JPH089767Y2 - Microcomputer controller - Google Patents

Description

[Detailed Description of the Invention] <Industrial application field> The present invention relates to a microcomputer controller that can be used to control various devices, and particularly displays a power failure to prevent erroneous control due to a power failure. The present invention relates to a microcomputer controller having a function to perform.

<Prior Art> FIGS. 3 and 4 show an example of a conventional one, showing a temperature controlling microcomputer controller mounted in an open showcase.

In the figure, reference numeral 1 is a temperature detector inside the refrigerator,
2 is a display for displaying the detected inside temperature, 3 is a setter including a DIP switch 3a and a digital switch 3b for giving a set value for controlling the inside temperature, and 4 is a setting set by the setter 3. By comparing the value with the internal temperature detected by the detector 1, the refrigerator, which is the controlled device, is controlled by the control relay 5
It is a microcomputer that controls the display value of the detector 1 on the display 2 while controlling it via
As shown in FIG. 4, the microcomputer 4 is initialized (10
1) and subsequently, the set value set by the digital switch 3b is read from the setter 3 (102). Next, the temperature inside the refrigerator is read from the temperature detector 1 (103), this is displayed on the display 2 (110), the temperature inside the refrigerator is compared with the set temperature (105), and when the temperature inside the refrigerator is high, Turn on control relay 5 (1
06) and turn off the control relay 5 when the temperature inside the refrigerator is low (1
07) Turn ON / OFF the refrigerator operation.

If you want to change the set value of the setter 3 during operation,
When the DIP switch 3a is turned on and the number of the digital switch 3b is changed, and then the DIP switch 3a is turned off, when the DIP switch 3a is turned off, the microcomputer 4 determines that it is a command to change the set value, A number is stored in the memory as a set value, and the set value can be changed. Therefore, unless the DIP switch 3a is turned on, the set value will not be changed even if the number of the digital switch 3b is moved by mistake.

<Problems to be solved by the invention> However, in the conventional microcomputer controller, if the digital switch is erroneously operated and a power failure occurs in this state and the power is restored, it will be operated with an incorrect set value. However, when I noticed it, there was a problem that the product was damaged.

The present invention has been made to solve such a problem, and an object thereof is to provide a microcomputer controller having a function capable of displaying a power failure.

<Means for Solving the Problems> In order to solve the above problems, the present invention compares the set value set by the setter with the detected value detected by the detector, and displays the detected value on the display. In addition, in the microcomputer controller for controlling the controlled device, when the power is applied, the display unit blinks, and after this blinking is released,
It is intended to control the operation of the controlled device based on the comparison, and the operation of releasing the blinking of the display device can be performed simultaneously or only after the setting of the setting value, the setting value of the setting device can be set. It is a feature.

<Operation> Since the present invention is configured as described above, after a power failure,
Since the display blinks when power is applied, including when power is restored, it is possible to confirm that a power failure has occurred. Also, the blinking operation of the display unit can be done at the same time as the setting of the set value or the setting of the set value.Therefore, even if a power failure occurs when the set value is moved by mistake, the new set value is set. The release operation will be performed later.

Therefore, the operation is not restored when the set value is incorrect.

<Embodiment> An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, 1 is a temperature detector, 2 is an indicator, and 3 is DI.
A setting device consisting of a P switch 3a and a digital switch 3b,
Reference numeral 4 is a microcomputer, 5 is a control relay, and the above is the same configuration as the conventional example shown in FIG.

In this example, when power is applied to the microcomputer 4, the display of the display 2 blinks and the DIP switch 3
The device 6 incorporates means 6 for canceling the blinking of the display device 2 by turning OFF, ON, and OFF in the same way as a normal setting operation.

When power is applied by the above configuration, the microcomputer controller is initialized (101) as shown in FIG. 2, and then the set value set by the digital switch 3b is read from the setter 3 (102). ), And stores it in the microcomputer 4. Next, the inside temperature is read from the temperature detector 1 (103), and the inside temperature is displayed on the display 2 while blinking (104) until the DIP switch 3a of the setting device 3 is operated as described later. The read inside temperature is compared with the set temperature (105), the control relay 5 is turned on (106) when the inside temperature is higher than the set temperature, and the control relay 5 is turned on when the inside temperature is lower than the set temperature. Turn OFF (107) to control ON / OFF of refrigerator operation.

For the blinking of the display unit 2, turn on / off the DIP switch 3a of the setting unit 3.
・ It is canceled by turning OFF (108), and at the same time, this
With the ON / OFF operation of the DIP switch 3a, the microcomputer 4 stores the current number of the digital switch 3b as a set value.

Here, even if the power supply is once shut down due to a power failure, the indicator 2 blinks as described above when the power is restored, so it can be confirmed that there is a power failure, and the set value can be set when canceling the blinking. Check, if the set value is correct, simply turn the DIP switch 3a OFF, ON, OFF, and if the set value is incorrect, set the number on the digital switch 3b correctly, then turn the DIP switch 3b OFF, ON, OFF Since the blinking of the display unit 2 can be canceled (109) by operating,
Prevents the operation from being reset with an incorrect set value and always enables normal cooling operation.

<Effect of Device> As described above, according to the present invention, it is possible to confirm that a power failure has occurred by blinking the display unit. Therefore, if the setter is accidentally moved, this set value can be confirmed. After making corrections, the blinking can be canceled. In other words, this blinking always calls for confirmation of the set value, so that damage to the product due to variation or error of the set value can be prevented.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is the same flowchart, FIG. 3 is a block diagram of a conventional one, and FIG. 4 is a conventional flowchart. In the figure, 1 is a temperature detector, 2 is a display, 3 is a setting device, 4 is a microcomputer, 5 is a control relay, and 6 is a display blinking canceling means.

Claims (1)

[Scope of utility model registration request] 1. A microcomputer controller for comparing a set value set by a setter with a detected value detected by a detector, displaying the detected value on a display, and controlling a controlled device. When the voltage is applied, the display is blinked, and after the blink is released, the operation of the controlled device is controlled based on the comparison, and the operation for releasing the blink of the display is to set the set value by the setter. A microcomputer controller, which can be performed simultaneously with or only after the setting of the set value.