JPH0443794A - Data collection device - Google Patents

Abstract

PURPOSE:To simplify the communication processing with a slave unit by providing a parallel I/O means and a serial I/O means making the selection of plural controlled sections, type of control and input output control based on data given from a command analysis means. CONSTITUTION:A command analysis means 22 analyzes request information and takes over the control to a parallel I/O means 23 or a serial I/O means 24. The serial I/O means 24 outputs a controlled section selection signal 26 and a control type signal 27 selecting one control section in the controlled section 30 to the controlled section 30 by analyzing the content of command request information. When number of data control of the slave unit is less, the parallel I/O means 23 is used and when the number of data control is much and plural controlled sections are in use, the serial I/O means 24 is used. Thus, the control section of all slave units is used in common.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device that collects and controls data, and in particular, a device that collects and controls data and has a plurality of objects and the number of items is variable in length. Regarding the case.

[Conventional technology]

Conventionally, when collecting and controlling variable length data between a master unit and multiple slave units connected by point-to-multiple, a CPU was installed in each slave unit and requests by the CPU were analyzed. After that, the master unit collected data from each slave unit and controlled it.

[Problem to be solved by the invention]

In the conventional data collection device described above, each slave unit is equipped with a CPU, which increases the mounting area, costs, and processing speed. The disadvantage is that the throughput cannot be increased because the processing is complicated.

[Means for Solving the Problems] The data collection device of the present invention has one unit (a master unit).
When collecting data from multiple units (slave units) or controlling slave units, there is a point where data can be sent and received between the master unit and multiple slave units.
A tow multi-connection communication line is provided, and each slave has a unique identifier.

The master unit has the identifier of the slave unit connected to the above communication line, issues a command to notify the selection of the controlled part in the slave unit and the control type, and collects the response from the slave unit.・Includes control means.

In response to a request via serial communication from the master unit, the Sleif unit receives the request if it is its own unit's identifier, uses a data communication means to send a response, and analyzes the command of the received request. Is the request for data collection?
It is determined whether the control is for the controlled section on the slave unit, and further the control is performed by parallel 1/
O means or serial I/O means, a command analysis means that performs parallel discrete input/output based on the data delivered from the command analysis means, and a parallel I/O means that performs parallel discrete input/output based on data delivered from the command analysis means. It includes a serial 170 means for selecting a plurality of controlled units, controlling the type of control, and controlling input/output based on the data obtained.

〔Example〕

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

FIG. 1 is a block diagram of the data collection device of the present invention, in which a master unit 1 is connected in a point-to-multipoint manner to slave units 2.3.4, each having its own identifier, through a serial communication path 7. ing. Mask Uniy) 1 is
The request information issued by the request issuing unit 5 is transmitted to each slave unit, and the slave unit is requested to send data and collect the data transmitted in response to the request, or the slave unit It has a nowslave unit control section 6 for control.

The request information issued by the master unit 1 has identifier data indicating the slave unit making the data transmission request, and includes this data when controlling the slave unit. Further, within the slave unit, there are a plurality of controlled sections (30 in FIG. 2) that receive request information, and data for the controlled section top type is included.

By issuing the above request information, the master unit 1 can collect variable length data from any slave unit or perform control.

FIG. 2 shows the internal structure of each slave unit 2, 3.4 for realizing the operation of the master unit 1 described above. In the figure, slave unit /O is representative of slave unit 2.3.4 in FIG. The slave unit/O is roughly divided into the control unit 2
0 and a plurality of controlled units 30.

The control unit 20 is commonly implemented in all slave units connected to the master unit 1. A different controlled section 30 is implemented for each slave unit. The controlled section 30 is divided into a parallel interface (halal I/O means) 23 and a serial interface (serial 1/O means) 24 depending on the interface with the control section. Since the parallel interface 23 is limited by the number of signals of the control unit 20, it is not suitable for collecting large amounts of data. Therefore, a small amount of data collected in the master unit is input/output via the parallel interface 23. On the other hand, since the serial interface 24 serializes and transmits the data 28, it is possible to input and output a large amount of data to and from the controlled section 30.

The operation of the control section 20 shown in FIG. 2 will be described below.

Of the request information transmitted from the master unit 1 through the serial communication path 7, the data transmitting/receiving means 21 receives only the request information whose identifier matches that of the own unit, and passes the data to the command analyzing means 22. The command analysis means 22 analyzes the request information and controls it by the parallel I/O means 23 or the serial I/O means 24.
hand over to. The parallel I/O means 23 collects parallel data from or controls the controlled section 30 from its input/output terminal in response to a request. The collected data from the controlled unit 30 is sent to the data transmitting/receiving means 21 and sent to the master unit 1.
sent to. The serial I/O means 24 outputs a controlled unit selection signal 26 for selecting one control unit from the controlled units 30 by analyzing the command content of the request information, and a control type signal 2.
7 is output to the controlled section 30. If the command analysis means 8 determines that data should be collected, the controlled section 30 serially transfers the collected data through the serial I/O means 24. This transferred data is sent to the data transmitting/receiving means 21, and the master unit 1
sent to.

On the other hand, if it is determined that the control data is controlled, the control data is serially transferred via the serial I/O means 23, and the controlled section 30 that receives this expands this received data and performs control within the white wave control section. .

〔Effect of the invention〕

According to the present invention, when one master unit collects or controls data from a plurality of slave units, when the number of data and controls of the slave units is small, parallel I/O means can be used to collect or control data from multiple slave units. If the number of controls is large and there are multiple controlled units, it is possible to make the control unit common to all slave units connected to the master unit by using serial I/O means. can.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing an embodiment of the present invention.
FIG. 1C is a block diagram showing a slave unit in the configuration of the embodiment of the present invention. Agent Patent Attorney Susumu Uchihara

Claims (1)

[Scope of Claims] A data collection device in which one unit (master unit) collects data of a plurality of units (slave units) or controls each slave unit, comprising: the master unit and the plurality of slave units; A point-to-multi connection communication line capable of transmitting and receiving data is provided between the slave units of the slave unit, and each of the slaves has a unique identifier, and the master unit is connected to the slave unit. The slave has an identifier of
Slave unit control means is provided to issue a command to notify the selection of a controlled part in the unit and the control type, and collect the response, and the slave unit is configured to respond to a request via serial communication from the master unit. On the other hand, if it is the own unit's identifier, the data communication means that receives the request and sends the response, and the data communication means on the slave unit that analyzes the command of the received request and determines whether the request is for data collection. Determine whether it is the control of the controlled part,
Furthermore, there is a command analysis means that transfers the control to the parallel I/O means or serial I/O means, and a parallel I/O that performs parallel discrete input/output based on the data transferred from the command analysis means.
O means and serial I/O means for selecting a plurality of controlled parts, controlling type of control, and controlling input/output based on data delivered from the command analysis means. Collection device.