JP2001306114A - Electronic device and input/output connecting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic device which can meet both requirements, miniaturization and diversification of input/output data by equipping a connector for each outer device and enabling input/output of diversified data from plural outer devices without adding any number of connectors. SOLUTION: Counter 11 has connector 21 connectable to a gauge 14, printer 16 or pre-setter 18, and converts specific voltage transmitted to connector 21 from an outer device to digital data with A/D converter 71. Decoder circuit 73 generates selection 1, 2 or 3 signal corresponding to the converted data, makes counting circuit 28, printer outputting circuit 33 or set value inputting circuit 51 in counter 11 operational, and switches connecting condition of signal cables from each circuit to connector 21 with gate circuit 91-97 in input/output switching circuit 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device for inputting / outputting data to / from a connected external device and a method for connecting the input / output.

[0002]

2. Description of the Related Art Conventionally, there has been known an in-line built-in measuring device for transmitting measurement data to a control device such as a sequencer for performing automatic control. Usually, a plurality of such in-line built-in measuring instruments are often installed in a control device such as a sequencer, and in order to simplify the installation work, there has been a high demand for downsizing of the measuring instruments.

On the other hand, in such a measuring instrument, it is necessary to connect an external device such as a gauge for measuring a displacement, a printer for performing printout, and a presetter for inputting a set value. Was.

In order to connect a plurality of external devices such as a gauge, a printer, and a presetter, many connectors to which these devices are attached must be provided on a rear panel of a measuring instrument.

[0005]

However, arranging many connectors as described above on a rear panel or the like leads to an increase in the size of the measuring instrument in spite of the demand for miniaturization, and the number of connectors is increased. Had limitations.

Therefore, the present invention enables a variety of data input / output from a plurality of external devices without arranging connectors for each external device and increasing the number of connectors. It is an object of the present invention to provide an electronic device and a method of connecting the input and output of the electronic device, which can meet both of the requirements.

[0007]

According to a first aspect of the present invention, there is provided an electronic apparatus for inputting / outputting data to / from a connected external apparatus. A signal line connected to an input / output circuit in the electronic device is provided to connect to a signal line from the external device,
A second connector to which a first connector provided on a signal line from the external device is attached, and a signal input from the external device via the first and second connectors; And an input / output setting changer for changing settings of the input / output circuit connected to the second connector according to the identified external device. .

The input / output setting change means includes an input / output circuit selecting means for selecting the input / output circuit connected to the second connector from a plurality of the input / output circuits, and the selected input / output circuit. It is preferable to include a signal line setting change unit that changes the setting of the signal line connected to the second connector.

Further, the device identification means includes an analog-to-digital conversion circuit for converting a unique output voltage input from the external device into digital data, and the input / output circuit selection means converts the converted digital data to digital data. A decoder circuit for generating a selection signal and selecting the input / output circuit, wherein the signal line setting change means is provided between the input / output circuit and the second connector according to the selection signal. It is preferable to include a gate circuit that opens and closes the signal line.

Further, it is preferable that a gauge as the external device is applied to a counter connected via the first and second connectors.

According to a fifth aspect of the present invention, there is provided a method for connecting an input / output of an electronic device, wherein the signal line connected to an input / output circuit in the electronic device is connected to a signal line from an external device. Attaching a first connector provided on a signal line from the external device to the second connector, and, based on a signal input from the external device via the first and second connectors, Identifying the external device;
Changing the setting of the input / output circuit connected to the second connector according to the identified external device.

In the electronic device of the present invention, the first connector provided on the signal line from the external device is mounted on the second connector of the electronic device, and the first connector is connected to the external device via the first and second connectors. The external device is identified by the device identification means based on the input signal, and the setting of the input / output circuit in the electronic device connected to the second connector is performed by the input / output setting change means in accordance with the identified external device. change.

[0013] Accordingly, various data can be input and output from a plurality of external devices without arranging connectors for each external device and increasing the number of connectors. Can respond to both demands.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an electronic apparatus and an input / output connection method for the same according to the present invention will be described. The electronic device of the present embodiment is applied to a measuring device (counter) that counts a pulse signal output from a gauge that measures a displacement amount.

FIG. 1 is a diagram showing a configuration of a counter according to the embodiment. The counter 11 includes a connector 21 to which a connector attached to a signal line connected to an external device such as a gauge 14, a printer 16 or a presetter 18 is detachably mounted, and a connection for identifying the external device connected to the connector 21. A device identification circuit 23, an input / output switching circuit 26 for switching input / output settings in accordance with the identified external device, a counting circuit 28 for counting pulse signals output from the gauge 14, and a difference between the counted value and a target value. An arithmetic circuit 31 for calculating as output values, a printer output circuit 33 for outputting data such as output values to the printer 16, a display 35 for displaying data such as output values, and a printer output circuit for outputting count values and output destinations of output values. An output selector 37 for switching to either the display 33 or the display 35, a tolerance judgment output circuit 38 for judging a tolerance of an output value, A BCD output circuit 40 for converting and converting a digital output data into BCD data, a resolution setting circuit 44 for setting a resolution for changing a gain of an output value (digital output data), and a D / A for converting digital output data into an analog output voltage A conversion circuit 45, a plurality of target value setting registers 47 in which a plurality of target values are respectively set;
(1 to n), a plurality of target value setting registers 47 (1 to n)
, A set value input circuit 51 for inputting a target value set in each of the target value setting registers 47 (1-n), and an external instruction (RS232).
C, an external selection signal and a key input).

The gauge 14 as an external device outputs a displacement amount when a tip portion of the gauge 14 is displaced by contacting the work as a pulse signal. As such a gauge,
For example, one having a performance of a resolution of 1 μm, a measurement range of 10 mm, and the number of output pulses of 10 / μm can be mentioned. still,
Various types of gauges can be used, such as those that output pulse signals of the number corresponding to the amount of displacement, those that output pulse signals with a cycle corresponding to the amount of displacement, or those that output the amount of displacement itself as digital data. It is.

The printer 16 as an external device is
It prints measurement data, and various types such as a thermal transfer type, a dot impact type, and an ink jet type can be used.

Further, a presetter 18 as an external device
Is used to set a target value in the target value setting register 47 (1 to n), and a numeric keypad or the like is arranged on the front surface thereof.

A connector 21 to which a connector attached to a signal line connected to an external device such as the gauge 14, the printer 16, the presetter 18 or the like is detachably mounted is one of:
This connector is composed of 0 pins, and is provided on the rear panel of the counter 11.

FIG. 2 is a diagram showing signal lines connected to each pin of the connector 21. Pin 1 of connector 21 is ground, pin 3 is clock (CK), pin 4 is unused (NC), pin 8 is unused (NC), and pin 9 is power supply voltage (VCC). The 10th pin is a frame ground (FG), and these have the same specifications regardless of the type of external device to be connected. The seventh pin of the connector 21 is used to identify a connected external device. The method of identifying the external device will be described later. The remaining two, five,
The specification of the sixth pin differs depending on the connected external device.

That is, as shown in FIG. 2A, when the connector 61 of the gauge 14 is attached to the connector 21 of the counter 11, the second pin is data (DATA) and the fifth pin is data request (REQ). , 6th pin have the specification of the reset signal (ORG). When the connector 63 of the printer 16 is attached to the connector 21 of the counter 11 as shown in FIG.
A) The fifth pin is a data request (REQ), and the sixth pin is unused. Further, as shown in FIG.
When the connector 65 of the presetter 18 is attached to the connector 21 of the counter 11, the second pin is connected to the strobe (ST
B) The fifth pin has data (DATA) and the sixth pin is unused.

FIG. 3 is a diagram showing the configuration of the input / output switching circuit 26 and the connected device identification circuit 23 connected to the connector 21. In the drawing, only pins having different specifications depending on the connected external device are shown in the connector 21, and pins having common specifications are omitted.

The connection device identification circuit 23 includes an A / D converter 71 and a decoder circuit 73. The A / D converter 71 inputs a unique analog voltage output from an external device via the 7th pin of the connector 21 and converts the analog voltage into digital data.
It has 4-bit resolution so that up to six external devices can be connected. The decoder circuit 73 outputs a selection signal (selection 1, selection 2, selection 3,...) Based on the digital data converted by the A / D converter 71.

The input / output switching circuit 26 is composed of a plurality of gate circuits 91 to 97 which open and close in response to a selection signal. A wire is selectively connected to each pin of connector 21.

The gauge 1 is attached to the counter 11 having the above configuration.
4. Input / output connection operation when the printer 16 and the presetter 18 are connected. First, when the connector 61 of the gauge 14 is attached to the connector 21 of the counter 11, the specific voltage (for example, 1.5 V) inside the gauge 14 is applied to the A / A in the counter 11 through the seventh pin of the connector 21.
It is input to the D converter 71. A / D converter 71
Converts this unique voltage into digital data (for example, “000
1 "). The decoder circuit 73 activates the selection 1 signal according to the converted digital data.
When the activated selection 1 signal is input to the counting circuit 28 and the gate circuits 91, 94 and 97, the counting circuit 28 is activated and the gate circuits 91, 94 and 97 are opened at the same time.

As a result, the counter 2
When the data request signal (REQ) is output to the gauge 14 through the 5th pin of No. 1, the connector 61 of the gauge 14
A clock (CK) signal is input to the counting circuit 28 through the #th pin, and at the same time, a pulse signal (data) is synchronized with the clock signal.
Is serially gauge 1 through pin 2 of connector 61
4 to the counting circuit 28. When the data transmission is completed, the counting circuit 28 outputs a reset signal (ORG) to the gauge 14 through the sixth pin of the connector 21. When the gauge 14 receives this reset signal (ORG),
Reset the stored measurement data.

Next, when the connector 63 of the printer 16 is attached to the connector 21 of the counter 11, similarly, a unique voltage (for example, 2.5 V) inside the printer 16 is applied to the inside of the counter 11 through the seventh pin of the connector 21. It is input to the A / D converter 71 of the connected device identification circuit 23. A
The / D converter 71 converts this specific voltage into digital data (for example, “0010”),
Activates the select 2 signal with the converted digital data. When the activated selection 2 signal is input to the printer output circuit 33 and the gate circuits 92 and 95, the printer output circuit 33 is activated and the gate circuits 92 and 95 are opened at the same time. At this time, connector 2
The gate circuit 97 connected to the No. 6 pin is not selected, and the No. 6 pin is unused (NC).

When a print data request signal (REQ) is output from the printer 16 through the fifth pin of the connector 63, a clock (CK) signal is sent to the printer output circuit 33 through the third pin of the connector 21 of the counter 11. At the same time as the input, the print data is synchronized with the print data through the second pin of the connector 21 to the printer output circuit 3.
3 is transmitted to the printer 16 serially. And
Printer out is performed by the printer 16.

Further, when the connector 65 of the presetter 18 is attached to the connector 21 of the counter 11, the inherent voltage (for example, 3.5 V) inside the presetter 18 is similarly connected to the connector 21 through the seventh pin of the connector 21. The signal is input to the A / D converter 71 of the device identification circuit 23. The A / D converter 71 converts this specific voltage into digital data (for example, “0011”), and the decoder circuit 73 activates the select 3 signal according to the converted digital data. When the activated selection 3 signal is input to the set value input circuit 51 and the gate circuits 93 and 96, the set value input circuit 51 is activated and the gate circuits 93 and 96 are opened at the same time. At this time, the gate circuit 97 connected to the sixth pin of the connector 21 is not selected, and the sixth pin is unused (NC).

When a strobe (STB) signal is output from the set value input circuit 51 through the second pin of the connector 21, a clock (CK) signal is input to the presetter 18 through the third pin of the connector 21 of the counter 11. At the same time, the set value data is serially transmitted from the presetter 18 to the set value input circuit 51 through the fifth pin of the connector 65 in synchronization with this. Then, when the transmission of the set value data is completed, the set value input circuit 51 sets the target value setting register 47 (1 to 1) selected by the selector 49.
Set a target value in n).

As described above, in the counter 11 of the present embodiment, external devices such as the gauge 14, the printer 16, and the presetter 18 can be mounted on the common connector 21 and used. The external device is identified by the connected device determination circuit 23 based on a unique analog voltage input through the 7th pin of the connector 21, and an input / output circuit (a counting circuit, a printer output circuit, etc.) in the counter 11 corresponding to the identified external device. Alternatively, the input / output switching circuit 26 switches the input / output setting of the signal line connected to each pin of the connector 21 at the same time when the setting value input circuit is activated. At this time, the gate circuits 91 to 97 in the input / output switching circuit 26 make the signal lines from the unselected input / output circuits insulated, so that the signal lines do not interfere with each other.

Therefore, various data can be input / output from a plurality of external devices without arranging connectors on the rear panel of the counter for each external device and increasing the number of connectors. It can meet both demands of output diversification.

In the above embodiment, the data request signal (REQ), the strobe signal (STB), and the reset signal (ORG) are output from the individual input / output circuits for easy understanding. It is preferable in terms of circuit design that these timing signals are output from the same timing circuit.

Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations of the embodiments, but has the functions described in the claims or the configurations of the embodiments. Any configuration that can achieve the function is applicable. For example, in the above embodiment, the case where the number of external devices is three and the connected device identification circuit 23 can identify up to 16 devices is shown, but the number is not particularly limited. The output unique to the external device is not limited to a voltage, but may be a current or a pulse signal.
When identifying the external device by the frequency of the pulse signal,
The connection device identification circuit uses F / D instead of A / D converter.
It can be identified using a V converter.

When the number of external devices to be connected is as small as about two, the external device is identified by comparing a voltage unique to the device with a reference voltage using a comparator instead of an A / D converter and a decoder. May be.

[0036]

According to the present invention, it is possible to input and output various data from a plurality of external devices without arranging connectors for each external device and increasing the number of connectors. It can meet both demands for diversification of data input / output.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a counter according to an embodiment.

FIG. 2 is a diagram showing signal lines connected to respective pins of a connector.

FIG. 3 is a diagram illustrating a configuration of an input / output switching circuit and a connected device identification circuit connected to a connector.

[Explanation of symbols]

 Reference Signs List 11 counter 14 gauge 16 printer 18 presetter 21, 61, 63, 65 connector 23 connected device identification circuit 26 input / output switching circuit 28 counting circuit 33 printer output circuit 51 set value input circuit 71 A / D converter 73 decoder circuit 91-97 gate circuit

Claims (5)

[Claims] 1. An electronic device for inputting / outputting data to / from a connected external device, wherein a signal line connected to an input / output circuit in the electronic device is connected to a signal line from the external device. And a second connector to which a first connector provided on a signal line from the external device is attached, and a signal input from the external device via the first and second connectors. Device identification means for identifying the external device; and input / output setting change means for changing settings of the input / output circuit connected to the second connector according to the identified external device. Electronic equipment characterized by the following. 2. The input / output setting change means includes: an input / output circuit selecting means for selecting the input / output circuit connected to the second connector from a plurality of the input / output circuits; 2. The electronic apparatus according to claim 1, further comprising: a signal line setting change unit configured to change a setting of a signal line connected to the second connector according to an output circuit. 3. The device identification unit includes an analog-to-digital conversion circuit that converts a unique output voltage input from the external device into digital data, and the input / output circuit selection unit converts the converted digital data into digital data. A decoder circuit for generating a selection signal and selecting the input / output circuit, wherein the signal line setting change means is provided between the input / output circuit and the second connector according to the selection signal. 3. The electronic device according to claim 2, comprising a gate circuit for opening and closing the signal line. 4. The system according to claim 1, wherein the gauge as the external device is the first device.
4. The electronic apparatus according to claim 1, wherein the electronic apparatus is applied to a counter connected via a second connector. 5. A signal line from the external device is connected to a second connector of the electronic device provided for connecting a signal line connected to an input / output circuit in the electronic device to a signal line from the external device. Mounting the first connector provided on the external device; identifying the external device based on a signal input from the external device via the first and second connectors; Changing the setting of the input / output circuit connected to the second connector according to the device.