JPH1165614A - Programmable controller with general-purpose communication port - Google Patents

Abstract

PROBLEM TO BE SOLVED: To commonly use a main substrate and to make this device compact by housing the main substrate and a sub-substrate which are electrically connected through a connector with this main substrate in a case and mounting a general-purpose communication port constituting part on the sub-substrate. SOLUTION: A sub-substrate 2 is freely connected via a cable 3 with a main substrate 1 on which a CPU is mounted. The sub-substrate 2 connects a transmission data line, reception data line, power line, and signal ground line from a serial input and output chip on the main substrate 1, and a part constituting a general communication port in a communication standards such as an RS232C is mounted on the sub-substrate 2. Then, the main substrate 1 and the sub- substrate 2 are connected through the cable 3 by using a connector 10 provided on the main substrate 1 and a connector 20 provided on the sub-substrate 2, and the sub-substrate 2 is fixed to a case 4 by using a pair of hooks and a pair of ribs provided at a case 4. Then, the main substrate 1 is arranged in the case 1, so that the sub-substrate 2 is covered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a programmable controller having a communication port.

[0002]

2. Description of the Related Art Some programmable controllers have a communication port while others do not. However, conventionally, a communication port is mounted on the same main board as a CPU and is not provided with a communication port. Was addressed by using the above-mentioned main board on which the communication port component was not mounted.

[0003]

In this case, the main board can be used in common regardless of the presence or absence of the communication port. However, even if the main board is not provided with the communication port, the main board is provided with the communication port component. Because the mounting space is secured, the product will inevitably become larger.

The present invention has been made in view of the above points, and an object of the present invention is to provide a programmable controller with a communication function capable of reducing the size while enabling common use of a main board. is there.

[0005]

The present invention comprises a main board, a sub-board electrically connected to the main board via a connector, and a case for accommodating the main board and the sub-board. It is characterized in that the communication port component is mounted on the sub-board. The communication port components are mounted on the sub-board, and the sub-board is connected to the main board, and is housed in a case together with the main board to provide a communication port.

At this time, the main board and the sub-board may be connected via a cable. However, if the main board and the sub-board are connected by a connector directly connected to each other, the cable becomes unnecessary. If a plurality of types of sub-substrates having different communication standards, for example, RS232C and RS485 are prepared and selectable, sub-substrates having different communication standards (communication methods) can be obtained easily and inexpensively.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described. In FIG. 1, reference numeral 1 denotes a main board on which a CPU in a programmable controller is mounted. The sub-board 2 is freely connectable. This sub-board 2 is a serial input / output chip SIO on the main board 1 as shown in FIG.
The transmission data line SD, the reception data line RD, the power supply line Vcc, and the signal ground line SG are connected to each other, and components constituting a general-purpose communication port such as RS232C are mounted.

The main board 1 and the sub board 2 are connected to the connector 10 and the sub board 2 provided on the main board 1.
The connection is made by the cable 3 using the connector 20 provided above as described above. Of the main board 1 and the sub-board 2, the small-sized sub-board 2 is
As shown in FIG. 2, a pair of hooks 4
It is fixed to the case 4 by using the pair of receiving ribs 41 and 41. The sub-substrate 2 is placed on the stepped portion of the pair of receiving ribs 41, 41, and both ends of the sub-substrate 2 are positioned.
The sub-board 2 is fixed to the case 4 in a state where it does not move in any direction. The main board 1 is disposed in the case 1 so as to cover the sub-board 2.

The electrical connection between the main board 1 and the sub-board 2 is, as shown in FIG.
Alternatively, the connection may be performed by directly connecting the cables 20 to each other. In this case, the cable 3 can be omitted. In any case, if the communication port is unnecessary, only the main board 1 may be incorporated without incorporating the sub-board 2, and if the communication port is required, the sub-board 2 may be incorporated. For example, if a sub-board 2 'based on another communication standard such as RS485 is also prepared, various types of communication ports can be handled by exchanging the sub-boards 2 and 2'.

[0010]

As described above, in the present invention, it is assumed that the components of the communication port are mounted on the sub-board, and the sub-board is connected to the main board and stored in a case together with the main board, so that the communication port is provided. In order not to mount the components of the communication port on the main board, the main board can be used in common with the one with the communication port and the one without the communication port, and at the same time, can be downsized. It is.

The main board and the sub-board may be connected via a cable or may be connected by a connector directly connected to each other. In the former case, the main board and the sub-board are connected to a dead space in the case. Since the sub-board can be arranged, it is advantageous in terms of miniaturization. In the latter case, the above-mentioned cable becomes unnecessary, and the number of components can be reduced.

Also, a plurality of sub-boards having different communication standards, such as RS232C and RS485, are prepared and selectable, so that not only the presence or absence of a communication port but also a communication standard (communication system) different. In this case, the main board can be used in common, so that a plurality of communication standards can be obtained easily and inexpensively.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an example of an embodiment of the present invention.

FIG. 2 is a view showing a sub-substrate and a case according to the first embodiment;
Is an exploded perspective view, and (b) is a perspective view.

FIG. 3 is a block diagram of the same.

FIG. 4 is an exploded perspective view of another example.

[Explanation of symbols]

 1 main board 2 sub board 3 cable 4 case

[Procedure amendment]

[Submission date] September 16, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

[Title of the Invention] Programmable controller with general-purpose communication port

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a programmable controller having a general-purpose communication port.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

BACKGROUND OF THE INVENTION Programmable controllers, there are to those not equipped with those with universal <br/> communications port, a conventional general-purpose communications port shall be mounted on the same main board with CPU, universal In the case where no communication port is provided, the above-mentioned main board, on which the general-purpose communication port component is not mounted, is used.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

[0003]

[Problems that the Invention is to Solve In this case, although it is possible to use a main board or without the general-purpose communication port to the common, general-purpose communications port on the main board even those not comprise a general purpose communication port Since the mounting space is secured for the parts for use, the product will inevitably become larger.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004] The present invention has been made in view of the above points, and an object of the present invention is to provide a general-purpose communication port capable of reducing the size while enabling common use of the main board.
It is to provide a programmable controller with a door.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

The present invention comprises a main board, a sub-board electrically connected to the main board via a connector, and a case for accommodating the main board and the sub-board. It is characterized in that general-purpose communication port components are mounted on the sub-board. The general-purpose communication port components are mounted on the sub-board, and the sub-board is connected to the main board and housed in a case together with the main board to provide a general-purpose communication port.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

The electrical connection between the main board 1 and the sub-board 2 is, as shown in FIG.
Alternatively, the connection may be performed by directly connecting the cables 20 to each other. In this case, the cable 3 can be omitted. In any case, pan
When the communication port for use is unnecessary, only the main board 1 may be incorporated without assembling the sub board 2, and if the general-purpose communication port is required, the sub board 2 may be incorporated. Also, if a sub-board 2 'based on another communication standard such as RS485 is prepared,
The general-purpose communication port can be handled by exchanging the sub-boards 2 and 2 '.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010]

As described above, in the present invention, the components of the general-purpose communication port are mounted on the sub-board, and the sub-board is connected to the main board and housed in a case together with the main board. it is, is intended to be attached universal communication port, in order not to implement the components of a general-purpose communications port on the main board, the main board those with general-purpose communication port and pan
Can be used in common with those without a communication port for communication, and at the same time can be reduced in size.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

Further, by preparing a plurality of types of sub-boards having different communication standards, for example, RS232C and RS485, and making them selectable, not only the presence / absence of a general-purpose communication port but also a communication standard (communication system) differs. In this case, the main board can be used in common, and accordingly, one having a plurality of communication standards can be obtained easily and inexpensively.

Claims (6)

[Claims] 1. A main board, a sub-board electrically connected to the main board via a connector, and a case for accommodating the main board and the sub-board. A communication port component is mounted on the sub-board. A programmable controller with a communication port. 2. The programmable controller with a communication port according to claim 1, wherein the main board and the sub-board are connected via a cable. 3. The programmable controller with a communication port according to claim 1, wherein the main board and the sub-board are connected by a connector directly connected to each other. 4. The programmable controller with a communication port according to claim 1, wherein a plurality of types of sub-boards having different communication standards are prepared and selectable. 5. The programmable controller with a communication port according to claim 4, wherein the communication standard is RS232C. 6. The programmable controller with a communication port according to claim 4, wherein the communication standard is RS485.