JPH06119011A - Input/output checker for sequencer - Google Patents

Abstract

PURPOSE:To provide the input/output checker of a sequencer capable of immediately recognizing the input/output abnormality of the sequencer. CONSTITUTION:A digital switch 21 is fitted to the input side of the sequencer 10 and a light-emitting diode 22 is fitted to an output side. The digital switch 21 is operated and matched with the input/output terminal number of the sequencer 10 to be checked. Thus, the sensor can be checked when the light- emitting diode 22 us turned on if the sensor 11 or the like is normally operated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a checker for input / output of a sequencer which can easily check the input or output of the sequencer.

[0002]

2. Description of the Related Art FIG. 5 is a diagram for explaining a conventional method for checking the input / output of a sequencer. In this figure, 1
0 is a sequencer, which has input terminals X0 to XD and output terminal Y0
To YD, various sensors 11 are connected to required input terminals X0 to XD, and drive circuits for driving the relay R, the motor M, etc. are connected to the output terminals Y0 to YD. , Illustration is omitted. In addition, 12 is a power supply,
r is a contact of the relay R. Reference numeral 30 indicates a checker, and the connection relationship of the input / output terminals to be checked is displayed on the display surface 31 as an image.

Next, the operation will be described. Conventionally, when checking the operation of an electric signal in a device, the sequencer checker 30 is connected to the sequencer 10 using a cable 40, connectors 41 and 42, and a circuit is monitored to see if the electric signal is in a normal state. Then, the connection state was displayed on the display surface 31 to check the input / output contacts.

[0004]

In the conventional checking method as described above, the check of the input / output operation state of the sequencer 10 is performed by connecting the checker 30 for the sequencer. Therefore, the sensor 11 or the drive circuit is checked. On
There is a problem that it takes a considerable time to check the off operation state.

The present invention has been made in order to solve the above problems, and an object thereof is to obtain a checker for input / output of a sequencer which can immediately confirm an input / output abnormality of the sequencer.

[0006]

A checker for input / output of a sequencer according to the present invention comprises a digital switch provided on the input side of the sequencer for selecting an input terminal of the sequencer, and a display element attached to the common output side of the sequencer. , And a control circuit for turning on the display element when the input / output number of the sequencer selected by the digital switch is normal.

[0007]

In the present invention, when the input terminal of the sequencer to be checked is selected by the digital switch, the display element such as LED is turned on when the operation of the input / output circuit of that number is normal, and the display element is turned on when it is abnormal. Since it is turned off, it is possible to check the operation of the sequencer.

[0008]

1 is a connection diagram showing an embodiment of the present invention. In this figure, 10 is a sequencer to be measured, which has input terminals X0 to X13 and output terminals Y0 to Y5, and a sensor 11 is connected to a required input terminal.
Relays R1 to R4 and a motor M are connected to a drive circuit (not shown) for the output terminals Y0 to Y5. In addition, 12 is a power supply. Reference numeral 20 denotes an input / output checker of the sequencer 10 according to the present invention, which includes a digital switch 21, a light emitting diode 22 and a power supply 23. Then, the digital switch 21 and the input terminals X0 to X0 of the sequencer 10
XF is connected to the output terminal Y0 and the light emitting diode 22.
And are connected.

The digital switch 21 inputs binary numbers and displays them in decimal numbers.
0 to XF are input terminals X10 to X13 and output terminals Y1 to
Used to inspect the contents to find out which number of Y5 is working. For example, when investigating the output terminal Y1, if "0001" is selected by the digital switch 21, if the output terminal Y1 is operating, the output terminal Y0
A program is created so that the light emitting diode 22 of FIG.

FIG. 2 shows the connection of the light emitting diode 22 portion of FIG. 1. When a relay provided inside the sequencer 10 is used and the output terminal Y0 is turned on, the voltage becomes 0 V, and the light emitting diode 22 for checking is used. Turns on.

FIG. 3 is a flowchart showing an example of the operation description. S1 to S5 indicate each step. The operation of the embodiment shown in FIG. 1 will be described with reference to FIG. In this example, it is checked whether the sensor 11 of the input terminal X11 of the sequencer 10 is ON. First, in order to check the input / output state of the sequencer 10, set the input terminal X11 to the digital switch 2
1 is selected by operation and stored in a memory (not shown) (S1). Next, the input / output state of the sequencer 10, that is, whether the sensor 11 connected to the input terminal X11 is ON or OFF is checked and stored in the memory (S2). In the connection of FIG. 4, the contact M1 is the digital switch 21 and the input terminal X.
It turns on when 11 is selected, and the contact M2 is the input terminal X1.
When the sensor 11 connected to 1 is ON, it operates and turns ON.

Both the memory in step (S1) and the number stored in the memory in step (S2) are turned on.
At this time (S3), both contacts M1 and M2 in FIG. 4 are turned on, and the light emitting diode 22 for checking is turned on (S3).
4). If either one of the contacts M1 and M2 is not turned on in step (S3), the light emitting diode 22
Does not light. Hereinafter, if the input terminals X0 to XF are sequentially selected by the digital switch 21, it is possible to check the lighting state of the light emitting diode 22.

In the above embodiment, the light emitting diode 2
Although the result of the check is displayed in 2, any other light emitting element, such as a sounding element, may be used as long as the state can be displayed. Further, the terminal to which the light emitting diode 22 is attached is not limited to the output terminal Y0, and can be assigned by a program anywhere.

[0014]

As described above, according to the present invention, the digital switch provided on the input side of the sequencer for selecting the input terminal of the sequencer, the display element attached to the common output side of the sequencer, and the digital switch are selected. Since the controller has a control circuit that turns on the display element when the input / output number of the sequencer is normal, simply set the input / output conduction state of the sequencer you want to check to the number of the digital switch and the operation is ON. If the display element is O
It becomes N, and the input / output failure judgment can be made early.

[Brief description of drawings]

FIG. 1 is a connection diagram showing an embodiment of the present invention.

FIG. 2 is a circuit diagram of a light emitting diode portion of FIG.

FIG. 3 is a flow chart for explaining the operation of FIG.

FIG. 4 is a connection diagram of main parts for explaining the operation of FIG.

FIG. 5 is a connection diagram showing an example of a conventional sequencer checker.

[Explanation of symbols]

 10 sequencer 11 sensor 20 sequencer input / output checker 21 digital switch 22 light emitting diode

Claims (1)

[Claims] 1. A digital switch provided on an input side of a sequencer for selecting an input terminal of the sequencer, and a display element attached to a common output side of the sequencer.
A checker for input / output of a sequencer, comprising a control circuit for turning on the display element when the input / output number of the sequencer selected by the digital switch is normal.