JPH05204418A - Input/output unit for programable controller - Google Patents

Abstract

PURPOSE:To unnecessitate another device such as a programer, etc., and to simply and easily recognize an address by permitting a unit to have a function for selecting the on/off state of an external input/output unit and the address of the unit itself so as to display it. CONSTITUTION:The input/output unit 4 is provided with a display equipment 5 and a data/address changing-over switch 6 and a communication control part 11 is provided inside the input/output unit 4. When the change-over switch 6 is operated to a data side, the on/off state of the external input/output unit is displayed in the display equipment 5 by the communication control part 11. When the switch 6 is operated to the address side, the byte address of the input/output unit 4 itself is displayed in the display equipment 5 by the communication control part 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input / output unit detachably mounted on a build-up type programmable controller.

[0002]

2. Description of the Related Art A typical prior art schematic structure of a build-up programmable controller is shown in FIG. The input / output unit mounting portion 1 provided in the main body of the programmable controller is provided with, for example, 13 slots indicated by slot numbers 0 to 9 and A to C, and the power source unit is provided in the slot of slot number 0. Two
However, the control unit 3 which controls centralized control is provided in the slot of slot number 1, and the slot numbers 2 to 9 and A to
An input / output unit 4 is detachably attached to each slot of C, and each input / output unit 4 is pushed into a predetermined position to be attached to the power supply unit 2 and the control unit 3 and an external unit (not shown). On
It is adapted to be electrically connected to the output device.

By the way, when it is desired to know the unique address of a certain input / output unit 4, for example, the input / output unit 4 shown by hatching the slot number 7, the control unit 3 can be operated by a programmer or the like. The support tool 13 is connected, and the key operation of the key operation unit 14 is performed by, for example, an 11-step key “I-H” shown in FIG.
The rack number R: 0 and the slot number S: 7 are designated in this order, and the leading byte address of the input / output unit 4 (0124) is displayed on the display unit 15 of the support tool 13.

[0004]

In the conventional device described above, data cannot be displayed unless a dedicated support tool 13 is provided separately from the main body of the programmable controller, resulting in high device cost. Further, the operation itself of the support tool 13 is considerably complicated, and it takes time and the handling is troublesome.

An object of the present invention is to provide a display function in this kind of input / output unit itself and a display switching function capable of selecting the contents to be displayed as data and address, so that a switch operation can be performed. Input / output device on /
Programmable that allows easy and reliable visual confirmation of the off state or the address of the unit, and facilitates handling
It is to provide an input / output unit for the controller.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a light emitting device in a control unit and an input / output unit which is connected to a corresponding external input / output device by being removably attached to a main body of a programmable controller. A display unit including a display unit such as a diode group, a changeover switch operable to switch between a data side outputting a data indication signal and an address side outputting an address indication signal, and a data indication connected to the control unit. A communication control means which receives a signal and sends an output for displaying the ON / OFF state of the input / output device to the display means, and which receives an address indication signal and sends an output for displaying the byte address of the input / output unit itself to the display means. It is an input / output unit of a programmable controller characterized by including and.

[0007]

According to the present invention having the above-mentioned means, the change-over switch is normally set to the data side so that the ON / OFF state of the external input / output device connected thereto is displayed. Can be displayed on. If you want to know the byte address of the input / output unit, change the selector switch to the address side. As a result, the byte address of the input / output unit itself is displayed on the display means, which is different from the input / output device ON / OFF state up to now.

In this way, it is not necessary to use a separate device such as using a dedicated support tool, and desired information can be easily and quickly viewed simply by operating the changeover switch provided.

[0009]

1 is a schematic structural diagram of an input / output unit mounting portion 1 in a programmable controller according to an embodiment of the present invention. FIG. 2 is an enlarged view of a main part of one input / output unit 4 in FIG. In each input / output unit 4, the logic of sequence control having a complicated circuit configuration is digitalized and stored as a unit for each system. The input / output unit 4 has a light emitting diode (L
The display means 5 which is realized by a display device including an ED) group is provided, and a changeover switch 6 is attached to the front surface of the lower portion of the display device 5.

The display unit 5 is provided with four columns of display units that can be expressed in octal on an 8-bit light emitting diode.
A maximum of 256 × 8 = 2048 addresses can be displayed.

On the other hand, as the changeover switch 6, for example, a slide type switch is used, and the "knob" can be set to the address side by sliding to the right side and to the data side by sliding to the left side. The address instruction signal (contact ON) is output at, and the data instruction signal (contact ON) is output at the data side.

The input / output unit 4 provided with the display 5 and the changeover switch 6 on the front surface is detachably mounted in a predetermined slot of the input / output unit mounting portion 1, so that the power supply unit 2 and the control unit 3 are provided. , Is electrically connected to an external input / output device, and controls the external input / output device by an internal sequence control circuit.

FIG. 3 is a block electric circuit diagram of the input / output unit 4 in the embodiment of FIG. Output unit 4
Is an interface 7 connected to the control unit 3 by an input / output bus and a control signal line, and an external input / output.
Output device eg voltage connected to relay contact group 12 /
An input circuit 8 for current conversion, for example, a photocoupler circuit 9 which is formed by a combination of a light emitting diode and a phototransistor, insulates the output of the input circuit 8, transmits the level-converted signal, and receives the output of the photocoupler circuit 9. A multiplexer 10 for processing and transferring signals, an interface 7, and a communication control unit 11 implemented by a multiplexer for receiving and processing information from the multiplexer 10 are provided, and further, a display 5 and a changeover switch 6 are provided. Be prepared. The communication control unit 11 is formed in a control circuit for processing based on the information from the control unit 3 and the information from the relay contact group 12 and transferring it to the display 5 as a display output.

In the programmable controller having the above structure, the changeover switch 6 is usually set on the data side. The set state of the changeover switch 6 is read by the control unit 3. Since the change-over switch 6 is normally set to the data side, the communication control unit 11 operates to display information from the multiplexer 10, that is, a signal corresponding to the on / off state of each contact in the relay contact group 12. 5, and this state is displayed on the display 5 by turning on and off.

On the other hand, when the changeover switch 6 is set to the address side, the control unit 3 reads this set state and operates the communication control section 11.
When the communication control unit 11 operates, the leading byte address indicated by, for example, “K0124” is output to the display device 5 by digital calculation. Since this byte address is realized in octal by an 8-bit LED, it can correspond to a maximum of 2,048 points (co0000 to co0377) of the input / output device 12, as described above.

As described above, the on / off state of the external input / output device 12 and the byte address of the input / output unit itself can be switched and displayed on the display unit 5 only by the switching operation of the changeover switch 6.

[0017]

As described above, according to the present invention,
Just by operating the selector switch 6 provided on the output unit,
The byte address of the input / output unit itself and the on / off state of the input / output device can be switched and displayed on the display section of the unit, and it is not necessary to follow the address of the input / output unit in order. In addition, the troublesome operations such as using a dedicated support tool are omitted, and you can easily and quickly check the address of the input / output unit you want to know.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic structure of an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of the input / output unit 4 shown in FIG.

3 is a block electric circuit diagram of the input / output unit 4 shown in FIG.

FIG. 4 is a front view showing a schematic structure of a conventional programmable controller.

5 is an explanatory diagram of an operation procedure of the programmer 13 shown in FIG.

[Explanation of symbols]

 3 Control Unit 4 Input / Output Unit 5 Display 6 Changeover Switch 11 Communication Control Section 12 Input / Output Device

Claims (1)

[Claims] 1. A control unit and an input / output unit which is connected to a corresponding external input / output device by being removably mounted on a main body of a programmable controller, which comprises a display such as a light emitting diode group. Display means, a changeover switch operable to switch between a data side for outputting a data instruction signal and an address side for outputting an address instruction signal, and a control unit connected to the input / output for receiving a data instruction signal. A communication control means for sending an output for displaying the on / off state of the device to the display means, and for sending an output for receiving the address indication signal and displaying the byte address of the input / output unit itself to the display means. Input / output unit of programmable controller.