JPS5863819A - Working mode selecting method for electronic balance and electronic balance using said method - Google Patents

Abstract

PURPOSE:To improve operating performance by actuating an arithmetic device when an input device key is off, actuating a checking device when the key is turned off within a fixed period during the on period and actuating an abnormal short-circuiting device if the key is not turned off after passing a prescribed period. CONSTITUTION:An electronic balance is provided with an abnormal short-circuiting detecting device 4 to detect the abnormal short-circuit of a key in addition to an input device 1, an arithmetic unit 2 and a checking device 3, and a display device 5 displays the operated results of the devices 2-4, checked results and detected results. A key-on checking part 6 discriminates whether any one of keys on the device 1 is turned on or not before the connection of power device. When the key is not yet turned on, a command signal S1 is outputted to actuate the device 2, and a command signal S2 is outputted at the time of on state to actuate a time checking part 7. The checking part 7 is provided with a timer 71, which is actuated synchronously with the input of the signal S2. If a key under on state is turned off within a regulated time, a command signal S3 is outputted to actuate the device 3, and when said key is not returned to on, a command signal S4 is outputted to actuate the device 4.

Description

[Detailed Description of the Invention] The present invention relates to an electronic scale, particularly a method for selecting an operating mode of an electronic scale, which is equipped with a check device N and a key abnormality/shortness detection device fi&, and an electronic scale using the method. be.

'The electronic scale, as shown in Figure 1, has a weight sensor A that detects weight 111, and a tare (14
A calculation device consisting of a weight that subtracts the true weight of 11 (a weight that awards a mouse) (,, l: a calculation unit that calculates the price a by multiplying the true weight by the unit price and the unit price. f': 12+, unit price
A display device (b) that displays tare type, price, etc., and ljl
-1- arithmetic device (2) and display device 5) [ll
Value and 111J (Input device W
) and more. There is also a printing device i'?, which has a RAM for storing each data, a printing circuit, a printing drum, etc. The 1114 sensor A is equipped with an A-D converter.

Electronic scales equipped with many elements such as the device if listed above are checked in the factory to see if each chamber is working properly before shipping, and if there are complaints from users who have broken it. Similar checks are also carried out in order to detect failure points, and the details are as described below.

(1) Zero point adjustment Display the current output of the A-D converter and set its value to zero weight. (2) Key on check Check whether all keys are turned on normally.

In the case of a number key, press the key and see if the number appears on the display device (5). In the case of function keys, a specific number is assigned to each key in advance, and when the key is pressed, it is checked whether the scent appears on the display device tel or not.

(3) Segment Check All numbers from 0 to 9 are checked to see if there are any segment breaks on the display device.

(+lRAM check Check if there is an abnormality in RAM.

(5) Print drum check Check the print drum for missing characters.

(6) Print driver check Check for defects in the printing circuit.

(7) Display driver check Check for defects in the display circuit.

Conventionally, electronic balances were equipped with a special start switch and device to perform this check operation, and the operator installed his own RAM in a designated location and, for example, pressed the numeric key "1" to start the soil & , t1+, and by pressing the numeric key "2", it was possible to check item 1 (2). The above-mentioned start switch is installed inside the electronic scale, and due to circumstances such as the need to use a dedicated RAM, the user must create it independently.
It was not possible to memorize, and it was a troublesome task even for Amata D2.

In addition to the above problem, another major problem is the problem of abnormal key short circuits. For example, when a user removes the keyboard cover of the input device f+ to wipe it clean,
When the cover is reattached to the keyboard after the wiping operation is completed, the cover may be attached to the key hole with a groove of υh so that the key does not fit into the keyhole. In other words, the key is held down by the cover and the contacts are tied together, leaving the electronic scale in a state of limbo.If a cat-catching accident occurs, the electronic scale will no longer operate normally, and the user will not be able to use it. If you don't know the cause, it will always be a good or bad thing.

This invention was proposed in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide an electronic scale that allows users and dealers to easily perform checking operations at any time, and also allows for easy detection of abnormal short circuits. It is something to do.

The method and device of the present invention are provided with an abnormal short circuit device (4) for detecting an abnormal short circuit of the other keys of the input device 1), the arithmetic device position (2: (, check device (3)), and The main feature is that the operation mode of the other three devices M, 12, 13) t41 is determined depending on the state of the key of the input device fa (ll) within a certain period of time, and will be explained in detail below.

First, as shown in FIG. 2, the basic equipment is as follows:
l, abnormal short circuit detection device (4), and each device +21 (31
The electronic scale is equipped with a display device (5) that displays the calculation results, check results, and detection results of (41).The check device fgi, t31 checks the above +1) by pressing the numeric key "l" as described above. and press the number key "2" to check 01f (2), and then press the number key r3j
r4J...Check each "7" +31+4+
...(7) is made to correspond. The defective abnormal short circuit detection device (4) has a unique scent attached to each of the numeric keys and function keys, and when an abnormal short circuit occurs, the number is displayed as 1 (5) on the display device. ing.

This invention allows one of the three devices, ie, the demonstration device (2), the check device (3), and the abnormal short circuit detection device (4), to be created depending on the situation, and therefore, the above-mentioned basic In addition to the device, it is equipped with a software or hardware section that has the following functions.

A key ON confirmation unit (
6), (a) when none of the keys is turned on, outputs a command side 9 S + for operating the arithmetic device (2) to the arithmetic device (2); If any one of the keys is in the ON state, a command signal S2 is output to the time confirmation section (6) to operate the time confirmation section (7) described below. A timer (71) is provided to control the internal pressure of the time recognition section (7) and is operated simultaneously with the input of the command signal S2.

Next, ■(a) The key in the ON record is set to the above timer (71
) within the time [j (e.g. 15 seconds)
When the time check unit (7) outputs an operation command signal S8 to the check device (3), (b
) If the OFF state is not reached within the above time, the command signal S is used to activate the abnormal short circuit detection device f1t41.
Outputs 4.

Mode ■(a) above is intentionally created, and in order for the operator to perform inspections in the event of a failure, etc., one of the keys in the input device (1) must be in the ON state before the power switch is turned on. The check device (3) can be activated by setting the check condition to 1, and the actual check operation thereafter is as described above. Mode (1) indicates that an abnormal short circuit has occurred due to an accident, and the key corresponding to the number displayed on the display device (5) is causing the abnormal short circuit.

The above-mentioned key ON detection unit (6) and time confirmation unit (7) can be actually observed whether using software or hardware, and Fig. 3 shows an example in which hardware is used. show.

First, the key ON reactivation unit (6) uses a logic switching circuit that uses the key ON double number S6 as a control signal, and when the power is turned on, if the key 0N (i number S6) has already been output from the input device (1). command signal S2 from (62)
The command signal St is output from the key ON (when #WSa is not output, the game is turned off) (61).

The time confirmation section (7) is configured as follows. The output of trench and gate (62) is RS flip 70 knob (72
) is input to the set input terminal of the flip-flop (72), the output of the 7-gate gate (6B) of the logic switching circuit, and the reset output of the RS flip-flop (75) are input. The output of the gate (78) is input to the check device (3), and if the key is in the ON state before the power is turned on and the key is turned OFF after the power is turned on, the command signal SR is input to the check device (3). input and activates the check device (3). The output of the AND gate (62) is also input to the timer (71), and the output of the timer (71) and the key-on signal S6 are input to the AND gate (74), and the output is passed through the RS flip-flop (75). is input to the abnormal short circuit detection device (4), and the abnormal short circuit detection device (4) is activated unless the key that has been in the key ON state is turned OFF within the time specified by the timer (71). Flip 70 Tsuku (72) (7
The reset terminal (5) is connected to the clear key, and when the check sweep is completed or the abnormal short circuit is cured, the arithmetic unit (2) can be activated by pressing the clear key. There is. Shang and goo)
(76) is inserted to prevent devices (2) and (3) from operating at the same time when the key is turned off within the time specified by the timer (71).

With 'Il' configured in this way, unless any key of the input device (Rtl) is turned on intentionally or by accident, the scale will enter the normal mode, that is, the state in which the device (2) operates. However, if a check operation is required for pre-shipment inspection or post-shipment periodic inspection or for detecting faults at ≠, turn on any key at 11 after turning on the power. Turn on the power with the power on, and then turn off the key that is in the ON state to activate the check device (3). When the key is in the slot, the unique number assigned to the key will appear on the display when the key is inserted into the chamber.

The above is the performance device [2), the check device fq, t31,
Create an abnormal short circuit detection device (4)! This is a configuration for instructing luJ, and the actual operation value J is inputted to each device via the data bus b.

As explained above], this first scream activates either the demonstration device (2), the check device (3), or the abnormal short circuit detection device (4) depending on the state of the key of the input device f1+ when the power is turned on. Therefore, the checking operation is extremely simple and abnormal key short circuits can be easily detected.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an outline of an electronic scale, FIG. 2 is a block diagram showing the main components of this device, and FIG. 3 is an embodiment of the invention using hardware. In the figure, +1)...Input device N, (2)...Enactment device, (3)...Check device, (4)...Abnormal short circuit detection device, (5)...Display device , (6)...
Key ON contempt section, (7)...Time confirmation section.

Claims (1)

[Claims] ill An input device having a numeric keypad and various function keys, an arithmetic device that performs basic calculations as an electronic scale, and each element constituting the electronic scale are properly manufactured! An electronic balance includes a check device that checks whether or not the W button is pressed, an abnormal short circuit detection device that detects an abnormal short circuit of any one or more keys of the input device, and a display device that displays the calculation results, check results, and detection results. ■(a) Turn on the power 1 Immediately turn on any key on the input device.
If not, operate the arithmetic device; (b)
If any key is turned on, the mode will be set to the following ■. (a) If the key is turned off within a certain period of time, a check device group will be created, and (b) ) IW mode selection method for an electronic scale characterized by activating an abnormal short circuit detection device if the key does not turn OFF even after a certain period of time (2) Input having a numeric keypad and various function keys Abnormality in one or more keys of the device, the arithmetic unit that performs basic calculations as an electronic scale, the check device that checks whether each element that makes up the electronic scale operates properly, and the input device. It is equipped with an abnormal short circuit detection device r to detect short circuits, and a display device to display calculation results, check results, and detection results, and furthermore: (b) When one or more keys are turned on, a key-on confirmation section that operates the following time confirmation section; and (b) a time Blf drive unit that operates a check device if the key is turned OFF within the predetermined period of time, and (b) activates an abnormal short circuit detection device if the key is not turned OFF within the predetermined time. electronic scale.