JPH05346880A - Logical interface device between controller and computer - Google Patents

Abstract

PURPOSE:To reduce a load of each CPU so that a design can be separated, and also, to improve the performance of an interface by defining all data of a controller handled in a computer by an independent name in the computer, and executing a data definition in the interface device. CONSTITUTION:The logical interface device between a controller and a computer is provided with a store means 101 for storing an in-computer defined data name, a data classification, an attribute of a data name and a data base of an in-controller address to them, a name defining means 102 for defining their names, a relation defining means 103 for defining a relation of their names and the in-controller address, and a data obtaining means 104 for fetching the data, based on the name defining means 102 and the relation defining means 103.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interface device between a controller and a computer in a system in which the controller and the computer are connected via a network.

[0002]

2. Description of the Related Art An interface between a controller and a computer has a database on one or both of the controller and the computer, and a method of recognizing the data by some kind of data identification code, or the computer makes the relative address of the data in the controller. It is generally taken in by the concept. In that case, the computer is conscious of the array of data in the controller from the viewpoint of total performance to interface. For example, computer CRT
A computer CRT to operate the equipment from the device
When transmitting data from the device to the receiving side (controller), conventionally, as shown in FIG. 5, operation signals from the operating switches A to n in the CRT device 1 are stored in the PC memory 2 of the receiving side (controller). The interface buffers A to n designated corresponding to the operation switches A to n were directly written.

However, in such a conventional device, C
When interfacing between the RT device and computer and the receiving side, the interface buffer size and address are not determined until the entire operation signal is determined. Therefore, if the computer is designed with the data array in the controller in mind, maintenance efficiency will be improved. Not only is it bad, it is necessary to proceed with the design in the same pace as each other. The efficiency of maintenance when adding and changing is poor. If a database is provided in the computer / controller and data is interfaced, the load on the CPU increases and sufficient performance cannot be obtained. There was a problem.

[0004]

Therefore, the problem to be solved by the present invention is to have a database outside a computer and a controller, and to interface all data with a name from the computer to improve performance and independence of the computer and controller. It is to provide an interface device that improves the.

[0005]

In order to solve this problem, the present invention relates to a logical interface device between a controller and a computer, in which the definition data name in the computer, the data type, the attribute of the data name and the address in the controller for them are described. Storage means for storing the database, name definition means for defining their names, relationship definition means for defining the relationship between those names and addresses in the controller,
It is characterized in that a data acquisition means for extracting data based on the name definition means and the relationship definition means is provided.

[0006]

In the present invention, the computer and the controller interface so that the data in the controller can be acquired by an independent name in the computer, and the controller and the computer can proceed with the design without being aware of the data position. It becomes possible to go. Further, in data conversion, it is possible to reduce the CPU load of the controller and the computer.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. FIG. 1 is a block diagram showing the configurations of a controller and a computer logic interface device according to an embodiment of the present invention. In the figure, 101 is a database storing means for storing a database of the definition data name in the computer of the logical interface device, the data type, the attribute of the data name and the name and the address in the controller for the attribute.
Thus, these data are stored in the name defining means 102 and the relationship defining means 103. In addition to these data, the name definition means 102 also stores the definition of data corresponding to the data type. For example, in the case of meaning a field device having a data type, failure information, status information, and attached analog instrument information that the device has are stored. The relationship defining means 103 defines the relationship between the data of the name defining means 102 and the address in the controller, and stores bit data and analog data in correspondence with each other. The data acquisition means 104 associates the name with the in-controller address from the name definition means 102 and the relationship definition means 103, and actually acquires the data from the controller. Further, the data sent from the controller is converted into a name in the computer based on the data of the name defining means 102 and the relation defining means 103, and the computer is interfaced. FIG. 2 is a flowchart of the above processing, which is 200
Is a computer, 300 is a controller, and 400 is a database. FIG. 3 shows an example of a system configuration of hardware that performs the above processing. Reference numeral 31 is a CPU, 32 is a memory, and 33 and 34 are communication control units.

FIG. 4 shows the above specific example, and C
Code numbers 1001 to N are previously determined for the operation switches A to n of the RT device 1, and when the switches are operated, the corresponding predetermined code numbers are fixed to the fixed interface buffer 21 on the receiving side (PC device). Write in. On the receiving side (PC device), the written switch code number is inversely converted by the inverse conversion means 22 and expanded in the memory area of the PC device. The switches thus operated write the corresponding code numbers in the same fixed interface buffer. The operation switches A to n in FIG. 4 correspond to the name defining means in FIG. 1, and the code numbers 1001 to N corresponding to the operation switches correspond to the relationship defining means 103.

[0009]

As described above, according to the present invention, all the controller data handled in the computer are defined by independent names in the computer, and the data is defined in the interface device so that they are mutually independent. The load on the CPU can be reduced and the design can be separated. It also improves the interface performance.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing a process in the present invention.

FIG. 3 is a block diagram showing a system configuration diagram according to the present invention.

FIG. 4 is an explanatory diagram showing a specific example of the present invention.

FIG. 5 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

1 CRT device, 2 PC memory, 21 fixed interface buffer, 22 inverse conversion means, 31 CPU, 32
Memory, 33, 34 communication control unit, 101 database storage unit, 102 name definition unit, 103 relationship definition unit, 104 data acquisition unit, 200 computer, 300
Controller, 400 database

Claims (1)

[Claims] 1. A computer-defined data name, data type,
Storage means for storing a database of data name attributes and controller addresses for them, name defining means for defining those names, relationship defining means for defining the relationship between those names and controller addresses, and name defining means A logical interface device between a controller and a computer, comprising data acquisition means for extracting data based on a relationship definition means.