JPH07210581A - Input/output switching device - Google Patents

Abstract

PURPOSE:To efficiently perform the data writing work of a slave data input/ output device such as a portable terminal equipment due to data transmitted from a master data input/output device such as a miniaturized computer or the data fetching work of the master data input/output device due to data transmitted from the slave data input/output device. CONSTITUTION:In order to selectively receive the writing data transmitted from a personal computer 1 at any arbitrary one of portable terminal equipments 4 (a, b and c) and to write those data, a transmission line Lo is conductively connected with any one of transmission lines Lao, Lbo and Lco by opening a short-circuit connection switch 5 and switching a transmission changeover switch 6 corresponding to a switching control signal from a switch changeover control part 3. On the other hand, the data are simultaneously and parallelly transmitted to the portable terminal equipments 4a, 4b and 4c. When it is desired to efficiently write the same data, the short-circuit connection switch 5 is closed corresponding to the switching control signal from the switch changeover control part 3, and the transmission line Lo is conductively connected with all the transmission lines Lao, Lbo and Lco.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parent data input / output device such as a personal computer for reading and outputting data from a storage device or storing input data in the storage device, and a function similar to the parent data input / output device. The present invention relates to an input / output switching device that is connected to a plurality of child data input / output devices such as portable terminals and that can switch the connection state between the input / output devices.

[0002]

2. Description of the Related Art For example, when performing maintenance / inspection of building equipment such as elevators and escalators, the data can be carried from a small computer that stores reference data necessary for maintenance / inspection of the building equipment. Write to the mobile terminal, bring the mobile terminal to the work site and display the data on the display board etc. so that the worker can perform appropriate and reliable maintenance and inspection work, as well as maintenance and inspection work. The operator inputs the data obtained by the operation of the operation panel of the portable terminal and stores it, and then returns to work to transfer the data obtained by the maintenance and inspection work to the small computer. Work data input / output devices are known. By the way, generally, a large number of portable terminals are assigned to one small computer used as such a cyclic work data input / output device, and data is written from the small computer to the portable terminal or the portable terminal is used. When transferring the maintenance / inspection work data stored in the machine to a small computer, each portable terminal was connected to the small computer to write and transfer the data.

[0003]

In the case where a large number of portable terminals are assigned, the above-mentioned steps for individual portable terminals are not limited to the case where a small number of portable terminals are assigned to one small computer. It takes a long time to write the data or transfer it to the small computer, which puts a lot of effort on the operator of the small computer. However, even if a large number of portable terminals are assigned to one small computer, the data written in the portable terminals are often the same. In such a case, the same data writing operation will be repeated many times,
The work efficiency is poor, and the number of portable terminals to be written may vary depending on the data, which makes the work complicated. The present invention has been made in order to solve the above problems in the prior art, and writes data in a child data input / output device such as a portable terminal by data transmitted from a parent data input / output device such as a small computer. An object of the present invention is to provide an input / output switching device capable of efficiently performing work and data fetching work of a parent data input / output device by data sent from a child data input / output device.

[0004]

In order to solve the above-mentioned problems, the present invention comprises a storage device, and parent data input / output for reading data from the storage device and outputting it or storing input data in the storage device. An input / output device to which a device and a plurality of child data input / output devices having the same function as the parent data input / output device are connected, and the connection state of the parent data input / output device and the child data input / output device can be switched The switching device has a connection switching means for selecting any one of the plurality of child data input / output devices and connecting it to the parent data input / output device.

Further, preferably, when the data output from the parent data input / output device is relayed and output to the child data input / output device, the parent data input / output device and all the child data input / output devices are bundled together. It has a collective connecting means for connecting by connecting.

[0006]

The connection switching means selects any one of the plurality of child data input / output devices, connects it to the parent data input / output device, and transmits / receives data to / from the parent data input / output device. It facilitates the work of writing data and the work of fetching data from the parent data input / output device. In a preferred means, when relaying the data output from the parent data input / output device and outputting the data to the child data input / output device, the collective connecting means collectively connects the parent data input / output device and all the child data input / output devices. The data sent from the parent data input / output device can be output in parallel to all the child data input / output devices connected to one side and stored in the respective storage devices.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. 1 is a block diagram showing a system configuration according to a first embodiment of the present invention. In FIG. 1, 1 is a personal computer for storing data necessary for maintenance / inspection, and storing and accumulating data of maintenance / inspection work results. 2 is connected to a personal computer 1 and three portable terminals described later. A communication control device capable of performing parallel writing of the portable terminal device, 3 is a switch switching control unit that controls switching of each switch described later in the communication control device 2, 4 (a, b, c)
Is a portable terminal for writing data necessary for maintenance / inspection from the personal computer 1 and storing the data of maintenance / inspection work results in the personal computer 1, 5 is a short-circuit connection switch, 6 is a transmission changeover switch, and 7 is reception changeover It is a switch.
The personal computer 1 and the communication control device 2 are wired and connected via the input / output connectors CN1 _i , CN1 _o of the personal computer 1 and the input / output connectors CN2 _i , CN2 _o of the communication control device 2, and the communication control device 2 and the portable terminal are connected. Machines 4a, 4b, 4
c is an input / output connector CN2 _ai , CN of the communication control device 2
2 _ao , CN2 _bi , CN2 _bo and CN2 _ci , CN2
_co and input / output connectors CN4 _ai , CN4 _ao , CN4 _bi , CN4 _bo and CN of the portable terminals 4a, 4b, 4c
Wiring can be respectively connected via 4 _ci and CN4 _co . Input connector CN2 _i of communication control device 2
The transmission path L _o connected to is connected to the short-circuit connection switch 5 and the transmission changeover switch 6, and is connected to the output connector CN.
The reception path L _i connected to 2 _o is the reception switch 7
It is connected to the. Further, connected shorted connection switch 5 and the three output terminals of the transmission change-over switch 6 is connected in parallel each transmission path L _ao, the L _bo and L _co the via output connector CN2 _ao, CN2 _bo and CN2 _co respectively There is. Also, three output terminals of the reception change-over switch 7 is connected to the receive path L _ai, input connector via the L _bi and L _ci CN2 _ai, CN2 _bi and CN2 _ci. The short-circuit connection switch 5, the transmission changeover switch 6, and the reception changeover switch 7 are connected to the control wiring from the switch changeover control unit 3, and the changeover is controlled by a changeover control signal from the switch changeover control unit 3. That is, by the switching control signal from the switch switching control unit 3, the three portable terminals 4 (a, b, c)
Select any one of the mobile terminals 4 to send / receive data to / from the mobile terminal 4 or simultaneously parallel to the three mobile terminals 4a, 4b, 4c. The data can be sent in a dynamic manner.

Next, the operation of the embodiment will be described. Write data sent from the personal computer 1 to the three portable terminals 4
In order to selectively cause any one of the portable terminals 4 in (a, b, c) to selectively receive and to perform the writing operation in the portable terminal 4, the switching control from the switch switching control unit 3 is performed. the signal, dissipate open the short-circuit connection switch 5, let me switch the transmission changeover switch 6, the transmission path L _o and the output connector CN2 of the communication control device 2 _ao, CN2 _bo and CN2 transmission path L _ao respectively connected to _co , L _bo
And either of L _co and L _co are conductively connected. As a result, the write data sent from the personal computer 1 is transmitted to the desired portable terminal 4 and stored in the internal storage device. On the other hand, when it is desired to simultaneously transmit data in parallel to the three portable terminals 4a, 4b, 4c to efficiently write the same data, the switching control signal from the switch switching control unit 3 is used. , The short-circuit connection switch 5 is closed, and the transmission path L _o and all the transmission paths L _ao , L _bo
And _Lco are conductively connected. With this, PC 1
The write data sent from the three portable terminals 4
a, 4b, 4c, and are stored in the respective internal storage devices. In addition, three portable terminals 4 (a,
When the data of the maintenance / inspection work result sent from any one of the portable terminals 4 in b) and c) is transmitted to the personal computer 1, it is received by the switching control signal from the switch switching control unit 3. The changeover switch 7 is switched to conductively connect one of the reception paths L _ai , L _bi and L _ci connected to the input connectors CN2 _ai , CN2 _bi and CN2 _ci of the communication control device 2 to the reception path L _i. Let
As a result, the maintenance / inspection work result data stored in the storage device of the desired portable terminal 4 is transmitted to the personal computer 1 via the reception path L _i and stored in an internal storage device (not shown). At this time, the short-circuit connection switch 5 is open.

Next, the write data sent from the personal computer 1 is simultaneously transmitted in parallel to all the portable terminals 4 (a, b, c) connected to the communication control device 2 for exclusive efficiency. A second embodiment of the present invention will be described in which a specific write operation is performed. FIG. 2 is a block diagram showing the system configuration according to the second embodiment of the present invention. In FIG. 2, parts that are the same as or considered to be the same as the circuit elements of the first embodiment shown in FIG. As shown in FIG. 2, in this embodiment, the short-circuit connection switch 5 and the transmission changeover switch 6 in the first embodiment shown in FIG. 1 are omitted. The writing operation to the portable terminal 4 (a, b, c) of this embodiment is the same as the writing operation when the short-circuit connection switch 5 is closed in the first embodiment. Therefore, in the present embodiment, when it is desired to selectively write the write data sent from the personal computer 1 to the portable terminal 4 (a, b, c), the portable terminal is the same as in the conventional example. It suffices to connect the communication control devices 2 to the communication control device 2 one by one to perform the write operation. The data fetching operation for transmitting the data of the maintenance / inspection work result to the personal computer 1 for registration is the same as that of the first embodiment. The present embodiment has an advantage that the manufacturing unit price can be reduced as compared with the first embodiment because the structure is simplified.

[0010]

As described above, according to the invention described in claim 1, any one of the plurality of child data input / output devices connected to one side is selected and the parent data connected to the other side is selected. Since it has the connection switching means for connecting to the input / output device, simply switching the connection switching means switches the connection between the plurality of child data input / output devices connected to one side and the parent data input / output device connected to the other side. The data writing operation of the child data I / O device and the data fetching operation of the parent data I / O device can be efficiently performed by mutually transmitting and receiving data. According to the invention described in claim 2, when the data output from the parent data input / output device is relayed and output to the child data input / output device, the parent data input / output device and all the child data input / output devices are bundled together. Since it has a collective connection means for connecting in parallel, the data sent from the parent data input / output device can be output in parallel to all the child data input / output devices connected to one side and stored in the respective storage devices. Therefore, it is possible to extremely efficiently write the same data to the child data input / output device. According to the invention of claim 3, the connection switching means relays the data output from the child data input / output device and outputs the data to the parent data input / output device, and the parent data input / output device and the child data input / output device. Since the connection state of the parent data input / output device is switched, the connection with a plurality of child data input / output devices connected to one side can be switched to efficiently perform the work of fetching the data of the parent data input / output device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a system configuration according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a system configuration according to a second embodiment of the present invention.

[Explanation of symbols]

1 PC 2 communication control unit 3 switches the switching control unit 4 (a, b, c) portable terminal 5 short connection switch 6 sends changeover switch 7 receiving changeover switch _{L o, L ao, L bo} , L co transmission path L _i , L _ai , L _bi , L _ci reception path

Claims (3)

[Claims] 1. A parent data input / output device comprising a storage device for reading and outputting data from the storage device and storing input data in the storage device, and a function similar to the parent data input / output device. A plurality of child data input / output devices are connected, and an input / output switching device capable of switching the connection state of the parent data input / output device and the child data input / output device, An input / output switching device having a connection switching means for selecting any one and connecting it to the parent data input / output device. 2. When the data output from the parent data input / output device is relayed and output to the child data input / output device, the parent data input / output device and all the child data input / output devices are collectively connected. 2. The input / output switching device according to claim 1, further comprising a collective connection means for performing the same. 3. A connection state between the parent data input / output device and the child data input / output device when the connection switching means relays the data output from the child data input / output device and outputs the data to the parent data input / output device. The input / output switching device according to claim 1 or 2, wherein the input / output switching device is for switching between the two.