JP3474146B2 - Electronics - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to an electronic equipment which performs input and output of data between the connected external device.

[0002]

2. Description of the Related Art Conventionally, a measuring instrument for in-line incorporation that transmits measurement data to a control device such as a sequencer for automatic control is known. Usually, a plurality of such measuring instruments for in-line incorporation are often installed in a control device such as a sequencer, and there is a strong demand for downsizing the measuring instruments in order to simplify the installation work.

On the other hand, in such a measuring device, it is necessary to connect an external device such as a gauge for measuring the displacement amount, a printer for printing out, and a presetter for inputting set values. It was

In order to connect a plurality of external devices such as gauges, printers, and presetters, it has been necessary to provide many connectors to which these devices are attached on the rear panel of the measuring instrument.

[0005]

However, arranging many connectors as described above on the rear panel or the like leads to an increase in the size of the measuring device against the demand for miniaturization, and the number of connectors is increased. There was a limit.

Therefore, according to the present invention, various data can be input and output from a plurality of external devices without arranging a connector for each external device and increasing the number of connectors, and miniaturization and various data input and output can be achieved. and to provide an electronic equipment which can meet both of the request.

[0007]

In order to achieve the above object, an electronic device according to claim 1 of the present invention is an electronic device which inputs and outputs data to and from an external device connected to the electronic device. Provided for connecting a signal line connected to an input / output circuit in an electronic device 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 unique output input from the external device via the first and second connectors.
Analog-digital converter that converts input voltage to digital data
A conversion circuit and a selection signal based on the converted digital data.
Signal to generate a specific input / output from among the plurality of input / output circuits.
The decoder circuit for selecting the input circuit and the selection signal
Therefore, between the input / output circuit and the second connector
And a gate circuit which opens and closes the provided signal line .

[0008]

[0009]

Furthermore, the gauge as the external device is connected via the first and second connectors, said gate
It is preferably applied to a counter that counts the pulse signals output from the page . In addition, according to claim 3 of the present invention.
The electronic devices listed above can exchange data with external devices connected to it.
For electronic devices that perform input / output,
From a plurality of signal lines connected to the input circuit and the external device
The electronic device for connecting one to one with a plurality of signal lines
Are installed on the signal lines from the external device.
First connector with multiple connected and connected pins is installed
Freely, one-to-one with the pins of the first connector
A second connector having a plurality of pins to be connected;
Input from the external device via the first and second connectors.
A device identification that identifies the external device based on the input signal.
According to another means and the identified external device, a plurality of the above
Input / output that selects a specific input / output circuit from the input / output circuits
Depending on the circuit selecting means and the selection of the specific input / output circuit
A plurality of signal lines connected to each of the input / output circuits and
I / O to switch connection with multiple pins of the second connector
Force switching means, and the input / output switching means
The pin specifications of the second connector are changed.
To do.

[0011]

[0012]

Thus, various data can be input and output from a plurality of external devices without arranging a connector for each external device and increasing the number of connectors, and downsizing of electronic devices and data input / output can be achieved. Can meet both demands of diversification.

[0014]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the electronic equipment of the present invention will be described. The electronic device of this embodiment is applied to a measuring device (counter) that counts pulse signals output from a gauge that measures a displacement amount.

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

The gauge 14 as an external device outputs a displacement amount as a pulse signal when the tip portion of the gauge 14 is displaced by coming into contact with a work. As a gauge like this,
For example, one having a resolution of 1 μm, a measurement range of 10 mm, and an output pulse number of 10 / μm can be mentioned. still,
The gauge is not limited to the one that outputs the number of pulse signals corresponding to the displacement amount, but various types such as the one that outputs the pulse signal of the cycle corresponding to the displacement amount or the one that outputs the displacement amount itself as digital data can be used. Is.

Further, the printer 16 as an external device is
The measurement data is printed, and various types such as a thermal transfer type, a dot impact type, and an inkjet 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 ten-key pad or the like is arranged on the front surface thereof.

The connector 21 to which the attached connector is detachably attached is attached to the signal line connected to the external device such as the gauge 14, the printer 16 and the presetter 18.
This is a 0-pin connector 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), 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 7th pin of the connector 21 is used to identify the connected external device. The method of identifying the external device will be described later. The remaining two, five,
The 6th pin has different specifications depending on the connected external device.

That is, as shown in FIG. 1A, 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). The 6th pin has a specification of a reset signal (ORG). Further, as shown in FIG. 2B, when the connector 63 of the printer 16 is attached to the connector 21 of the counter 11, the second pin has data (DAT).
A) Pin 5 has a data request (REQ), and pin 6 has an unused specification. 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 strobe (ST
B) signal, the fifth pin has data (DATA), and the sixth pin has an unused specification.

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

The connected device identification circuit 23 comprises 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 it into digital data.
It has a 4-bit resolution so that up to 6 external devices can be connected. The decoder circuit 73 also outputs selection signals (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 that open and close according to a selection signal, and the signals from the counting circuit 28, the printer circuit 33 and the set value input circuit 51 as input / output circuits. Wires are selectively connected to each pin of connector 21.

A gauge 1 is attached to the counter 11 having the above structure.
4 shows the 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 intrinsic voltage (for example, 1.5 V) inside the gauge 14 is A / A inside the counter 11 through the 7th pin of the connector 21.
It is input to the D converter 71. A / D converter 71
This unique voltage is converted to 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 at the same time, the gate circuits 91, 94 and 97 are opened.

As a result, the counting circuit 28 is connected to the connector 2
When the data request signal (REQ) is output to the gauge 14 through the No. 5 pin 1, the three connectors 61 of the gauge 14 are
The clock (CK) signal is input to the counting circuit 28 through the pin No. 2 and the pulse signal (data) is synchronized with this at the same time.
Gauge 1 serially 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 6th 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, a specific voltage (for example, 2.5 V) inside the printer 16 is also stored in the counter 11 through the 7th 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 unique voltage into digital data (for example, "0010"), and the decoder circuit 73
Activates the select 2 signal according to 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 gate circuits 92 and 95 are opened at the same time when the printer output circuit 33 is activated. At this time, the connector 2
The gate circuit 97 connected to the 6th pin of 1 is not selected, and the 6th pin is unused (NC).

Accordingly, when the print data request signal (REQ) is output from the printer 16 through the pin 5 of the connector 63, the clock (CK) signal is output to the printer output circuit 33 through the pin 3 of the connector 21 of the counter 11. Simultaneously with the input, the print data is synchronized with this and the print data is output from the printer output circuit 3 through the pin 2 of the connector 21.
3 is serially transmitted to the printer 16. 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 intrinsic voltage (for example, 3.5 V) inside the presetter 18 is similarly connected inside the counter 11 through the 7th pin of the connector 21. It 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 selection 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 gate circuits 93 and 96 are opened at the same time when the set value input circuit 51 is activated. At this time, the gate circuit 97 connected to the 6th pin of the connector 21 is not selected, and the 6th pin is unused (NC).

As a result, when the strobe (STB) signal is output from the set value input circuit 51 through the pin 2 of the connector 21, the clock (CK) signal is input to the presetter 18 through the pin 3 of the connector 21 of the counter 11. At the same time, in synchronization with this, the preset value data is serially transmitted from the presetter 18 to the preset value input circuit 51 through the fifth pin of the connector 65. Then, when the transmission of the set value data is completed, the set value input circuit 51 causes the target value setting register 47 (1 to 1) selected by the selector 49.
Set the target value in n).

As described above, in the counter 11 of this embodiment, external devices such as the gauge 14, the printer 16 and the presetter 18 can be attached to the common connector 21 for use, and moreover, attached to the connector 21. The external device is identified by the connected device determination circuit 23 based on the unique analog voltage input through the pin 7 of the connector 21, and the input / output circuit (counter circuit, printer output circuit) 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 set value input circuit) is activated. At this time, the gate circuits 91 to 97 in the input / output switching circuit 26 insulate the signal lines from the unselected input / output circuits, so that the signal lines do not interfere with each other.

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

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

Although the above is a description of the embodiments of the present invention, the present invention is not limited to the configurations of these embodiments, and has the functions shown in the claims or the configurations of the embodiments. Any structure can be applied as long as the function can be achieved. For example, in the above-described embodiment, the case where the number of external devices is 3 and the connected device identification circuit 23 can identify up to 16 devices has been described, but the number is not particularly limited. Further, the output peculiar to the external device is not limited to voltage and may be current or pulse signal.
When identifying an external device by the frequency of the pulse signal,
The connected device identification circuit uses an F / F instead of an A / D converter.
It can be identified using a V converter.

When the number of external devices connected is as small as about two, the external device is identified by comparing the device-specific voltage with the reference voltage using a comparator instead of the A / D converter and the decoder. You may.

[0036]

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

[Brief description of 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 showing configurations of an input / output switching circuit and a connected device identification circuit connected to a connector.

[Explanation of symbols]

11 counter 14 gauge 16 Printer 18 presetter 21, 61, 63, 65 connector 23 Connected device identification circuit 26 I / O 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

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G05B 19/02-19/05

Claims (3)

(57) [Claims] 1. An electronic device for inputting / outputting data to / from a connected external device, for connecting a signal line connected to an input / output circuit in the electronic device to a signal line from the external device. And a second connector to which the first connector provided on the signal line from the external device is mounted, and the external device via the first and second connectors .
The unique output voltage input from the
Generates a selection signal based on the analog-to-digital conversion circuit and the converted digital data
A specific input / output circuit among the plurality of input / output circuits
A decoder circuit for selecting, and the input / output circuit and the second circuit according to the selection signal.
Gate that opens and closes the signal line provided between the connector and
An electronic device comprising a circuit . 2. The gauge as the external device is the first gauge.
And through the second connector , said gauge
Claim 1 Symbol mounting electronic equipment characterized in that it is applied to a counter for counting the pulse signals al outputted. 3. Data input / output to / from a connected external device
In an electronic device that outputs, a plurality of signal lines connected to an input / output circuit in the electronic device
And a plurality of signal lines from the external device are connected one to one.
Is installed in the electronic device in order to
Having a plurality of pins respectively connected to a plurality of signal lines
The first connector is freely attachable, and the first connector
Having a plurality of pins connected to the plurality of pins in a one-to-one relationship
2 connector and the external device via the first and second connectors
A device that identifies the external device based on the signal input from
And a plurality of the input / output circuits according to the identified external device.
Input / output circuit selector to select a specific input / output circuit from
Stage and each of the input / output circuits according to the selection of the specific input / output circuit.
A plurality of signal lines connected to the path and the second connector.
Equipped with input / output switching means to switch connection with several pins
For example, the pin of the second connector by said input switching means
Electronic equipment whose specifications are changed .