JPS5939613Y2 - Register setting error detection device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for detecting setting errors in registers used in fare scales, cash registers, and the like.

Generally, a shift register as shown in FIG. 1 is used as a tare register in a toll scale or the like.

When setting 123fI in this register 6, first press the button "1" on the keyboard 2, and the numerical value "l" is stored in the "l digit" 8 of the register 6 via the key encoder 4.

Next, press button ``2'' on keyboard 2, and the memorized value ``l'' will be displayed.
” is shifted to the “10s digit” 10, and the “1s digit” 8 is shifted to “
2" is stored.

Finally, press button ``3'' on keyboard 2, and the memorized value ``
"l" is shifted to the "100's digit" 12, the stored value "2" is shifted to the "10's digit" 10, and "3" is shifted to the "1's digit" 8.
is memorized.

When such a shift register 6 is used as a tare subtraction register of a charge scale whose minimum scale is 21, if it is known that the tare weight is always 3 digits, it will be 1231 as shown above.
If this is set, it is conceivable that the device determines that the stored value "3" of "1's digit" 8 is a setting error.

However, if the tare weight is not always known to be 3 digits,
There is a possibility that another number may be set after "3", and such a device has a problem in that it cannot determine "3" as a setting error.

The object of this invention is to provide a register setting error detection device that solves the above problems.

This invention will be explained below based on two embodiments shown in FIGS. 2 and 3.

FIG. 2 is a block diagram of the first embodiment, which is implemented in a tare subtraction register, and the same parts as in FIG. 1 are designated by the same reference numerals.

14 is an appropriate minimum digit value storage, which is the "1's digit" of register 6.
8 is stored.

A minimum digit value discriminator 16 compares the value stored in the "l digit" 8 of the register 6 with the value stored in the appropriate minimum digit value storage 14, and generates an error signal if they are different.

18 is a timer, which operates based on the output of the discriminator 16;
It emits an output when a set time elapses.

This timer 18 is provided with an erase terminal 19.
It is connected to the key encoder 4, and when the keyboard 2 is pressed, the timer 18 stops and returns to the initial state.

20 is a setting error indicator that displays a setting error based on the output of the timer.

Note that 22 is a display section that displays the contents of the register 6.

Next, the operation will be explained.

Now, assume that the interval between pressing one button on the keyboard 2 and pressing the next button is approximately 0.5 seconds, and the timer is set to 1 second.

In addition, the appropriate minimum digit storage unit 14 includes 0, 2, 4, 6, 8.
is stored, and the timer 18 is in an inactive state.

When push button “1” on keyboard 2 is pressed, “1” on register 6 is pressed.
"1" is stored in digit "8".

Then, the minimum digit value discriminator 16 issues an error signal and the timer 18 is activated.

After approximately 0.5 seconds have passed after push button "1" is pressed, push button "1" is pressed.
2" is pressed.

Then, the key encoder 4 sends an erase signal to the timer 18, and the timer 18 stops.

At the same time, the stored value rlJ of "l digit" 8 of register 6 is "
Shift to "10's digit" 10, "2" to "1's digit" 8
is memorized.

At this time, the minimum digit value discriminator 16 does not generate an error signal.

Next, about 0.5 seconds after pressing push button "2",
Push button "3" is pressed, the already stored values are shifted by one digit, "3" is stored in the "1's digit" 8, and the minimum digit value discriminator 16 issues an error signal.

However, the keyboard 2 is not operated after that.

Therefore, the timer 18 issues a setting error signal after one second,
The setting error indicator 20 lights up to indicate that there is a setting error.

FIG. 3 is a block diagram of the second embodiment, in which the same parts as in FIG. 2 are designated by the same reference numerals.

This embodiment is implemented in a tare weight setting section of a fare scale.

24 is a superposition detection unit, 26 is a calculation unit that performs tare subtraction calculation, etc.
28 is a net weight display section, 30 is a tare weight setting section, and the second
This corresponds to the keyboard 2 and key encoder 4 shown in the figure.

The operation will be omitted, but if there is a setting error, the net weight display may be erased if necessary.

Further, when the printer 82 is provided, it is necessary to stop printing if there is an error in tare subtraction settings.

In these setting error detection devices, when the interval between successive setting operations exceeds a predetermined time, it is assumed that the setting is completed, and it is detected whether or not there is a setting error in the minimum digit number.

Therefore, it is possible to prevent erroneous transactions from occurring.

Furthermore, in normal operation, the addition of this circuit does not affect equivalent operation.

In the above embodiment, this setting error detection device was implemented in the tare weight subtraction register, but it is not limited to the tare weight subtraction register, and may be any shift register whose value is finally stored in the lowest digit. .

Further, if there is an error in the settings, it is displayed on the setting error indicator, but it is also possible to have a configuration in which a warning is issued elsewhere.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a conventional tare subtraction register, Fig. 2 is a schematic diagram of a first embodiment of the register setting error detection device according to this invention, and Fig. 3 is a schematic diagram of the second embodiment of the same. FIG. 2... Keyboard register setting device, 4... Key encoder register setting device, 6... Shift register, 1
6...Minimum digit value discriminator, 18...Timer.

Claims (1)

[Scope of utility model registration request] There is a register in which the value to be finally stored in the lowest digit is determined in advance, a register setter that generates a register setting signal to set the value in this register, and a value other than the predetermined value in the register. It consists of a minimum digit value discriminator that generates an output when stored in the lowest digit, and a timer that starts based on the output of this discriminator, generates an output after a set time has elapsed, and stops based on the register setting signal. . A register setting error detection device, characterized in that the setting time of the timer is selected to be longer than the generation interval of the register setting signal.