JP3496436B2 - Programmable controller - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a programmable controller that controls an external device based on a user program created by a user.

[0002]

2. Description of the Related Art Conventionally, as this type of programmable controller, there is a programmable controller having a CPU unit and a connection unit connected to the CPU unit via an information transmission means.

The CPU unit includes a system memory that stores an operation system program that describes a control procedure for controlling the entire system, and a user program memory that stores a user program that describes a calculation procedure for a user to control an external device. A communication unit connected to a communication device for transmitting and receiving data, and a central processing unit having a register for holding data, controlling the system with an operation system program and executing a calculation based on a user program. It is provided.

The connection unit has a connection unit system memory in which a control program describing a control procedure for controlling the entire connection unit is stored, a data memory in which data is stored, and an arithmetic processing unit for executing an operation based on the control program. And are provided.

More specifically, as shown in FIG. 3, the user program memory A includes, in addition to the user program A1,
A system register A2, which is user-created unique information necessary for the operation of the CPU unit, and a header A3, which is system management information, are stored. Therefore, the unique information that can be managed is only the system register A2 stored in the user program memory A, and the unique information other than the system register A2 is different area other than the user program memory A of the CPU unit, the connection unit, or totally external. Stored in the device.

[0006]

In the conventional programmable controller described above, the central processing unit controls the entire system by the operation system program, and executes the operation based on the user program A1 stored in the user program memory A. Then, the external device can be controlled.

However, since the unique information other than the system register A2 is stored in the memory other than the user program memory A, the expandability is poor, and the unique information must be set individually by individual means, which is efficient. There was a problem with sex.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a programmable controller capable of efficiently setting each unique information of a CPU unit, a connection unit, or a user program. is there.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 is a programmable device comprising a CPU unit and a connection unit connected to the CPU unit via information transmission means. In the controller
The CPU unit includes a system memory that stores an operation system program that describes a control procedure for controlling the entire system, a user program memory that stores a user program that describes a calculation procedure for a user to control an external device, A communication unit connected to a communication device for transmitting and receiving data, and a central processing unit having a register unit for holding data, controlling the system with an operation system program and executing a calculation based on a user program. The connection unit is provided with a connection unit system memory that stores a control program that describes a control procedure for controlling the entire connection unit, a data memory that stores data, and an arithmetic processing unit that executes an operation based on the control program. Is provided
The user program memory is a memory of the CPU unit .
A unique information storage area is provided for storing at least one unique information of unique information , unique information of the connection unit, or unique information of the user program.
The information storage area has multiple predetermined areas corresponding to each unique information.
A pointer indicating the address of each unique information and information
It is characterized by being separately stored in the report content .

According to a second aspect, in the first aspect, the central processing unit is configured to store the unique information from the communication device in the unique information storage area via the communication means. There is.

According to a third aspect of the present invention, in the first aspect, the central processing unit stores the unique information in the unique information storage area based on the user program in which a storage instruction is described. It is configured.

According to a fourth aspect, in the first aspect, a new function is extended and added to the unique information.
That time was made from the CPU unit system information necessary for the operation of the new function, the CPU unit, the C
The PU unit system information is read and operated.

According to a fifth aspect of the present invention, in the first aspect, the unique information comprises initial value data used in the user program, and the central processing unit.
Is read the initial value data, are a configuration to be transferred to the register unit at the start of the user program.

According to a sixth aspect of the present invention, in the first aspect, the unique information storage area is configured to store the unique information including user program additional information added to the user program. .

According to a seventh aspect of the present invention, in the first aspect, the unique information storage area stores the unique information consisting of connection unit initial setting information necessary for the connection unit to operate. It is configured.

According to an eighth aspect of the present invention, in the seventh aspect, the connection unit operates based on the connection unit initial setting information called from the unique information storage area via the information transmission means. It is configured to be formed.

According to a ninth aspect, in the seventh aspect, the connection unit stores the connection unit initial setting information transferred from the unique information storage area via the information transmission means. An initial setting information storage area is provided in the data memory, and is configured to operate based on the stored connection unit initial setting information.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS.

A CPU unit 1 is a system memory 1
1, a user program memory 12, a communication interface 13, a central processing unit 14, and a first information transfer interface 15 are provided.

The system memory 11 is a non-volatile ROM
Thus, the operation system program 11a describing the control procedure for controlling the entire system is stored.

The user program memory 12 is composed of a RAM or a ROM, and a user program 12a in which an operation procedure for the user to control the external device 31 is described, and a CP.
The system register 12b, which is unique information necessary for the operation of the U unit 1, and the header 1, which is system management information.
2c and are stored.

Further, a unique information storage area 12d is provided, which is divided into a plurality of n storage areas and has a predetermined area 12e which is divided into a pointer representing an address, a capacity, a label, and information content. Each information content is stored corresponding to each address.

The communication interface 13 forms a communication means, is connected to the communication device 13a, and transmits / receives data serially according to the communication standard of RS232C or RS422C. Here, the communication device 13a is a personal computer which is formed of a programming device and in which programming software for programming the user program 12a is installed.

The central processing unit 14 calls the operation system program 11a stored in the system memory 11 by the microcomputer, controls the entire system based on the operation system program 11a, and stores it in the user program memory 12. The specified user program 12a is called to execute the necessary calculation. First information transfer interface 1
Reference numeral 5 forms an information transmission means for transmitting and receiving data in parallel.

2 is a connection unit, which is a positioning unit,
It is formed of a link unit, a high-speed counter, or the like, each of which is provided with a connection unit system memory 21, a data memory 22, an arithmetic processing unit 23, and a second information transmission interface 24.

The connection unit system memory 21 stores a control program 21a describing a control procedure for controlling the entire system of the connection unit 2. Data memory 22
In addition to storing data such as parameters, there is provided a work area for storing the result of work by the arithmetic processing section 23, and further an initial setting information storage area 22a, which will be described later in detail.

The arithmetic processing unit 23 executes an arithmetic operation based on the control program 21a stored in the connection unit system memory 21. Second information transfer interface 24
Is an information transmission means, is connected to the first information transmission interface 15 of the CPU unit 1, and transmits / receives data in parallel.

The operation of this one will be described. New functions are expanded and added to the CPU unit 1. Further, the operation system program 11a is provided with a storage instruction for storing the unique information of the CPU unit 1, the connection unit 2, and the user program 12a in the unique information storage area 12d, and a calling instruction for calling. Based on the operation system program 11a, the central processing unit 14 sends each piece of unique information from the communication device 13a via the communication interface 13 to the unique information storage area 1
It stores in each position of the predetermined area 12e of 2d.

Here, the unique information of the CPU unit 1 is the CPU unit system information and the initial value data. CPU unit system information is CPU unit 1
Is the setting information necessary to operate when a new function is expanded and added, and the expanded system register 12b
Equivalent to. The initial value data is the conventional user program 1
2a, which is set by the user and used by the user program 12a.

The unique information of the connection unit 2 is connection unit initial setting information, which is necessary for the connection unit 2 to operate. Further, the unique information of the user program 12a is the user program additional information, which is not related to the control of the external device 31 and corresponds to the comment or resource information added to the user program 12a.

The central processing unit 14 stores the CP stored in the unique information storage area 12d of the user program memory 12.
While calling the U unit system information, the user program 12a similarly stored in the user program memory 12 is activated, and the initial value data of the user program 12a stored in the unique information storage area 12d is called and transferred to the register unit. .

The connection unit 2 uses the operation system program 11a in which a transfer command for transferring the connection unit initial setting information is described, so that the first information transfer interface 15 and the second information transfer interface 24 of the CPU unit 1, that is, the information. The connection unit initial setting information is transferred from the unique information storage area 12d via the transmission means and stored in the initial setting information storage area 22a.
Then, the arithmetic processing unit 23 performs an arithmetic operation using the work area of the data memory 22 based on the stored connection unit initial setting information, and transmits the arithmetic result to the central arithmetic processing unit 14 via the information transmitting means. .

Here, the CPU unit 1 is an external device 31.
An input unit 3 for inputting an external signal from the output unit 4 and an output unit 4 for outputting a calculation result to the external device 31 are connected. The central processing unit 14 of the CPU unit 1 includes an external signal from the external device 31, a calculation result from the connection unit 2, CPU unit system information and initial value data called from the unique information storage area 12d, and a calculation procedure by the user. Is calculated based on the user program 12a described above, and the calculation result is output to the output means to control the external device 31.

In the programmable controller of the first embodiment, as described above, the unique information storage area 12d for storing the unique information of the CPU unit 1, the connection unit 2, and the user program 12a is stored in the user program memory. The central processing unit 14 provides the unique information to the predetermined area 12 of the unique information storage area 12d.
Since it is stored in e, the unique information necessary for controlling the external device 31 can be efficiently set, and the unique information storage area 12d is centrally stored and collectively managed instead of being distributed as in the past. You can

Further, since the unique information is stored by the central processing unit 14 from the communication device 13a via the communication means, the unique information is uniquely used by using the programming device or the like for creating the user program 12a as the communication device 13a. It can be easily stored in the information storage area 12d.

Further, the unique information including the CPU unit system information necessary for the operation of the CPU unit 1 is stored in the unique information storage area 12d, and at the same time, the CPU
Since the unit 1 is formed to operate based on the stored CPU unit system information, when a new function is extendedly added to the CPU unit 1, the CPU unit system information necessary for the new function to operate is stored. Thus, the newly added new function can be easily realized without securing a new storage area.

Further, the unique information consisting of initial value data set by the user of the user program 12a is stored in the unique information storage area 12d, and the central processing unit 14 is operated.
Since the initial value data of the user program 12a in which is stored is transferred to the register section when the user program 12a is activated, the user program can be efficiently created in a short time without creating a program for storing the initial value data. be able to.

Further, since the unique information including the user program additional information added to the user program 12a is stored in the unique information storage area 12d, the unique information such as a comment or resource is stored as the user program additional information, and a new storage is performed. The user program 12a can be easily maintained, inspected, or changed without providing a memory.

Further, since the peculiar information consisting of the connection unit initial setting information necessary for the operation of the connection unit 2 is stored in the peculiar information storage area 12d, the connection unit initializing information such as the link unit and the positioning unit is connected. Since the unique information to be set by the two users can be collectively stored, when the connection unit 2 is replaced, unlike the conventional method in which the unique information is stored again in the connection unit 2, maintenance, inspection, or replacement of the connection unit 2 is performed. Can be done easily.

Further, the connection unit 2 is provided with an initial setting information storage area 22a for storing the connection unit initial setting information transferred from the unique information storage area 12d via the information transmission means. Since the operation is performed based on the connection unit initial setting information stored in the initial setting information storage area 22a, it is not necessary to limit the memory access of the CPU unit 1, and the load of the CPU unit 1 other than during transfer can be reduced. You can

In the first embodiment, the unique information storage area stores the unique information of the CPU unit, the connection unit, and the user program in a predetermined area by the central processing unit. , And at least one of each unique information of the user program may be stored, and there is no limitation.

A second embodiment of the present invention will be described below.
In the second embodiment, functions different from those in the first embodiment will be described. A storage command for storing each unique information in the unique information storage area 12d of the user program memory 12 is described in the user program 12a, not in the operation system program 11a. The central processing unit 14 uses the user program 1 in which the storage instruction is described.
2a, the unique information is stored in the unique information storage area 12d.
To store.

In the programmable controller of the second embodiment, as described above, the unique information is stored by the central processing unit 14 based on the user program 12a in which the storage instruction is described. The unique information can be easily stored in the unique information storage area 12d by executing the storage instruction of 12a.

The third embodiment of the present invention will be described below.
In the third embodiment, functions different from those in the first embodiment will be described. The connection unit 2 has an initial setting information storage area 22a for storing connection unit initial setting information.
Are not provided in the data memory 22. Then, the arithmetic processing unit 23 causes the unique information storage area 1 via the information transmission means.
The connection unit initialization information is called from 2d, and the operation is performed based on the called connection unit initialization information.

In the programmable controller according to the third embodiment, as described above, the connection unit 2 operates based on the connection unit initial setting information called from the unique information storage area 12d via the information transmission means. Therefore, the connection unit 2 can be formed at low cost without providing a new storage memory for storing the unique information for each connection unit 2.

[0046]

According to the first aspect of the present invention, the user program memory is provided with the unique information storage area for storing the unique information of at least one of the CPU unit, the connection unit and the user program, and the central processing unit is provided with the unique information storage area. Since the unique information is stored in a specific area of the unique information storage area, the unique information required to control external devices can be efficiently set, and the unique information is centrally stored in the unique information storage area instead of being distributed. It can be managed collectively.

According to the second aspect, in addition to the effect of the first aspect, the unique information is stored from the communication device by the central processing unit via the communication means, so that the programming device for creating the user program. Etc. as a communication device, the unique information can be easily stored in the unique information storage area.

According to the third aspect, in addition to the effect of the first aspect, the unique information is stored by the central processing unit on the basis of the user program in which the storage instruction is described. The storage instruction can be executed to easily store the unique information in the unique information storage area.

According to a fourth aspect of the present invention, in addition to the effect of the first aspect, unique information including CPU unit system information necessary for the CPU unit to operate is stored in a unique information storage area, and Since the CPU unit is formed to operate based on the stored CPU unit system information, when a new function is extendedly added to the CPU unit, the CPU unit system information necessary for the new function to operate is stored. The newly added new function can be easily realized without securing a new storage area.

According to a fifth aspect of the present invention, in addition to the effect of the first aspect, unique information consisting of initial value data set by the user of the user program is stored in the unique information storage area and the central processing is performed. The initial value data of the stored user program is transferred to the register section when the user program is started, so the user program can be created efficiently and in a short time without creating a program for storing the initial value data. You can

According to the sixth aspect, in addition to the effect of the first aspect, the unique information consisting of the user program additional information added to the user program is stored in the unique information storage area. By storing unique information such as comments or resources, the user program can be easily maintained, inspected, or changed without providing a new storage memory.

According to the seventh aspect, in addition to the effect of the first aspect, the unique information including the connection unit initial setting information necessary for the operation of the connection unit is stored in the unique information storage area. Unique information that should be set by the user of the connection unit such as the link unit and positioning unit can be stored in batch as the connection unit initial setting information, so when replacing the connection unit, unique information is stored again in the connection unit. Thus, the connection unit can be easily maintained, inspected, or replaced.

According to the eighth aspect, in addition to the effect of the seventh aspect, the connection unit operates based on the connection unit initial setting information called from the unique information storage area via the information transmission means. Therefore, without providing a new storage memory for storing unique information for each connection unit,
The connection unit can be formed at low cost.

According to a ninth aspect of the present invention, in addition to the effect of the seventh aspect, an initial setting information storage area in which the connection unit initial setting information transferred from the unique information storage area via the information transmission means is stored. Is provided in the data memory of the connection unit, and the connection unit operates based on the connection unit initial setting information stored in the initial setting information storage area. Therefore, there is no need to limit the memory access of the CPU unit. The load on the CPU unit can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a storage area diagram of a user program memory of the above.

FIG. 3 is a storage area diagram of a user program memory showing a conventional example.

[Explanation of symbols]

1 CPU unit 11 System memory 11a Operation system program 12 User program memory 12a User program 12d Unique information storage area 12e Predetermined area 13 Communication interface (communication means) 13a Communication equipment 14 Central processing unit 15 First information transmission interface (information transmission means) 2 connection units 21 Connection unit system memory 21a Control program 22 Data memory 22a Initial setting information storage area 23 Arithmetic processing unit

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G05B 19/02-19/05

Claims (9)

(57) [Claims] 1. A CPU unit and, Bei and a connection unit connected via the CPU unit and the communication unit
In the programmable controller, the CPU unit has a system memory that stores an operation system program that describes a control procedure for controlling the entire system, and a user program that stores a user program that describes a calculation procedure for a user to control an external device. A central processing unit that has a memory, a communication unit that is connected to a communication device to send and receive data, and a register unit that holds data, controls the system with an operation system program, and executes an operation based on a user program. And a connection unit system memory that stores a control program that describes a control procedure for controlling the entire connection unit, a data memory that stores data, and an operation that executes an operation based on the control program. And a calculation processing unit is provided, the user program memory, specific information of the CPU unit, the unique information of the connection unit, or solid of the user program
Unique for storing at least one specific information of the specific information
An information storage area is provided, and the unique information storage area is
Equipped with multiple predetermined areas corresponding to existing information, each unique information
Separately stored in the pointer indicating the address and information content
Programmable controller characterized by being . 2. The programmable controller according to claim 1, wherein the central processing unit stores the unique information from the communication device via the communication means in the unique information storage area. 3. The programmable controller according to claim 1, wherein the central processing unit stores the unique information in the unique information storage area based on the user program in which a storage instruction is described. 4. The unique information has a new function extended and added.
That time was made from the CPU unit system information necessary for the operation of the new function, the CPU unit, the C
The programmable controller according to claim 1, wherein the programmable controller is configured to read and operate the PU unit system information . 5. The unique information includes initial value data used in the user program, and the central processing unit.
Parts are by reading the initial value data, the programmable controller of claim 1, wherein the transfer to the register unit at the start of the user program. 6. The unique information storage area stores the unique information including user program additional information added to the user program.
Programmable controller described. 7. The programmable controller according to claim 1, wherein the unique information storage area stores the unique information including connection unit initial setting information necessary for the connection unit to operate. 8. The connection unit is formed so as to operate based on the connection unit initialization information called from the unique information storage area via the information transmission means. Programmable controller. 9. The connection unit is provided with an initial setting information storage area, in which the connection unit initial setting information transferred from the unique information storage area via the information transmission means is stored, in the data memory, and stored therein. 8. The programmable controller according to claim 7, wherein the programmable controller is formed to operate based on the connection unit initialization information that has been set.