JPS5835603A - input circuit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an input circuit that inputs a signal for modifying a program to an electronic control unit that controls a load according to a predetermined program.

BACKGROUND ART Currently, household electrical appliances are widely available on the market that are equipped with electronic control units that control devices according to the order, time, etc. of processes predetermined by the user.

For example, an electric washing machine equipped with such an electronic control unit can perform a series of operations from washing to spin-drying, or only spin-dry, depending on the user's wishes. .

However, in order to faithfully execute the operation set by the user, such an electric washing machine, for example, should be set to wash → rinse → spin, but the user mistakenly selects washing →
If you make meaningless settings such as dehydration without rinsing, the settings will be executed faithfully.

In addition, such settings are made by changing the connection state of the mechanical contacts in the input setting switch and outputting a signal corresponding to the connection state to the electronic control unit. There was a risk that the signal output during chattering would be input to the electronic control unit, causing the equipment to malfunction.

In order to solve the above-mentioned drawbacks, the present invention has been made to prevent the signal output from the input setting switch when the user makes an incorrect setting and the signal output when the input setting switch is chattering to be input to the electronic control unit. to prevent
The present invention provides an input circuit that can input only correctly set signals to an electronic control unit. Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing the basic configuration of the present invention, in which l is an electronic control unit that controls the load unit 2 according to a predetermined program, and 3 is an electronic control unit that controls the program such as process order, time, etc. An input setting switch section 4 having a mechanical contact for setting a signal stores the output signal of the input setting switch section 3 at every predetermined sampling time, and outputs the stored signal until the next sampling time. A first storage means 5 determines whether the output signal of the input setting switch section 3 and the output signal of the first storage means 4 match or not, and outputs a match signal when they match. The coincidence determination means 1 and 6 start operating when a coincidence signal is output from the first coincidence determination means 5, and
The counter returns to its initial state when the coincidence determining means 5 stops outputting the coincidence signal. Here, the counter 6 counts the number of samplings in synchronization with the sampling time while the coincidence signal is being output, and the number of times is a predetermined value (a value determined in consideration of the chattering time). When this happens, the output is inverted.

7 is a second storage means that stores the output signal of the first storage means 4 at the time when the output of the counter 6 is inverted, and outputs the stored signal to the electronic control unit l; o8 is a predetermined A prohibition human power storage means for storing a human power prohibition signal and outputting the signal; 9 is an input setting switch 3;
It is determined whether or not the output signal of the inhibit input storage means 8 matches the output signal of the inhibit input storage means 8. If they match, the counter 6
The second match determining means outputs a reset signal to the second match determining means.

Here, the output signal of the second coincidence determination means 9 is also output to the electronic control section 1, and at the time when the reset signal is output, the electronic control section 1 controls the load BI1 so that the user can On the other hand, the electronic control unit 1 is notified that the currently set information cannot be manually operated.

In the input circuit according to the present invention configured as described above, when the user completes the setting operation and the chattering subsides, the output of the input setting switch 3 becomes stable and the counter 6
starts counting the number of samplings. Therefore, if the set signal is a correct signal, the counter 6 continues counting, and when it reaches a predetermined value, its output is inverted, so that the second storage means 7 stores the correct signal. The signal is stored and output to the electronic control unit 1. If the set signal is incorrect, a reset signal is output from the second coincidence determination means 9, and the counter 6 does not count the number of sampling times. The storage means does not store this erroneous signal, and further controls the electronic control load section 2 to notify the user that the set information is incorrect. Examples of the present invention will be described in detail below.

FIG. 2 shows the configuration of one embodiment of the present invention.
Items with the same reference numerals as those in the figures indicate the same items. Here, the input setting switch section 3 includes switches i0 and 11.
The input setting switch section 3 can output four types of signals depending on the connection state of the switches 10 and 11. The first storage means 4 is composed of two D Frizzo Fronno circuits 12 and 13, and the oscillator 1
4(6) At the rising edge of the sampling pulse output from switch 10.11, the signal output from switch 10.11 is stored, and the stored signal is output until the rising edge of the next sampling pulse. First coincidence 1] The other means 5 is composed of an exclusive OR circuit 1st 16 and an OR circuit 17, and the two signals input to the exclusive OR circuit 15 match, and when the exclusive OR circuit 16 The output of the OR circuit 17 becomes Low only when the two input signals match. The counter 6 starts operating when the output of the first coincidence determination means 5 becomes Low, and counts at the falling edge of the sampling pulse output from the oscillator 14, and the value is set to a predetermined value (in terms of time, 4
0ms to 100ms), the output goes LOW.
It changes from to High.

Here, while the counter 6 is in operation, when the output of the first coincidence determining means 5 changes from Low to High, the count number is reset to O. The output signal of the counter 6 is input to the second storage means 7 via a selection circuit composed of an AND circuit 18, 19 and an OR circuit 20. 2
1 is a start switch that outputs a start signal instructing the start of a process operation, 22 is a frizzo-frozzo circuit that stores this start signal, and the selection circuit outputs the output signal of the counter 6 before the start signal is issued. However, after the start signal is output, a certain period of time after the output of the counter 6 changes from Low to High, an output signal of the timer 23 whose output changes from Low to High is output. The second storage means 7 is composed of two D-Frizzo flop circuits 24 and 25, and the D-Frizzo flop circuits 24 and 25 are connected to an OR circuit 2.
At the rising edge when the output of 0 goes from low to 1 (high), the first
The output signal of the storage means 4 is stored, and the stored signal is output to the electronic control section l. The electronic control unit 1 causes the display 26 . Controls the alarm 27 and the mechanical parts 28 such as Chiyu. The inhibit input storage means 8 is composed of flip-flop circuits 29 and 30, and outputs a predetermined input inhibit signal. The second coincidence determining means 9 is composed of exclusive OR circuits 31 and 32 and an OR circuit 33, and the signals input to the exclusive OR circuit 31 match, and the exclusive OR circuit 32 ORt! only when the two input signals match, that is, when the signal output from the input setting switch section 3 matches the input prohibition signal output from the prohibition input storage means 8). ! The output of circuit 33 is Lo
It becomes w. In this way, when the output of the OR circuit 33 becomes Low, the counter 6 is reset and its output becomes High.
It doesn't become h. Further, when the output of the OR circuit 33 becomes LOW, the electronic control unit 1 controls the display 26 and the alarm 27 to notify the user that there is a setting error.

Next, the operation of this embodiment configured as above will be explained. First, before setting up the program,
Output No. 16 (Low) of counter 6 is AND circuit 19
and the D free lag flop circuit 2 via the OR circuit 20.
It was man-powered on 4.25. (9) Then, when the user operates the input setting switch section 3, the connection state of the switches 10 and 11 changes in accordance with the operation, and finally a signal corresponding to the content desired by the user is generated. It is output from the input setting switch section 3. If the content set by the user is correct, the output of the second match determination means 9 is High, the signal output from the input setting switch section 3 is stored in the first storage means 4, and further , when the output of the counter 6 rises from Low to High, it is stored in the second storage means 7 and output to the electronic control section 1. In the above operation, when chattering occurs in the switches l (1, 11), the output of the first coincidence determination means 5 is unstable and the counter 6
Since the output does not become High, the signal output from the input setting switch unit 3 during this chattering will not be input to the second storage means 7. In addition, if the content set by the user is incorrect, the second match determination means 9
Since the output becomes LOW, the counter 6 does not operate and the second storage means 7 does not store the signal output from the input setting switch section 3 (10). Furthermore, in such a case, the electronic control unit 1 may be configured to display the display 26. The notification device 27 and the like are controlled to notify the user that the set contents are incorrect.

As explained above, according to the present invention, the signal output from the input setting switch when the user makes an incorrect setting, and the signal output when the input setting switch is repeatedly turned, can be prevented from being manually input to the electronic control section. This has the advantage that only correctly set signals can be input to the electronic control unit.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the basic configuration of the present invention, and FIG. 2 is a circuit diagram showing the configuration of an embodiment of the present invention. 1...Electronic control section, 2...Load section, 3...
・Manual setting switch section, 4...first storage means, 5.
... first match determining means, 6... counter, 7...
Second storage means, 8... Prohibition input storage means, 9...
Second match determining means. (11)

Claims (1)

[Claims] An input circuit for inputting a signal for modifying the program to an electronic control section that controls the load section according to a predetermined 10 grams, an input setting switch section for setting f, , i, etc. for modifying the program; , a first storage means for sampling and storing the output of the input setting switch section at regular time intervals, and determining whether the outputs of the first storage means and the A7J input setting switch section match. a first match determination means for determining the match I;
(j) a timer for counting in synchronization with the sampling operation of the first storage means during a period when another means outputs a coincidence signal; and a timer for counting in synchronization with the sampling operation of the first storage means; a second storage means for storing 6C of the output of the storage means and outputting it to the electronic control unit; a prohibition input storage means storing a predetermined manual prohibition signal; the prohibition input storage means and the first memory; and a second coincidence determining means for determining whether or not each output matches the output means and outputting a reset signal to the clocking means when they match, and outputting the input prohibition signal from the input setting switch section. 2. An input circuit characterized in that, when the input signal is input, the signal is not output from the second storage means to the electronic control section.