JPH04199330A - Engineering station - Google Patents

Abstract

PURPOSE:To perform online maintenance operation against data base construction including variable length data by generating a program unit changed and corrected by means of an online maintenance means referring to an address list means and arranging the identical address. CONSTITUTION:At the time of converting a source file edited to a compiler 24 into an object module, a message output means 27 performs the comparison with the size of the object module generated by the former compilation, and in the case that it is larger than that, a message notifying that is outputted. An address list means 28 equipped with a generator 25 prepares the name of the whole program unit in a data base file and a list holding the storage address. When a generation means 29 starts the generator 25, the data base is generated according to the list. Thus, the variable length data can be treated as the data whose address size is apparently fixed.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a CR as a man-machine interface.
TJ? ? The present invention relates to an engineering station that is equipped with an 'r-board, performs system construction and various engineering tasks, and loads programs and databases created there into a control station in charge of process control, for example.

More specifically, it is an engineering station that is applied to a distributed control system that is equipped with a control station that is in charge of process control, and that allows online maintenance of various programs and databases generated here.・Regarding stations.

<Prior Art> Distributed control systems were developed with the aim of distributing control and concentrating information, and are currently used for process control in all industries.

The engineering station, which is in charge of horizontal construction of the system and various engineering tasks, has a builder function for creating various databases, feedback control systems, or Siegen control systems. It also has an online maintenance function that allows you to make partial changes and corrections to various programs.

The conventional online maintenance function in this type of engineering station assumes that the size of each functional block to be changed or modified is fixed, and the function to be maintained is The storage addresses and sizes of the blocks are matched to ensure that changes to functional blocks within the database do not affect other parts.

<Problem to be solved by the invention> Recently, as the scope of application of distributed control systems has expanded,
In various manufacturing processes, there is a need to build a horizontal production system that can produce the required amount in a timely manner, and for this reason, there is a strong desire for an engineering station that can easily perform comprehensive engineering work. There is.

To this end, at least in various engineering operations, it is necessary to be able to change or modify, for example, control logic using a programming language online.

However, the traditional online maintenance function
As mentioned above, it is assumed that the size of each functional block to be changed or modified is fixed, so the size cannot be determined until you compile it, for example, like the compilation result of a programming language. It was not possible to perform online maintenance for ``languages'' for which the address to be incorporated could not be determined until generation.

The present invention has been made in view of these points, and it is possible to perform online processing for database files containing variable-length data, such as the compilation results of programming languages.
The purpose is to provide an engineering station where maintenance operations can be performed.

Means for Solving the Problems> The present invention for solving the problems described above comprises: an editor means for collecting m source files for each program unit; a compiler for converting the source files edited by the editor means into object modules; a generator for assembling object modules converted by a compiler into a database file; and online maintenance means for partially changing or correcting the database read from the database file using the editor means. The engineering link station compares the size of the program unit after changes and corrections by the online maintenance means with the size of the object module generated by the previous compilation, and tells the compiler to determine if the size is larger. If so, a message output means is provided to notify that fact, and an address list means is installed in the previous generator to save the name and storage address of each program unit incorporated in the database file, and an online maintenance means is used to make changes. It is constructed by providing a generation means for generating modified program units by referring to the address list means and arranging each program unit at the same address.

Functions> The editor means edits source files for each program based on input from the keyboard regarding various texts displayed on the CRT.

The compiler converts the edited source file into an object module. At this time, the message output means compares the size of the object module generated by the previous compilation, and if the size is larger, it notifies you of this fact. Outputs a notification message.

The address list means provided in the generator always creates a list holding the names of all installed program units and their storage addresses during generation.

Further, the generation means provided in the generator generates a database according to the list) when the generator is activated.

This allows variable-length data to be treated as data whose address size is apparently fixed.

<Example> Example #A of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. Here, a case where the method is applied to a distributed control system is illustrated.

In the figure, ENS is the engineering link station that is the subject of the present invention, and FC is the communication station 4M13S.
It is a control station connected to the Engineering Link station ENS via.

Here, the engineering station ENS horizontally builds various programs and databases to be executed by the control station PC, and loads them onto the control station FC side via the communication line BS, or sends them online ( It has functions such as performing maintenance on the control station (while the control station FC is executing control) and displaying the operating status of the control station.

The control station FC performs process control using the feedback control means 11 and the sequence control means 12 based on programs and databases loaded via the communication line BS.

At Engineering Station ENS, 21
is an editor means for editing the source file of each program unit, and is connected to the CRT 22, and is connected to the keyboard 23.
The system edits various texts in units of programs displayed on the CRT screen in response to instructions from the CRT screen.

24 is a compiler that converts the source file edited by the editor means 21 into an object module, and 25 is a generator that assembles the object modules converted by the compiler into a database file. Reference numeral 26 denotes online maintenance means for partially changing and correcting the database read from the database file using the editor means 21. Changes and corrections are performed using the keyboard 23 and the like.

The compiler 24 includes an online maintenance means 2
The message output means 27 compares the size of the program unit after changes and corrections in step 6 with the size of the object module generated by the previous compilation, and if the size is larger than the size, the message output means 27 notifies the user to that effect. It is provided.

The generator 25 also includes an address list 28 for storing the name of each program unit incorporated in the database file and its storage address, and an address list 28 for storing the name of each program unit incorporated in the database file, and an address list for storing the program unit changed or corrected by the online maintenance means 26. With reference to list means 28,
A generation means 29 is provided which arranges each program unit at the same address and generates it.

30 is a communication means that loads programs and databases onto the control station FC and collects various data from the control station PC. In addition,
An operator station is connected to the communication line BS, which functions as a man-machine interface with the operator and monitors and gives instructions for controlling the process.

The operation of the device configured in this way will be described next.

2 is a conceptual diagram showing a variable length database in the engineering station EMS. In this case, the address “1000” of the database is “A”.
An object module indicated by "1" is stored, and an object module indicated by "C1" is stored at address "r1200".

The address list means 28 in the generator 25 is such an object module rAIJ.

When generating "C1" and incorporating it into the database file, an address list as shown in FIG. 3 is created.

Figure 4 is a conceptual diagram of the operation when performing online maintenance operations on such a database.
The figure is a flowchart showing the procedure of online maintenance.

In this example, as shown in FIG. 4(a), it is assumed that a change/correction is made to insert object module "B1" between object modules "A1" and "C1".

First, the online maintainer 26 is activated. Then, from the database file, the database to be maintained is called up on the CR7 screen and displayed (step 1).

In this case, the databases rAIJ, rC1 are called.

Subsequently, the operator uses the editor means 21 to edit the object module "A, 1. J, 'C1, J
[Create a database corresponding to BlJ in program units. Furthermore, the contents of the object modules rA, IJ, IC1, and J are also changed and modified as necessary. As a result, the source file of each program unit is edited (step 2.3).

When the editor work is completed, the source files for each program unit are converted into object modules via the compiler 24 (step 4).

Here, the message output means 27 provided in the compiler 24 converts the source file into an object module, and then compares its size with the previous object module (step 5). If the size of the object module is larger than the size before modification or modification, the operator is notified of an error. Then, the object module is not generated (step 9), thereby preventing a situation in which the size of the compilation result does not match before and after the maintenance work. Note that if the size becomes smaller, a dummy area is added. Furthermore, a dummy area may be reserved in advance at the time of first compilation (when not online) to allow a slight increase in size due to changes.

In step 5, if the size is small, the generator 25 is activated (step 6). At this time, the generation means 29 in the generator 25 refers to the address list shown in FIG. 4. As shown in FIG. 4(b), the program units with each name given to each program unit are stored at the same address. That is, program unit rAIJ
is address '1000 J, 10g unit 'C1
” are respectively placed at address r1200J.

Furthermore, the newly added program unit "B1" is placed at address ' ], 500 J. In this way, all data are assembled into one database file (step 7).

During this generation, the address list means 28 in the generator 25 stores the names "A1", "rcl", "rBl", and "rBl" of all the program units incorporated in the data file.
. . , and their storage addresses are created as shown in FIG. 4(C) and prepared for the next generation (step 8).

By performing such operations, it is possible to prevent addresses from being lost before and after online maintenance, and it is possible to perform online maintenance of variable-length databases without affecting the control operations being executed. can.

Note that in the above embodiment, it was assumed that the engineering station with this naked online maintenance function was configured separately from the operator station, but such engineering function could be configured separately from the operator station.
It may also be kept within the station.

<Effects of the Invention> As described in detail above, the present invention provides an engineering station that can perform online maintenance operations on database structures containing variable-length data, such as compilation results of programming languages. can do.

[Brief explanation of the drawing]

FIG. 1 is a configuration block diagram showing one embodiment of the present invention, and FIG.
The figure is a conceptual diagram showing a variable length database at the engineering station, Figure 3 is a conceptual diagram of the address list created when incorporating the database in Figure 2, Figure 4 is a conceptual diagram of online maintenance operations, 5
The figure is a flowchart showing the procedure of online maintenance. ENS...Engineering Station FC...
- Control station BS...Communication line 21...Editor means, 24...Compiler,
25... Generator 26... Online maintenance means 27... Message output means 28... Address list means 29... Generation means 30... Communication means Fig. 2 Fig. 3 Section 4 (a ) (b) (c) Figure 5

Claims (1)

[Claims] Editor means for editing the source files of each program unit; a compiler for converting the source files edited by the editor means into object modules; and assembling the object modules converted by the compiler into a database file. An engineering station comprising: a generator; and an online maintenance means for partially changing or correcting a database read from the database file using the editor means; Compare the size of the program unit after the modification with the size of the object module generated by the previous compilation, and if the size is larger than that, provide a message output means to notify that fact, and the generator. , address list means for storing the names and storage addresses of each program unit incorporated in the database file, and program units that have been changed or modified by the online maintenance means. An engineering station characterized in that it is provided with a generation means arranged at the same address to perform generation.