JPH11312136A - I/o controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with a programmable controller by permitting an input and output part to output an output signal based on the arithmetic result of serial data to control an external equipment and also permitting it to input an input signal in response to the output signal from the external equipment. SOLUTION: A control command is generated, based on a previously decided prescribed protocol and serial data, including the control command are outputted to the RS232C port 11 of a personal computer 1. The outputted serial data are received in a transmitting/receiving part 2 with a transmission path 21, the received serial data, that is the control command is analyzed by an arithmetic part 3 and the arithmetic result is outputted to the input and output part 4. The input and output part 4 outputs the output signal 41, based on the arithmetic result to the external equipment 5, controls the external equipment 5 and also inputs the input signal 51, including data in response to the output signal 41 from the external equipment 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an I / O (INPUT / OUTPUT) controller which is connected to a personal computer and an external device and controls input / output of the external device based on data from the personal computer. .

[0002]

2. Description of the Related Art Conventionally, as this type of I / O controller, there is an I / O board mounted on a personal computer 1 or a programmable controller having a communication function.

[0003]

The above-mentioned conventional I / O
The controller can control the input and output of the external device based on the data from the personal computer.

However, controlling an external device using an I / O board requires a dedicated driver and a high level of control knowledge, and a programmable controller generally uses, for example, a data processing operation in addition to I / O control. Since various functions such as a section are added, it is expensive, and the use of the programmable controller causes a cost increase.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an I / O controller that can easily and inexpensively control the input / output of an external device.

[0006]

According to a first aspect of the present invention, there is provided a personal computer which is connected to an RS232C port provided on a personal computer via a transmission path, and is connected to a serial port based on a predetermined protocol. A transmitting / receiving unit for transmitting / receiving data, a computing unit provided with an MPU for analyzing received serial data and outputting a calculation result, and connected to an external device to output an output signal based on the calculation result and control the external device And an input / output unit for receiving an input signal in response to the output signal.

According to a second aspect of the present invention, there is provided a transmission / reception unit connected to a Centronics port provided in a personal computer via a transmission path for transmitting and receiving parallel data based on a predetermined protocol, and an MPU provided with the received parallel data. A calculation unit that analyzes the data and outputs a calculation result, and is connected to the external device, outputs an output signal based on the calculation result, controls the external device, and receives an input signal in response to the output signal. The input / output unit is provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. This is connected to the personal computer 1 and transmits and receives serial data to and from each other based on a predetermined protocol which is a predetermined format on the system.

The personal computer 1 is an RS232
A C port 11 and a Centronics port 12 are provided, and are easily controlled in a widely used BAISIC language. The RS232C port 11 transmits and receives serial data, and the Centronics port 12 transmits and receives parallel data. Then, the serial data including the control command is transmitted to the RS232C based on a predetermined protocol.
While being transmitted via the port 11, serial data including response data is received from the transmitting / receiving unit 2 described later.

Reference numeral 2 denotes a transmission / reception unit, which is formed of a circuit and is provided with an RS232C port 1 provided in the personal computer 1.
1 is connected via a transmission path 21 composed of a serial cable to transmit and receive serial data.

An operation unit 3 is an MPU (Microprotocol).
A transmitting unit is provided, and the transmitting / receiving unit 2 analyzes and calculates serial data including the control command received and outputs a calculation result.

Reference numeral 4 denotes an input / output unit, which is formed of a circuit and is connected to the external device 5 and outputs an output signal 41 based on the operation result calculated by the operation unit 3 to the external device 5. External device 5
Is controlled based on an output signal 41 from the input / output unit 4, outputs an input signal 51 including response data responding to the output signal 41, and inputs the input signal 51 to the input / output unit 4.

The operation of this device will be described. First, the user creates a control program which is described in basic and controls the external device 5, creates a control command based on a predetermined protocol, and the personal computer 1 transmits serial data including the control command. RS2
Output to 32C port 11. The transmission / reception unit 2 is RS232
The serial data output from the C port 11 is received via the transmission path 21, and the arithmetic unit 3 analyzes and calculates the received serial data, that is, the control command, and outputs the arithmetic result to the input / output unit 4.

The input / output unit 4 outputs an output signal 41 based on the calculation result to the external device 5, and the external device 5
And an input signal 51 including response data to the output signal 41 is input from the external device 5. Then, the arithmetic unit 3 analyzes the response data, transmits the analysis result as serial data to the personal computer 1 via the transmission / reception unit 2, and the personal computer 1 displays the analysis result as needed based on the control program. .

In the I / O controller according to the first embodiment, as described above, the MPU of the operation unit 3 analyzes the serial data transmitted from the RS232C port 11 of the personal computer 1 and outputs the operation result. And
Since the input / output unit 4 outputs the output signal 41 based on the calculation result to control the external device 5 and receives the input signal 51 responding to the output signal 41 from the external device 5, a dedicated driver is required. Based on the serial data from the personal computer 1, the required I / O board can be simply and without being loaded into the personal computer 1 and without using an expensive programmable controller having various functions. In addition, the input / output of the external device 5 can be controlled at low cost.

A second embodiment of the present invention will be described below with reference to FIG. In the second embodiment, functions different from those in the first embodiment will be described, and members having substantially the same functions as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted. In the second embodiment, the personal computer 1 is connected to and transmits and receives parallel data to and from each other based on a predetermined protocol.

In the personal computer 1, parallel data including a control command is transmitted via a Centronics port 12 which is a printer port, and parallel data including response data is received from the transmission / reception unit 2.

The transmitting / receiving unit 2 includes a personal computer 1
Is connected to a Centronics port 12 provided through a transmission path 21 composed of a printer cable to transmit and receive parallel data. The calculation unit 3 analyzes and calculates the parallel data received by the transmission / reception unit 2 and including the control command, and outputs a calculation result.

The operation of the above will be described. The personal computer 1 outputs parallel data including a control command to the Centronics port 12. The transmission / reception unit 2 receives the parallel data output from the Centronics port 12 via the transmission path 21, and the calculation unit 3 analyzes and calculates the received parallel data, that is, the control command, and outputs the calculation result to the input / output unit 4. I do.

Then, the input / output unit 4 outputs an output signal 41 based on the calculation result to the external device 5, and the external device 5
And an input signal 51 including response data to the output signal 41 is input from the external device 5. The operation unit 3 analyzes the response data, transmits the analysis result to the personal computer 1 as parallel data via the transmission / reception unit 2, and the personal computer 1 displays the analysis result as needed based on the control program. .

In the I / O controller of the second embodiment, as described above, the MPU of the arithmetic unit 3 analyzes the parallel data transmitted from the centronics port 12 of the personal computer 1 and outputs the arithmetic result. Then, the input / output unit 4 outputs the output signal 41 based on the calculation result to control the external device 5, and the input signal 51 responsive to the output signal 41 is input from the external device 5. A simple I / O board based on parallel data from the personal computer 1 can be used without loading an I / O board requiring a driver into the personal computer 1 and without using an expensive programmable controller having various functions. It is possible to control the input and output of the external device 5 inexpensively.

[0022]

According to the first aspect of the present invention, the MPU of the arithmetic unit is provided.
Analyzes the serial data transmitted from the RS232C port of the personal computer and outputs the operation result,
The input / output unit outputs an output signal based on the calculation result to control an external device, and an input signal responding to the output signal is input from the external device, so that a dedicated driver is required. Simple and inexpensive input / output of external devices based on serial data from a personal computer without loading the board into a personal computer and without using an expensive programmable controller with various functions added. Can be controlled.

According to a second aspect of the present invention, the MPU of the arithmetic unit analyzes the parallel data transmitted from the Centronics port of the personal computer and outputs an arithmetic result.
The input / output unit outputs an output signal based on the calculation result to control an external device, and an input signal responding to the output signal is input from the external device, so that a dedicated driver is required. Simple and inexpensive input / output of external devices based on parallel data from a personal computer without loading the board into a personal computer and without using an expensive programmable controller with various functions added. Can be controlled.

[Brief description of the drawings]

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

FIG. 2 is a configuration diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Personal computer 11 RS232C port 12 Centronics port 2 Transmission / reception part 21 Transmission path 21 3 Operation part 4 Input / output part 41 Output signal 5 External device 51 Input signal

Claims (2)

[Claims] An R provided in a personal computer
A transmission / reception unit connected to the S232C port via a transmission path to transmit / receive serial data based on a predetermined protocol, a calculation unit provided with an MPU to analyze received serial data and output a calculation result, and to an external device An I / O controller comprising: an input / output unit configured to output an output signal based on a calculation result to control an external device and to input an input signal in response to the output signal. 2. A transmission / reception unit connected to a Centronics port provided in a personal computer via a transmission path for transmitting and receiving parallel data based on a predetermined protocol, and an MPU provided to analyze the received parallel data and calculate an operation result. And an input / output unit connected to the external device to output an output signal based on the calculation result to control the external device and to receive an input signal in response to the output signal I / O characterized by the following:
controller.