JPH04235604A - Programmable controller - Google Patents

Abstract

PURPOSE:To offer only the functions that are desired by users by providing previously all execution enabling functions to a programmable controller. CONSTITUTION:A storage means 100 stores plural programs which prescribed the executing contents of each type of processing, and an arithmetic processing means 1100 reads a designated program out of the means 100 and computes the program. Then a register means 1200 is added to register the identification information on a program that enables the execution of an arithmetic operation together with a control means 1300 which grants the execution of the arithmetic operation of the means 1100 for the program stored in the means 1000 that is equal to the program showing the identification information on the means 1200. Then the means 1200 designates the specific one of various type of programs stored in the means 1000, and only this specific program can be carried out.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a programmable controller for automatically controlling electronic equipment.

0002

[Prior Art] Arithmetic scanning in a conventional programmable controller consists of arithmetic processing → output processing → input processing →
A cyclic scan method is generally used, which performs system control in the order of arithmetic processing. Furthermore, in consideration of cases where processing cannot be completed in this order, an interrupt scan method is provided in which an interrupt means is used to prioritize a part of arithmetic processing → output processing → input processing, etc. Further, a processing method using constant scanning is also known, which always guarantees a scan interval of a constant time without being affected by the instruction processing time of a user program. Other well-known functions of the sequence calculation function of the programmable controller include equipment failure diagnosis and sequence program debug processing. These functions are executed for each scan according to the procedure shown in FIG.

0003

[Problem to be Solved by the Invention] However, since the programmable controller is equipped with functions that are not particularly necessary for specific users, the above-mentioned specific users say that it is difficult to learn how to operate the programmable controller. is also asked. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a programmable controller that is equipped with all executable functions and can provide only the functions desired by the user.

0004

[Means for Solving the Problems] In order to achieve such an object, the present invention provides a storage means that stores a plurality of programs that define execution contents of various system processes, and a storage means that stores a pre-specified program. an arithmetic processing means that reads out from the means and executes an arithmetic operation; a registration means that registers identification information indicating a program that is permitted to perform an arithmetic operation; and a program stored in the storage means that is the same as the program indicated by the identification information of the registration means. and a control means for permitting the arithmetic processing means to execute arithmetic operations.

000
5]

[Operation] In the present invention, a specific program among various programs stored in the storage means is designated by the registration means, and only this particular program can be executed. For this purpose, the manufacturer only has to store programs for all the executable functions of the programmable controller in the storage means, and there is no need to selectively store programs for each user request, simplifying the manufacturing process. can do. Further, since programs unnecessary for the user are not executed, there is an advantage that the execution time of system processing can be shortened. Moreover, the operation process is also simplified.

[0006]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the basic configuration of an embodiment of the present invention.

The programmable controller of this embodiment includes a storage means 1000 that stores a plurality of programs that define the execution contents of various system processes, and an arithmetic processing means 1100 that reads a prespecified program from the storage means and executes the calculation. a registration means 1200 for registering identification information indicating a program whose execution of calculations is permitted; and a registration means 1200 for registering identification information indicating a program whose execution of calculations is permitted, and permission for the calculation processing means to execute calculations for a program stored in the storage means that is the same as the program indicated by the identification information of the registration means. A control means 1300 is provided.

FIG. 2 shows a specific circuit configuration of an embodiment of the present invention.

In FIG. 2, a central processing unit (CPU
) 1 controls the entire system according to the system program on the system memory 4.

A bit operation processor (BP) 2 performs sequence operations according to a user program stored in a user memory 3.

Input/output (I/O) bus interface (I
F) is connected to optional devices such as an I/O device 9 and a high-speed counter 10 via a bus 8.

[0013] The loader IF7 communicates with the loader (programming device).

The setting switch 6 sets the operating mode. Loader IF7 and setting switch 6 are connected to CPU1. Note that the system memory 4 has a registration table 4.
A is provided.

As shown in FIG. 4, the registration table 4A has the following information:
Flag information of "1"/"O" is stored in association with the name of a function executable in the programmable controller. Bit "1" in this flag information indicates that execution of a function corresponding to the flag information, specifically, a system program that defines this function, is permitted.

When flag information and identification information indicating its function name are input through the operation of the loader or the setting switch 6, the CPU 1 registers the flag information in the registration table 4A.

The CPU 1 and the BP 2 execute the control procedure shown in FIG. 3 every time the scanning process is completed, and sequentially execute the processing programs that are permitted to be executed in the registration table 4A. Specifically, for example, the processor of CPU1 or BP4 reads the flag information of the registration table 4A,
It is determined whether this flag information is bit "1" or not. Next, when a determination result that the flag information is "1" is obtained, a processing program corresponding to the flag information is executed. Discrimination processing of the bit contents of this flag information (Figure 3
In this case, the CPU 1 or B1 when executing the processes S2, S4, S6, S9, and S10 operates as the control means of the present invention. Further, the registration table 4A and the setting switch 6 operate as a registration means of the present invention, and the system memory 4 operates as a storage means of the present invention. Furthermore, the CPU 1 when executing the system program for each function
Alternatively, B1 operates as the arithmetic processing means of the present invention.

As explained above, in this embodiment, not only can the system processing required by the user be selectively executed, but also it is possible to execute all the system processing according to the procedure shown in FIG. 5 as in the conventional case. , system processing time is also reduced.

In addition to this embodiment, the following examples are given.

1) In this embodiment, programs that are permitted to be executed among programs stored in the system memory are represented by flag information in the registration table 4A. When a program is selectively executed on multiple processors, the flag information is multi-valued. For example, "0" disables execution, "1" enables execution of the first processor, and "2" enables execution of the second processor. If you give meaning to flag information like this,
The registration table 4A allows execution programs to be assigned to each processor.

[0021]

As described above, according to the present invention, the user can select necessary system functions. Therefore, the initial processing required for each system function at the time of system startup and the start of a scan cycle for all system functions installed in the programmable controller is reduced, resulting in the effect that system processing time can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing a circuit configuration of an embodiment of the present invention.

FIG. 3 is a flowchart showing a control procedure executed by BP2 or CPU1 in FIG. 1;

FIG. 4 is an explanatory diagram showing the contents of a registration table according to the embodiment of the present invention.

FIG. 5 is a flowchart showing a conventional system processing procedure.

[Explanation of symbols]

1 CPO 2 BP 3 User memory 4 System memory 4A Registration table 5 I/O bus IF 6 Setting switch 7 Loader IF 8 Bus 9 I/O 10 High speed counter

Claims (1)

[Claims] 1. A storage means that stores a plurality of programs defining execution contents of various system processes, an arithmetic processing means that reads a pre-designated program from the storage means and executes an operation, and a program that permits the execution of an operation. and a control means for permitting the arithmetic processing means to perform arithmetic operations on a program stored in the storage means that is the same as the program indicated by the identification information of the registration means. Features a programmable controller.