JPH08115646A - Time switch - Google Patents

Abstract

PURPOSE: To enhance the efficiency of operations during a power failure by monitoring a current-carrying state by means of a power failure/power transmission detecting portion, causing a microcomputer portion to make judgment on the power failure detected and then turn off display elements in order to cause operation in a low- consumption operating mode, and causing the microcomputer portion to turn on the display elements at the restoration of power so that a program can be set. CONSTITUTION: A current-carrying state is monitored by a power failure/power transmission detecting portion 4 of a time switch 1, and if a power failure is detected a microcomputer portion 7 judges this and then turns off the display elements of a display/ setting control portion 5. Then a low-consumption operating mode is set in which stopping peripheral hardware, or changing the speed of an operating clock to a low speed, etc., are carried out. If a program-setting accepting switch 6 is turned on during the power failure, the microcomputer portion 7 judges this and then causes power to be fed to a backup power circuit 3 for a predetermined time to turn on the display elements of the display/setting control portion 5, thereby enabling a program to be set. When power is restored, the microcomputer portion 7 judges this via the detecting portion 4, then turns on the display elements of the control portion 5 to make possible program settings, and cancels the low-consumption mode to return to normal action.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a time switch capable of setting a program during a power failure by using a backup power source such as a power failure compensation battery.

[0002]

2. Description of the Related Art In a conventional time switch, although data is retained by a backup power source such as a power failure compensation battery during a power failure, the program cannot be set and must be set after power recovery. Therefore, the setting of the program usually has to be done at the site after the power is turned on and the power is turned on, and it is very troublesome to set the program at the site, and it may take time and effort to make the program setting. It was

In order to solve this problem, there is a time switch in which a backup power source such as a battery for power failure compensation is used to turn on the display element and set a program even during a power failure. With this time switch, it is possible to set the program in an office away from the work site, save the trouble of setting the program, and reduce the programming mistake drastically.

[0004]

However, the above-mentioned time switch, which can set the program even during a power failure, will be in the same state as a power failure when it is in stock after shipping, and the display element is lit up even during the inventory period so that the program Since the setting is enabled, the battery for power failure compensation used as a backup power source is exhausted, and the longer the inventory period, the shorter the power failure compensation time.

[0005]

In view of the above problems of the conventional time switch, the present invention is capable of setting a program at the time of power failure and, even when the inventory period is long and the power failure state continues for a long time, the power failure occurs. The purpose of the present invention is to provide a time switch that does not significantly reduce the power outage compensation time and does not significantly consume the backup power source such as the battery for compensation. In the case of a power failure, the power failure is detected and the display element is turned off.The display element is turned on by operating the low consumption operation mode without accepting the program setting, and turning on the program setting acceptance switch.
It is possible to set a program, detect the energization at the time of energization, turn on the display element, and set the program without interlocking with the program setting acceptance switch.

Further, in the time switch, the program setting acceptance switch can be turned on by a preset operation.

[0007]

In the time switch, the power failure / energization detecting section monitors the power-on state, and when a power failure is detected, the microcomputer section judges this and turns off the display element of the display and setting operation section. At this time, the peripheral hardware is stopped, the operation clock is changed to a low speed, and the low consumption operation mode is set. This low consumption operation mode continues until the program setting acceptance switch is turned on or the power is restored.

When the program setting acceptance switch is turned on in the power failure state, the microcomputer section judges this, for example, the time circuit operates, the power is supplied to the backup power supply circuit for a fixed time, and the display and setting operation section The display element is turned on, and the program can be set.

When the power is restored, the power failure / energization detection section determines this by the microcomputer section, lights the display element of the display and setting operation section, enables program setting, and releases the low-consumption operation mode to normal operation. Return to.

[0010]

1 and 2 show an embodiment of a time switch according to the present invention. The present invention will be described below with reference to these drawings.

As shown in the block diagram of FIG. 1, the time switch 1 includes a power supply circuit section 2, a backup power supply circuit section 3, a power failure / recovery detection section 4, and a display / setting operation section 5.
A program setting acceptance switch section 6, a microcomputer section 7 including a CPU, a ROM, a RAM and the like for controlling the entire device, and I
/ O section 8.

The operation of the time switch 1 is as shown in the flow chart of FIG. 2. The power failure / energization detecting section 4 monitors the power-on state. When a power failure is detected, the microcomputer section 7 judges this and displays it. And the display element (not shown) of the setting operation part 5 is turned off. At this time, the peripheral hardware is stopped, the operation clock is changed to a low speed, and the low consumption operation mode is set. This low consumption operation mode continues until the program setting acceptance switch is turned on or the power is restored.

Program setting acceptance switch 6 in the power failure state
When the power is turned on, the microcomputer unit 7 judges this, and the time circuit operates, for example, to supply power to the backup power supply circuit 3 for a certain time, turn on the display element of the display and setting operation unit 5, Can be set.

When power is restored, the power failure / energization detection section 4 judges this by the microcomputer section 7 and turns on the display element of the display and setting operation section 5 so that the program can be set and the low power consumption operation mode is released. Then, the normal operation is resumed.

The time limit circuit is used only as means for automatically shutting off the program setting acceptance switch 6, and can be appropriately changed within a range not departing from the gist of the present invention, such as manual turning on / off.

Further, the program setting acceptance switch 6 is
The program can be set by a preset operation, and the preset operation may be a method such as a hidden switch or a method of inputting a personal identification number to operate. However, it is also possible to adopt a system in which a plurality of switches are pressed at the same time, and it is possible to make appropriate changes within the scope not departing from the gist of the present invention.

[0017]

The time switch according to the present invention is a time switch in which a program can be set at the time of a power failure by a backup power source. In the time switch, a power failure is detected at the time of a power failure, the display element is turned off, and the low power consumption operation is not accepted. It operates in the mode, turns on the display element by turning on the program setting acceptance switch, enables the setting of the program, detects energization when energized to turn on the display element, and operates the program without interlocking with the program setting acceptance switch. By enabling the setting, it is possible to set the program in the event of a power failure, and it is possible to set the program in a non-powered state before installation at the site, and it is possible to improve work efficiency. Further, even if the stock period becomes long and the power failure state continues for a long time, the backup power source such as the power failure compensation battery is not significantly consumed, and the power failure compensation time is not shortened, which is economical.

In the time switch, the program setting acceptance switch can be turned on by a preset operation so that the backup power source such as the power failure compensation battery is not consumed by an erroneous operation and the power failure compensation time can be reduced. It has the effect of being economical without being shortened.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a time switch according to the present invention.

FIG. 2 is a flowchart of an embodiment of the time switch according to the present invention.

[Explanation of symbols]

1 ... Time switch, 2 ... Power supply circuit, 3 ...
-Backup power supply circuit section, 4 ... power failure / recovery detection section, 5 ... display and setting operation section, 6 ... program setting acceptance switch section, 7 ... microcomputer section, 8 ... I
/ O department.

Claims (2)

[Claims] 1. A time switch capable of setting a program at the time of power failure by a backup power source detects the power failure at the time of power failure, turns off the display element, operates in a low consumption operation mode without accepting the program setting, and accepts the program setting. When the switch is turned on, the display element is turned on to enable program setting. When power is turned on, the power is detected and the display element is turned on, and the program can be set without interlocking with the program setting acceptance switch. And time switch. 2. The time switch according to claim 1, wherein, in the time switch, the program setting acceptance switch can be turned on by a preset operation.