JPH061426B2 - Operation switch circuit - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation switch circuit such as an operation panel in production equipment.

Conventional technology Conventionally, the operation panel used for production equipment is wired to each switch and connected in parallel to the control device, or a switch matrix is assembled and each switch is coded to control device in parallel or serial. The method of transfer was common.

The conventional technique will be described with reference to FIGS. 4 and 5. FIG. 4 is a circuit of a general operation panel, which is an operation circuit including switches 101 and 102 and a rotary switch 103, and 12 common lines (GND) and 11 signal lines are connected to the control device 3 for processing.

In FIG. 5, each switch assembled in the switch matrix is coded, and the input signal 14 input by the timing signal 13 is coded by the switch decoding circuit 2 and output.

Problems to be Solved by the Invention In such a conventional circuit, the number of wires increases as the number of switches increases as shown in FIG. 4, and the code is generated only when the switches are pressed as shown in FIG. However, there is a drawback in that it is not possible to deal with the control in which the state of the switch is always input and processed only by the output.

The present invention has been made in view of the above points, and an object thereof is to provide a switch circuit with a simple configuration and capable of saving wiring.

Means for Solving the Problems In order to solve the above problems, according to the present invention, once a switch incorporated in a switch matrix is turned on, the same code data is sent until another switch is turned on next. The first switch group is set and the second switch group is set to send the corresponding code data as long as it is in the ON state.

Operation With the above configuration, the first function of continuously outputting the same code data until the next another switch is turned ON once it is turned ON, and the corresponding code is provided as long as the switch is ON. It has a second function of outputting data at the same time, and sends each data to the control device using two serial transfers.

Embodiment FIG. 1 is a block diagram showing an embodiment of the switch circuit of the present invention.

Reference numeral 1 denotes a switch matrix circuit, in which once the switch is turned on, a first switch group 1a set to continuously output the same code data until another switch is turned on, and the switch is turned on. And a second switch group 1b set to output the corresponding code data only during the period. Reference numeral 4 is a one-chip microcomputer that performs signal processing.

The 1-chip microcomputer 4 has 15, 16, 17, 18, and 19 signal lines and is connected to one switch matrix circuit, and generates and inputs a plurality of timing signals to two switch groups 1a and 1b. The timing signal generator 4a and the first switch group 1a of the two switch groups 1a and 1b are newly turned on via a timing signal.
Based on the detection of the presence / absence of the switch in the first detection unit 4b that detects the presence / absence of the switch in the N state, the corresponding code data if there is a new switch in the ON state based on the detection of the presence / absence of the switch in the first detection unit 4b. Is serially transferred to the control circuit (not shown) and serially transfers the code data being output to the control circuit (not shown) unless there is a newly turned on switch, and the two switch groups 1a. , 1b of the second switch group 1b, the second detection unit 4d for detecting the switch in the ON state via the timing signal.
Then, based on the detection of the presence or absence of the switch in the second detection unit 4b, the corresponding code data is continuously serially transferred to the control circuit (not shown) as long as it is in the ON state. It comprises a transfer unit 4e.

The one-chip microcomputer 4 generates the timing signals of (a), (b), (c) and (d) in FIG. 3 and inputs the state of the switch matrix of 1. Each switch is coded as shown in FIG. 3 (f), and the "1" to "8" are used as one switch group and the other "9" to "G" are used as another switch group. To do.

"1", "5", "9", "D" are input to the one-chip microcomputer 4 at the timing of FIG. 3 (a), and (b)
At the timing of "2", "6", "A", "E",
At the timing of (c), "3", "7", "B",
At the timing of "F", (d), "4", "8",
"C" and "G".

If the "1" switch is pressed, the input status of the one-chip microcomputer 4 is as shown in FIG. 3 (e). The 1-chip microcomputer 4 outputs 5 after generating the timing signals shown in FIGS. 2 (a) to (d).
"1" in the switch "1" to "8" through 1
If it is ON, it is serially output as shown in FIG. 3 (i). Further, the code data of the key code “1” is serially output via the output 52.

Next, assuming that the switch "A" is pressed, the situation of the one-chip microcomputer 4 is as shown in FIG. 3 (g).

The 1-chip microcomputer 4 judges that there is no newly pressed switch in the switch group of "1" to "8", and outputs the information that the data "1" is ON as before via the output 51. To do. Further, the key code data of "A" is output via the output 52.

Next, assuming that the switches "2" and "D" are pressed, the input status of the one-chip microcomputer 4 becomes as shown in FIG. 3 (h).

The one-chip microcomputer 4 determines that a switch is newly pressed in the switch group of "1" to "8" and outputs the information that the switch "2" is ON via the output 51.

Further, the key code data of "D" is output via the output 52.

As described above, the 1-chip microcomputer 4 is "1"-
The "8" switch group continues to output the same data until a new switch is pressed, and functions as a general rotary switch, and the other switch groups output key code data each time the switch is pressed. .

These outputs are sent to the control device 6 as shown in FIG. In the control device of No. 6, each switch output can be converted from serial to parallel, and can be processed as a normal switch circuit as the control device.

EFFECTS OF THE INVENTION As described above, according to the present invention, an operation switch circuit capable of wiring saving can be formed with an extremely simple circuit configuration, which is extremely useful in practice.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an operation switch circuit according to an embodiment of the present invention, FIG. 2 is a connection diagram of the operation switch circuit and a control device, FIG. 3 is a timing diagram in the present invention, FIG. 4 and FIG. FIG. 6 is a configuration diagram of a conventional circuit. 1 ... Switch matrix circuit, 2 ... Switch decoder circuit, 3 ... Control device.

Claims (1)

[Claims] 1. An operation switch circuit for transferring an input signal to a control circuit for controlling a device, once pressed, the switch is continuously turned on until another switch is pressed next, A first switch group set to continuously send corresponding code data during that time, and a second switch set to send the corresponding code data only in that state while being turned on only while the switch is continuously pressed. A group of switches configured in a matrix, a timing signal generator that generates and inputs a plurality of timing signals for the switch group, and a first switch group of the switch group ,
A first detector that detects the presence or absence of a switch that is newly turned on via the timing signal, and a switch that is newly turned on based on the detection of the presence or absence of a switch by the first detector. If there is, the corresponding code data is serially transferred, while if there is no switch newly turned on, a first transfer unit that continuously transfers the code data being output to the control circuit serially, and the switch group. Of the second switch group,
A second detection unit that detects the switch in the ON state via the timing signal, and corresponding code data only while in the ON state, based on the detection of the presence or absence of the switch in the second detection unit. And a second transfer unit for serially transferring to the control circuit.