JPH06167945A - Display device for multi point input/output device - Google Patents

Abstract

PURPOSE:To provide a display device for multi point input/output device which simply performs a wiring check for an input/output device of a contact signal. CONSTITUTION:In a display device for multi point input/output device which is provided with a connector section 10 connected to an external device via a signal line, an operation processing section 30 which turns on/off a contact signal of a corresponding terminal of the connector section, a lighting interface circuit 40 which sends a lighting signal to a lighting element of a display section 20 corresponding to a terminal which is turned on by the arithmetic processing section, the display section is made such block structure as being freely attachable and detachable to the input/output device, connected to the lighting interface circuit via a connector 42 for display, while a wiring test section 50 connected to the connector for display is provided substituting for the display section, a contact output signal by a command signal is suppressed for the arithmetic processing section by the lighting interface circuit, contact output signals of terminals corresponding to the setting of each individual switch are turned on and off, and they are sent to the connector section and checked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input / output device for connecting a large number of signal lines to an external device, and more particularly to an improvement in work for confirming whether wiring work has been performed correctly.

[0002]

2. Description of the Related Art The applicant of the present invention is, for example, Japanese Utility Model Publication No. 2-1782
Japanese Patent Laid-Open Publication No. 9-242242 proposes a lighting display device for input / output signals.
Such devices are used for handling contact signals such as sequencers, but the work of wiring to each terminal is complicated, and the work of inspecting whether this wiring is performed correctly as designed is more complicated. is there. In such an inspection operation, since the terminal block has been conventionally used, it is relatively easy to inspect each terminal using a tester.

[0003]

However, in the equipment adopting the connector connection in order to improve the packaging density and to improve the efficiency of the wiring work, it is necessary to inspect each terminal of the connector due to the structural limitation of the probe of the tester. It is impossible to carry out.
Especially when the device side is an input, the input state is displayed on the display device, so there is little trouble, but when the device side is an output, there is a problem that the display device cannot be relied upon. The present invention solves such a problem, and an object of the present invention is to provide a display device of a multipoint input / output device, which can easily perform wiring inspection of the input / output device of the contact signal.

[0004]

SUMMARY OF THE INVENTION The present invention which achieves such an object is to illuminate a connector section 10 connected to an external device through a signal line and a signal state of each terminal of the connector section. A display unit 20 in which elements are arranged, an arithmetic processing unit 30 for turning on / off a contact signal of a corresponding terminal of a connector unit according to a command signal given from the outside, and a display unit corresponding to a terminal turned on by the arithmetic processing unit. The display device of the multi-point input / output device having the lighting interface circuit 40 for sending the lighting signal to the lighting element of No. 1 has the following configuration.

That is, the display section has a block structure that is attachable to and detachable from the input / output device, and is connected to the lighting interface circuit through the display connector 42, and is connected to the display connector instead of the display section. Inspection unit 50
Is provided. The wiring inspection unit detects the same number of lighting elements 51 as the display unit, individual switches 52 provided in one-to-one correspondence with the lighting elements, a display mode in which all individual switches are turned on, and settings in each individual switch. It has a mode switch 53 for selecting the operating mode to be operated and a mode terminal 54 for sending the state of this mode switch to the lighting interface circuit. Then, when the mode switch is in the operation mode, the lighting interface circuit suppresses the contact output signal by the command signal to the arithmetic processing unit, and the contact output signal of the corresponding terminal according to the setting of each individual switch. Is turned on and off and sent to the connector section.

[0006]

The function of the wiring inspecting unit is that it serves as both the display unit and the display connector, and the output terminals are inspected. When performing an inspection, the lighting interface circuit sends a contact signal to the corresponding terminal of the connector section according to the operation mode selected and the designation by the individual switch. At this time, it is not preferable to compete with the contact signal sent from the arithmetic processing unit to the connector unit, so the contact signal output from the arithmetic processing unit is suppressed. When the display mode is selected, the display unit can be inspected by determining whether the lighting state is the same as that of the display unit.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. Figure 1
FIG. 3 is a perspective view showing the configuration of an embodiment of the present invention. In the figure, an input / output module 1 is in charge of input / output of a contact signal or an analog signal, and is attached to the base unit 2 to form a control system together with other arithmetic modules and power supply modules. The base unit 2 is provided with a bus connector 3 connected to a bus, and is connected to a connector provided on the rear surface of the housing of the input / output module 1. The connector section 10 is provided on the front surface of the housing of the input / output module 1, and there are a terminal block type in which external signal lines are connected one by one and a connector type in which a large number of signal lines are attached at one time. . The display block 20 is attached to the display connector 42 provided on the upper front surface of the housing of the input / output module 1, and is provided with a lighting element such as an LED according to the number of signals connected to the connector unit 10. There are 16 points in 4 rows and 4 columns. The wiring inspection tool 50 is attached to the display connector 42 instead of the display block 20, and is used for inspecting the connection state of each terminal of the connector unit 10, particularly the output terminal. The LEDs 51 are provided in the same number as the number of lighting elements of the display block 20, and the individual switches 52 are provided in one-to-one correspondence with the LEDs 51. The mode switch 53 forcibly turns on all the individual switches 52 to display the LEDs 51 in the same manner as the display block 20, and the connector section 10 corresponding to each individual switch 52 according to the on / off state of each individual switch 52.
The operation mode SW for outputting a contact signal to each terminal of is selected. The tool connector 55 is provided at the end of the connection cable 56 of the wiring inspection tool 50, and is connected to the display connector 42.

FIG. 2 is a block diagram of the entire input / output module. The arithmetic processing unit 30 also has a bus interface function with respect to the internal bus. Here, the signal transmitted via the internal bus is operated according to a predetermined rule and a contact signal is output from the corresponding terminal of the connector unit. The lighting interface circuit 40 lights each lighting element of the display block 20 connected to the display connector 42 in accordance with a contact signal output from the arithmetic processing unit 30, and the wiring inspection unit 50 is attached to the display connector 42. In this case, a contact signal is output from a certain terminal of the connector unit 10 via the switching circuit 44 according to a command from the wiring inspection unit 50. The switching circuit 44 matches the control signals for the terminals of the connector portion 10 of the arithmetic interface circuit 30 and the lighting interface circuit 40 via the diodes. As a general rule, it depends on the signal from the arithmetic circuit 30, but the wiring inspection part is exceptional. When 50 is connected, a control signal is sent to the contact signal output circuit 12 by a signal from the lighting interface circuit 40. The contact signal output circuit 12 outputs a contact signal in a state where the input / output module and the signal line connected to the connector unit 10 are insulated. Here, a photo coupler is used, but a transformer may be used.

FIG. 3 is a configuration diagram of essential parts in a state where a display block is attached to the input / output module. The lighting interface circuit 40 has an LED matrix drive circuit 45, and controls the switch elements 46 provided in each row and the switch elements 47 provided in each column to be turned on and off, thereby making a specific row of the display block 20. The lighting element in a specific column is turned on / off. Here, transistors such as FETs are used for the switch elements 46 and 47, the power supply line Vcc is connected to one end of the row side switch element 46, and the other end is connected to the display block through the terminal of the display connector 42. There is. Further, one end of the column-side switch element 47 is grounded, and the other end is connected to the display block via the terminal of the display connector 42. A resistor R for limiting the LED current is inserted between the power supply line Vcc and the switch element 46, and the LED drive voltage is fed back to the lighting interface circuit 40 via a voltage drop detection amplifier to cause a failure due to a short circuit or the like. Detect that. Mode input A
Is not used in the display block 20, so L is not connected.
It is connected to the ED matrix drive circuit 45.

FIG. 4 is a block diagram of a single lighting element of the display block. Here, an LED is used as a lighting element, and it lights when the switch elements 46 and 47 corresponding to its own row and column are turned on.

FIG. 5 is a configuration diagram of essential parts in a state where the wiring inspection section is mounted on the input / output module. In the wiring inspection unit 50, the mode terminal 54 is connected to the mode input A of the LED matrix drive circuit 45, and the power line Vcc is connected to the mode switch 53. By this mode input A,
The LED matrix drive circuit 45 is the LE of the wiring inspection unit 50.
The display mode for controlling the lighting of D and the operation mode for outputting a contact signal via the switching circuit 44 are switched according to ON / OFF of the individual switches of the wiring inspection unit 50. In the operation mode, output of a contact signal from the LED matrix drive circuit 45 to the arithmetic processing unit 30 via the switching circuit 44 is suppressed.

FIG. 6 is a block diagram of a single lighting element of the wiring inspection section. Here, the LED 51 is used as a lighting element, and it lights when the switch elements 46 and 47 corresponding to its own row and column are turned on. Further, an individual switch 52 is provided in one-to-one correspondence with the LED, and in the operation mode, a contact signal is output to the terminal of the connector section 10 corresponding to this matrix position depending on the setting made by the individual switch 52. As a result, it can be confirmed whether the specified contact signal is output to the specific terminal of the connector section 10.

In the above embodiment, the mode switch 53 is provided so that the wiring inspection section 50 can also be used as a display block. However, it may be omitted if only the contact signal output inspection is performed.

[0014]

As described above, according to the present invention, by operating the individual switches of the wiring inspection device 50, it is possible to confirm the on / off state at the wiring destination without inspecting the wiring of the connector section and inspect it. Work can be done easily. When the wiring inspection device 50 is connected to the display connector 42 via the connection cable as in the embodiment, the output state of the module can be monitored at a remote place, and the module can be mounted in a place that is difficult to see. Even if there is, there is an effect that inspection work can be performed.

[Brief description of drawings]

FIG. 1 is a configuration perspective view showing an embodiment of the present invention.

FIG. 2 is a configuration block diagram of an entire input / output module.

FIG. 3 is a main part configuration diagram in a state where a display block is attached to an input / output module.

FIG. 4 is a configuration diagram of a single lighting element of a display block.

FIG. 5 is a configuration diagram of main parts in a state where a wiring inspection unit is attached to the input / output module.

FIG. 6 is a configuration diagram of a single lighting element of a wiring inspection unit.

[Explanation of symbols]

 10 Connector Section (Output Terminal Block) 12 Contact Signal Output Circuit 20 Display Section (Display Block) 30 Arithmetic Processing Section 40 Lighting Interface Circuit 42 Display Connector 44 Switching Circuit 45 LED Matrix Drive Circuit 48 Mode Input 50 Wiring Inspection Section 52 Individual Switch 53 Mode switch

Claims (1)

[Claims] 1. A connector section (10) connected to an external device through a signal line, and a display section (20) on which a lighting element for displaying a signal state of each terminal of the connector section is arranged.
An arithmetic processing unit (30) for turning on and off a contact signal of a corresponding terminal of the connector unit according to a command signal given from the outside.
And a lighting interface circuit (40) for sending a lighting signal to a lighting element of the display unit corresponding to a terminal turned on by the arithmetic processing unit, wherein the display unit is the input / output device. It has a block structure that can be freely attached to and detached from the lighting interface circuit and display connector (4
2) and a wiring inspection unit (50) connected to the display connector instead of the display unit, the wiring inspection unit having the same number of lighting elements (51) as the display unit, An individual switch (52) provided in one-to-one correspondence with this lighting element, a mode switch (53) that adopts a display mode in which all the individual switches are turned on and an operation mode in which the setting in each individual switch is detected.
And a mode terminal (54) for sending the state of the mode switch to the lighting interface circuit. When the mode switch is in the operation mode, the lighting interface circuit outputs a contact output signal by a command signal to the arithmetic processing unit. The display device for a multipoint input / output device is characterized in that the contact output signal of the corresponding terminal is turned on / off according to the setting of each individual switch and sent to the connector section.