by key.

Based on these inputs, the compile processing unit 12 creates a loop (address) management table 8n for storing the start address of the execution program of each loop, and a table for storing various start conditions such as the number of loops and start cycle, and the loop start address. The calculation execution management table 23n is created.

Next, for each loop registered above, by key-inputting the seat size and execution program size of each sheet, the number of sheets and seat floor of the loop can be determined.

A sheet information table 9n is created to store the start address of the execution program and the execution program size for each sheet.

After preparing on μ, key-in the controller floor and sheet positive, and input data for the required number of calculation macros, including the calculation macro name, input signal point number, and output signal point number as one set. Execution program 24. Every time one meter of operation macros is input, the control block diagram display processing unit 11 creates the loop management table 81, the sheet information management table 9n, the operation execution management table 231t, and the execution program 24. On the basis of the.

A control block diagram is automatically created and displayed on the CRT display device 202 (see Figure 4).In order to initially load the control calculation program created above into the controller l02n,
Input controller-related data and transmission commands to the communication processing unit 10 from the keyboard 203.The communication processing unit 10:
In response to the input, the calculation execution management table 23Q, the execution program 24n, and the revisiting table 26.
The port information obtained by converting the controller magnetic field is added to the contents of the controller, and these data are sent to the communication linkage 104.
and transmits it to the transmission interface controller 103.

The transmission interface controller 103 receives the above data with its communication processing unit 16, and sends it out onto the transmission bus 101 by the transmission processing unit 10.・Each controller 102
1 to l 02fI, only the part corresponding to the port number is received all at once, but the data part (in this case, the revisit code, the calculation execution management table, and the execution program) is received by the controller l with the specified port m. Q2fi
At this point, the control calculation program of the controller 102° and the one stored in the main body 201 of the maintenance device match. This can be represented by the fact that the contents of the non-visible tables 6n and 26fi on both sides are the same.

Next, the controller 102 is created as described above.
The operation of the control calculation program stored in the CRT display device 202 to display the 1111 block cause as shown in FIG. 4 will be described.

When controller data is keyed in from the keyboard 203, the communication processing unit 10 sends a revisit hidden transmission request to the controller 102f via the transmission interface controller 103, adding the port number of the corresponding controller.
Send to l.

In response to the revisit hidden transmission request, the controller 102fi attaches the contents of the revisit table 61 and the port floor code of the transmission interface controller 103 and sends them to the transmission path. Transmission interface controller 10
3 receives the above data and transmits it to the maintenance apparatus main body 201 via the communication processing section 16.

Of the data received in the communication process 11 $10, the data in the revisit trout table 6 is stored in the maintenance device main body 201.
The contents of the display table 261 are compared with those stored in the display table 261.
1 uses the loop management table 8n, sheet information management table 9fi, calculation execution management table 23n, and execution program 24° stored in the maintenance device main body 201 based on the sheet input entered from the keyboard 203.
Display the control block diagram corresponding to sheet Na on the RT display device 202. If a discrepancy occurs in the above revisit verification,
A message indicating a discrepancy is displayed on the CRT display device 202, and subsequent processing is canceled.

As mentioned above, the reasons why the controller-side navigation table 6n and the maintenance device main body 201-side navigation table 26n become inconsistent are: (1) when creating a new control calculation program; , (2) This is a case where this is corrected or changed.

In these cases, it is a matter of course that the operator determines whether or not to transmit the control calculation program on the maintenance device main body side to each controller side, and processes are performed accordingly.

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

The calculation execution processing program 5 is periodically started by a timer, refers to the calculation execution I#Riko table, and searches for a loop in which the NA motion condition is @1m.

If the periodic activation condition is 11' (this is the case for the first loop in Figure 2), the start address (in this example, the first loop) of the corresponding loop in the execution program 4 is
In the figure, the program jumps to step 1) and executes the execution program. After the processing is completed, the process returns to the calculation execution processing program 5.

Below are the registered loops! ! The same process is repeated 1n times.

In order to display the execution program of each loop on the CRT, as shown in the enlarged view of Fig.
, and each sheet is further divided into two sheets.
As shown in enlarged view 4B of the figure, it is composed of machine language expanded forms of the 1st to tth operation macros.

FIG. 3 shows an example of a method for displaying a control block diagram of a control calculation program in the program preservation device 200. In this example, from the keyboard, select r from the keyboard.
The processing flow when keying in as shown in 0301J is shown.

First, search the sheet positive table in the sheet information management table 9 from the beginning in the order of 1st sheet information, 2nd sheet information/song, etc.) 1m input card data r 03101
Compare and check J with the loop ugliness/loop in-loop C) Nu stored in the sheet table.

And if the match matches, the loop rank is.

Let's see what number of young people will rank in the ranking (see No. 1).

In the case of Table 1, the loop number is 3, which is 2-J & 1.
：Iha City-IIF 浫 空φ1 りょう J△ツＡ庴 No. 1 --
6. Look up the second loop start address in the management table 8.
Next, the conductor in which the execution program corresponding to sheet 1mr0301J is stored is set to the above second loop start address and the execution program address CI in the second sheet information.
*Relative address from the start address of the loop) ・On the other hand, in the calculation macro table, each calculation macro belonging to each sheet Inζ is stored in the first sheet, second sheet, etc. , the number of words in the expanded form (the number of words in the machine language image) and the macromagnetic code (type code of the operation macro) are paired and Macro...I
I'). Further, the number of storage calculation blocks for each sheet is registered as the number of registered blocks in each sheet information group field of the sheet Na table.

Therefore, the 111th operation Macati of the second sheet information
, on the sheet storage table 9M1S no h Since the number of small daybug blocks is N, the calculation macro positive table (N,
+1) It can be seen that it corresponds to the m-th one. This (N,
+1)th content, number of expanded words -5. It turns out that it is macro yang-2.

By the way, in the calculation macro name table, the macro Nil
, 1m2..., each macro's macro name (name at key input), display macro name (name in block symbol disaster), and address of the opening processing table (defining the machine language pattern) is stored. In this example, the macromagnetic value is 2.

By referring to the contents of macro pigeon 2 in the operation macro name table, we can see that this operation macro is an input DD (adder), and its Hojiki name is input DD. The first address is known.

The expansion processing table is as shown in Figure 3 (Part 2).
If the off''X macro used to recognize the pattern of the machine ha expansion form of each operation macro is a human DD, in this example The storage start address of the shape table (skeletal data of machine language patterns) is.

Stored in the first two words. Note that the configuration of this 27-code is the same for other calculation macros.

The number of words after the third word differs for each calculation macro because the total number of input/output points differs depending on the type of calculation macro. In the case of the macro-input DD shown in Figure 3 (Part 2), the 3rd and 4th words are (1) +3 and +4 of the macro expanded form (execution program) are AC analog) type signals, respectively. l.

The fifth word S and (2) indicate that the expanded form S2 is also a human (analog) type signal and corresponds to the output point number.

To summarize the above, from the calculation macro name table, sheet m
It turns out that the first tuna of r03QIJ is Iru DD,
From the loop management table and sheet m table, as the sum of the start address of the second loop and the execution program address of sheet r0301J,
01 The start address of the execution program of J, that is, the first
The address of the macro can be found. Also, from the calculation macro table, the address of the first macro input DD can be found! ! It turns out that there are 5 words in open form.

Therefore, from the execution program, the sheet r0301J
It is possible to extract 5 words of the Ig1 calculation macro, and for each of these 5 words.

From the contents of the expansion processing table mentioned above, it is possible to recognize which part shows the example. In other words, as shown in Figure 3 (Part 2), the expanded form of the first operation macro (person DD) For +2, the person who indicates the analog signal is added as a code and output signal person 003, and for S3 and 4, the person who shows the analog signal is similarly added as the code, and respectively input 1 - person 001 ° input 2 - person 002 Recognizable.

Next, the above 5 words φ0. ÷1 Check whether the content of the word definitely belongs to the person DD by using the ◆0.
◆Check against the contents of l.

Based on the above results, as for display processing.

B) Add the ADD symbol and name (input DD) to the operation macro.

(q Honorary title (Ol) for being the first block, f9
With reference to the inputs h, 2z and the output point numbers AOO1, person 002, person 003, a control block diagram as shown at the right end of FIG. 3 (part 2) can be displayed.

For other types of arithmetic macros, by repeating the same processing procedure as described above, a control block diagram as shown in FIG. 4 can be sent to the cathode ray tube.

〔Effect of the invention〕

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

In addition, since the amount of data and transmission time between each controller and the program maintenance device can be reduced, restrictions and model numbers that affect the original control operations of each controller can be almost completely eliminated.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the overall configuration of a process*tta device and a program maintenance device according to an example of the present invention, and FIG. 2 is a conceptual diagram for explaining a controller control calculation execution processing method according to the present invention. FIG. 3 is a conceptual diagram for explaining an example of a method of displaying a control block diagram, and FIG. 4 is a schematic diagram showing an example of displaying the image 11a according to the present invention. 100... Process control device, 200... Program maintenance device, 201... (Program) maintenance device body, 202... CRT display device % 203... Keyboard % 3. ~3°, 23□~23n...Arithmetic execution management table, 4. ~4n, 24~241...Execution program, 6I~6flj26+~26n...
・91217th floor table, 81~8n...Loop IF processing table. 91~9,...Sheet pleasure Ttj table, 11.
... Control block diagram display processing section, 13... Verification processing section. 17... Expanded form processing table representative patent attorney Hiraki Kento Nbo;
a\;

Claims (5)

[Claims] (1) Each operation executes control calculations by writing the control calculation logic in a calculation macro, storing the control calculation program converted into machine language in advance in a storage device, and reading and executing these programs one by one. Execution processing means (5_1
~5_n) and means (4) for storing the control calculation program.
_1 to 4_n) and a first revision number that stores change history information of the control calculation program. Table (6_1~
6_n) and transmission processing means (1_1 to 1_n) that perform data transmission processing between each other and other controllers (102_1 to 102_n).
A program maintenance device for a process control device (100), which is connected to a common transmission network (101), and the transmission network includes a transmission processing means (1_n) for performing data transmission processing with the controller. a keyboard (203) that is connected via a transmission interface (103) with which data necessary for creating, modifying, and displaying control calculation programs for each of the above controllers is input;
, a CRT display device (202) for displaying the control calculation program as a control block diagram, and a maintenance device main body (201) that controls these devices and manages the creation, modification, and display processing of the control calculation program. The main body of the maintenance device includes: a sheet information management table (9_1 to 9_n) provided corresponding to each controller and storing data necessary for displaying a control calculation program as a control block diagram on a CRT device; , a control that creates and changes a control calculation program based on the input from the keyboard and the stored contents of the sheet information management table, and calculates and outputs the data necessary to display the control calculation program on the CRT device as a control block diagram. Block diagram display processing device (11)
and means (24_1 to 24_n) for storing the control calculation program obtained by the control block diagram display processing device; and a second revision for storing change history information of the control calculation program obtained by the control block diagram display processing device. No. Tables (26_1 to 26_n) and the first revision number. Means for receiving table contents (10
, 104) and the first and second revision numbers. 1. A program maintenance device for a process control device, comprising a verification processing device (13) that compares and verifies the contents of a table. (2) Sheet information management table (9) includes a calculation macro name table, calculation macro No. table and sheet N
o. A program maintenance device for a process control device according to claim 1, characterized in that the device includes a table. (3) A program maintenance device for a process control device according to claim 2, wherein the operation macro name table is composed of the following data. (a) Number of calculation macros: Number of types of calculation macros that can be supported by the program maintenance device (b) The following macro attribute data determined for each macro (a) Macro name (b) Blocking the macro Macro name for diagram display (c) Storage start address of expansion processing table (4) Operation macro No. 3. A program maintenance device for a process control device according to claim 2, wherein the table is composed of the following data. (a) Number of calculation macros: Total number of calculation macros stored in the controller (b) Number of words in expanded form: Number of words when calculation macros are expanded into machine language (c) Macros No. ...The number of the macro attribute data registered in the calculation macro name table in the order of registration, that is, the identification code number corresponding to the macro. (5) Sheet No. 3. A program maintenance device for a process control device according to claim 2, wherein the table is composed of the following data. (a) Number of sheets: Total number of sheets stored in the controller (b) The following sheet information data determined for each sheet: (a) Loop No. ...Number assigned to the calculation group executed by the controller (b) In-loop sheet No. ... Sheet No. numbered within each loop. (c) Execution program address: Execution program start address of the first macro among calculation macros belonging to the sheet (d) Sheet size: Execution program for each sheet assigned to each sheet Size of memory area that can be created (number of words) (e) Free area size...The size of the created execution program is subtracted from the sheet size above, and the remaining capacity that can be used to create an execution program (number of words) (f) Number of registered blocks: Number of registered calculation blocks for each sheet