JPH07147599A - Data transmitter - Google Patents

Abstract

PURPOSE:To easily set input output device (I/O) configuration data of the data transmitter different from each customer without provision of a special setting means. CONSTITUTION:A register 4A storing attribute information is provided to each I/O 4, a CPU 2 collects the attribute information at system start and stores the information to a RAM 2A to set system configuration data automatically. Thus, the cost is reduced without special provision of a specific setting means and the reliability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a plurality of input / output devices (I / O) and a data processing device for controlling each of them, and performs data transmission with other devices via a transmission path. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission device, and more particularly to a data transmission device that facilitates setting of its attribute data for its input / output device.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional example of this type. In the figure, reference numeral 1 is a modulator / demodulator (modem), 2 is a data processing device (CPU), 3 is a memory, 4 (41 to 4N) is an input / output device (I / O), and 5 is an operating device (operating tool). ). That is, here, I / O configuration data indicating the configuration of the I / O system is stored in the memory 3 in advance, and the CPU 2 processes the data captured by the I / O 4 based on this data according to a predetermined procedure, and the modem The data input from the communication line is received by the CPU 2 via the modem 1, processed by a predetermined procedure, and output to the I / O 4.

[0003]

By the way, in the conventional device, since the I / O configuration is different for each customer, the I / O configuration at the time of shipment is reduced.
Not only is it necessary to write the O configuration data in the memory, but it is also necessary to change the contents of the memory when an I / O is added or changed at the start of operation. That is, not only the operating device (operation tool) 5 as shown in FIG. 3 is required for writing and changing to the memory, but also an operator who handles the operation tool 5 and education for the operation device 5 are required, resulting in high cost. There is a problem such as becoming. There is also a problem that an artificial error occurs when writing data. Therefore, it is an object of the present invention to reduce the cost by making it possible to omit the memory writing tool and to improve the reliability.

[0004]

In order to solve such a problem, according to the present invention, a plurality of input / output devices and a data processing device for controlling each of them are provided so as to be connected to another device via a transmission line. In the data transmission device for performing data transmission in, each of the input / output devices is provided with storage means for storing attribute information indicating what kind of attribute each has.
It is characterized in that the data processing device collects the attribute information from each storage means when the system is started up and holds the attribute information in the processing device, and performs the subsequent processing based on the held information. According to the present invention, by unifying the data formats of the attribute information, it is possible to make the input / output programs of the data processing device common.

[0005]

Each of the plurality of I / Os is provided with a register for storing attribute information indicating what kind of attribute it has,
When the system is started up, the CPU collects each of the attribute information and stores it inside, so that the held data can be used to execute subsequent input / output processing. Further, by unifying the format of the attribute information, the input / output program is unified, the ROM capacity is reduced, and the processing speed is increased.

[0006]

1 is a block diagram showing an embodiment of the present invention.
A is a RAM, and 4A is a register for storing I / O attribute information. As is clear from the figure, each I / O
4 is provided with register 4A, while CPU2 has RAM2
The feature is that A is provided and the memory 3 and the operation tool 5 are omitted. That is, the attribute information indicating what kind of attribute each has is stored in the register 4A of each I / O4, and this attribute information is read from the register 4A of each I / O4 by the CPU 2 at the time of system startup. Is stored in the internal RAM 2A as system configuration data.

The attribute information may be direction information of input device or output device, number of input / output points (number of sensors or switches), data type information indicating analog or digital, and other appropriate information is added. be able to. The CPU 2 thus collects from the register 4A,
By referring to the configuration data stored in the M2A, it is possible to know what kind of attribute each I / O has, so that it becomes possible to execute a predetermined input / output process. is there.

FIG. 2 is a block diagram showing another embodiment of the present invention. As is clear from the figure, a ROM 2B is provided in the CPU 2, and each I / O is different from that shown in FIG.
Each register 4 has a register 4B.
This is because, for example, the data stored in the register 4A usually has a different format for each I / O, but if it is left as it is, a different input or output program is required for each I / O.

Therefore, in this embodiment, for example, a register 4B having the same size is provided and its data format is set to each I.
It is possible to deal with one type of input or output program by unifying between the / O. In order to unify the formats, it is assumed here that, for example, the register 4B is simply matched with the capacity of the register 4A having the maximum capacity and the content of the register 4A is transferred to the register 4B, but any other suitable method may be used. Of course, you can The ROM 2B is provided to store the input or output program thus unified.

[0010]

According to the present invention, since an operation tool for writing and changing data in the memory and an operator for handling the same are not required, there is an advantage that the cost can be greatly reduced. There is also an advantage that human error is eliminated and reliability is improved. Further, if the input / output programs are made common, not only the ROM capacity can be reduced, but also the processing speed is improved. Furthermore, since the program does not need to be changed when developing a new I / O, the system expandability is improved. The advantages such as are obtained.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing another embodiment of the present invention.

FIG. 3 is a block diagram showing a conventional example.

[Explanation of symbols]

1 ... Modulator / demodulator (modem), 2 ... Data processing device (CP
U), 2A ... RAM, 3 ... memory, 4 (41-4N) ...
Input / output device (I / O), 4A, 4B ... Register, 5 ... Operating device (operating tool).

Claims (2)

[Claims] 1. A data transmission device, comprising a plurality of input / output devices and a data processing device for controlling each of them, for transmitting data to / from another device via a transmission path. Storage means for storing attribute information indicating what kind of attribute each has is provided, and when the system is started, the data processing device collects the attribute information from each storage device and holds it in the processing device. A data transmission device characterized by performing subsequent processing based on the held information. 2. The data transmission device according to claim 1, wherein the input / output programs of the data processing device can be made common by unifying the data formats of the attribute information.