JPH0136045B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weighing and processing device comprising an electronic scale and an electronic cash register (ECR).

In this type of weighing processing equipment, it is necessary to test whether the signal line connection between the scale and the cash register (ECR) is secure.
Conventionally, a weight circle with a fixed weight of 100g, 200g, 400g, 800g, etc. is weighed repeatedly on a scale, and the weight data at that time is transferred to the ECR and the contents of the scale's display and the ECR's display are displayed. The connection of the signal lines was confirmed by checking whether the contents of the two lines were the same.

However, with this type of weighing scale, several types of weights must be repeatedly weighed, which requires a relatively long time for testing and is complicated to operate.

The present invention has been made to eliminate these drawbacks, and it is an object of the present invention to provide a weighing processing device that can check the connection of the signal line between the scale and the ECR in a short time and with simple operation. purpose.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 shows the external appearance. 1 is an electronic scale, 2 is an electronic cash register (ECR), and these are placed on one end and the other end of a table 3, and are connected to electricity by a transmission cable 4. are connected to each other. The scale 1 is composed of a weighing platform 5, an operating section 6, and a weight display 7. The display 7 is mounted near the ECR 2 and connected to the weighing platform by a transmission cable 8. The ECR 2 has a customer remote display 9 on the top, a clerk display 10 on the top of the front, a keyboard 11, a journal inspection window 12, a receipt issuing port 13 on the center of the front, and a drawer on the bottom of the front. There are 14. The operating section 6 of the scale 1 is provided with a test key 6a which functions as a test operation start switch, for example, and the keyboard 11 of the ECR 2 includes a number key 11a for inputting unit price data, single item data, etc. A scale key 11b and the like used to retrieve weight data from the scale 1 are provided.

FIG. 2 is a block diagram showing the circuit configuration of the electronic scale 1. Reference numeral 21 is a weight sensor consisting of a load cell, etc. When a load is applied to the weighing platform 5, the weight sensor 21 generates a voltage corresponding to the weight. I am trying to output a signal. The voltage signal output from the weight sensor 21 is amplified by a differential amplifier 22,
Furthermore, high frequency components such as noise are cut out by a low-pass filter 23, and the A/D (analog/digital)
It is adapted to be input to a converter 24. The A/D converter 24 is of a double integration type, for example, and outputs a count number corresponding to the input voltage as a digital signal. Said A/D
The digital signal output from the converter 24 is
It is input to O port 25. The I/O port 25 is also equipped with various status switches 261, 262, 26n, etc., such as a switch for changing the weighing unit to pounds/kilograms, a switch for changing the maximum weight, an interface selection switch, etc.
The operation details are input as data. Weight count data and status switch operation information input to the I/O port 25 are supplied to a data processing device 27. The data processing device 27 is a CPU (central processing unit) 2
8. RAM (Random Access Memory) 29.
Consists of 30 ROM (read only memory),
These CPU28, RAM29, ROM30 and I/
O port 25 is data bus 31, address
They are electrically coupled by bus 32 . Further, the CPU 28, RAM 29, and ROM 30 are controlled by the display/keyboard controller 33 and the data bus 31 and the address bus 32, respectively.
It is electrically coupled to the ECR interface 34. The display/keyboard controller 3
3 controls the operation section 6 and the weight display 7, outputs key input from the operation section 6 to the data processing device 27, and outputs display data from the data processing device 27 to the display 7. I try to do that. The interface 34 is controlled by the CPU 28 and controls data transfer with the ECR 2. As shown in FIG. 3, the RAM 29 has, for example, 16×4 bits per word
It consists of 16 256 words and forms various registers and various flag memories. M[X,
Y], each bit is indicated by <>, and the main ones are described.The weight register is formed by 5 words M[O, 0] to M[O, 4], and the weight register is ,
16 words of F] form a working register,
M[5,0], M[5,1], M[5,2], M[5,
3], M[5, 4] each form a register for storing the contents of the various status switches 261, 262...26n, and M[7, 0] to M[7, 0] to M
Five words [7, 4] form an ADC register. Also, M [8, 0] ~ M [8, 5], M [9,
0]]~M[9,5], M[A,0]~M[A,5],
24 words M[B, 0] to M[B, 5] form a conversion register, and M[C, 0] to M[C, A], M
[D, O] ~ M [D, A], M [E, O] ~ M [E,
A], M[F, O] to M[F, A], 44 words, form a conversion calculation register. Also M [6,
0] <0> TEST1F (flag), M[6, 0] <1
> is formed as TEST2F (flag), M[6,1]<0> is formed as a weight over flag, and M[6,1]<1> is formed as a motion detection flag.

FIG. 4 is a block diagram showing the circuit configuration of the ECR 2, where 35 is a data processing device consisting of a CPU 36, RAM 37, and ROM 38, 39 is a scale interface for controlling data transfer with the scale 1, and 4
0 is a display/keyboard controller that controls the displays 9, 10 and the keyboard 11, and 41 is a printer controller that controls a printer 42 that issues receipts. The CPU 36 and
The RAM 37, ROM 38, scale interface 39, display/keyboard controller 40, and printer controller 41 are electrically coupled by a data bus 43 and an address bus 44. The CPU 36 reads a required program from the ROM 38 based on key input from the keyboard 11, and controls the RAM 37, the scale interface 39, the display/keyboard controller 40, and the printer controller 41.

Figure 5 is a circuit diagram specifically showing the interface between electronic scale 1 and ECR2.
The ECR interface 34 is provided with eight inverters 45-52, four 4-bit buffer registers 53-56, and a two-input NOR gate 57. A ready signal r is outputted from the output terminal ₀ of the data processing device 27 via the inverter 45, and a ready signal r is outputted from the output terminal ₁ of the data processing device 27 via the inverter 46.
The weight fluctuation signal s is outputted through the output terminal _2.
5 outputs weight data with each digit consisting of 4 bits to each buffer register 53 to 56, and output terminal ₆ outputs a clock pulse _c1 to each of the buffer registers 53 to 56 through a NOR gate 57. It is becoming more and more like this. Each of the buffer registers 53-56 _{sequentially shifts and stores data from the output terminals 2-5 in} synchronization with the clock pulse _c1 from the output terminal ₆ .
After the buffer registers 53 to 56 store the weight data, when a clock pulse c ₂ is inputted from the ECR 2 via the inverter 51 and the NOR gate 57, the data is transferred to the inverters 47 to 50 in synchronization with the clock pulse c ₂ . I am trying to output it via . In addition, the scale 1 is
The enable signal e is sent from ECR2 to the inverter 52.
The signal is inputted to the input terminal I0 of the data processing device 27 via the input terminal _I0 of the data processing device 27. The interface circuit 39 of the ECR 2 is provided with eight inverters 58 to 65 and an I/O port 66, and the I/O port 66 is connected to the data processing device 35 and the data bus 43.
Data is exchanged via the address bus 44. The ready signal r from the scale 1 is inputted to the input terminal _I0 of the I/O port 66 via the inverter 58, and the weight fluctuation signal s from the scale ₁ is inputted to the input terminal I1 via the inverter 59. The weight data from the scale 1 is input to the input terminals I ₂ to I ₅ , respectively, to the inverters 60 to 60 for each bit.
63. Further, the above-mentioned clock pulse _c2 is output from the output terminal ₀ of the I/O port 66 to the scale 1 via the inverter 64, and the above-mentioned enable signal e is output from the output terminal ₁ to the scale 1 via the inverter 65. I try to do that.

FIG. 6 is a flowchart showing the control carried out by the CPU 28 of the scale 1, which performs initial processing when started by turning on the power. This initial processing
Clear RAM29, various status switches 2
61, 262, . . . 26n are read and processed. Subsequent segment scanning is performed. This is checked by sequentially lighting up each digit from 0 to 9 to see if the segments of each digit of the weight display 7 are lit normally. Next, key processing is performed. Here, when a key operation is performed on the keyboard 6, a process corresponding to the key input is performed and count number data inputted from the ADC, that is, the A/D converter 24, is read into the ADC register. Now, we digitally process the count data read in to remove flickering.
Then, if test 1F or 2F is set, the program branches to the test routine. In this case, when the zero point changes within a certain range, the changed point is automatically corrected to a new zero point. For example, if Kg settings have been made, the read data is multiplied by the Kg coefficient and the Kg
Convert. Then, subtract the tare weight from the read weight data to calculate the net weight. Then, if there is a change in the displayed weight, the motion detection flag is set to "1". Now round the weight data to the smallest scale unit. Then, display data is determined while checking the motion detection flag, overweight flag, etc., and is displayed on the weight display 7. Here is the weight transfer command from ECR2.
If the weight is stable when the ENABLE signal e is input, the weight data is transferred to the ECR for processing.
When this transfer processing is completed, the routine returns to key processing again.

FIG. 7 shows the test key 6a in key processing.
This shows a flowchart when the test key 6a is operated, and when the test key 6a is operated, the status of TEST1F and TEST2F is checked. Both TEST1F and 2F are “0”
When , TEST1F is set to "1". Further, when TEST1F=1, TEST1F is reset and TEST2F is set to "1". Also
When TEST2F=1, TEST2F is reset.

FIG. 8 shows the control of the test program branch processing. Here, when the key processing shown in FIG. 7 is performed, the status of TEST2F and 1F is checked.
If TEST2F=1, the contents of each content storage register in which the contents of the various status switches 261, 262, . . . 26n are written are evaluated on the weight display 7. After that, A/D converter ADC
Data is read from 24, flicker prevention processing is performed at , and the process returns to key processing. Also
If TEST1F=1, A/D converter ADC2
The data is read from step 4, flicker prevention processing is performed at step 4, and the read count number is displayed at step 4. When this display processing is completed, it is checked whether the ENABLE signal e is received from the ECR2, and if there is no ENABLE signal e, the process returns to the key processing, but if there is an ENABLE signal e, then it is checked.
Move to ECR test routine ETR. This ECR
In the test routine ETR, the ECR interface 34 is activated and the weight fluctuation signal s is sent to the ECR.
2 to confirm that there was a weight change on scale 1.
Notify ECR. The preset weight data of 01248 g is stored in the weight register and displayed on the weight display 7. 〓〓 Contents displayed in weight,
In other words, transfer the content "01248" of the weight register to the ECR transfer register (not shown), change the weight fluctuation signal s from "H" to "L", and then transfer READY to ECR2.
Outputs signal r. In this way, the ECR 2 immediately reads the data in the transfer register and displays it on its own display devices 9 and 10. Now, hold the weight fluctuation s at "L" for 0.8 seconds. This allows ECR
2 will hold the data display for 0.8 seconds while outputting the ENABLE signal e. and again
Check the presence or absence of the ENABLE signal e, and if it is not present, return to key processing. Also, if there is an ENABLE signal e, clear the working register with 〓〓, display the contents of the working register on the weight display 7 with 〓〓,
Furthermore, at 〓〓, data transfer processing to the ECR2 is performed in the same way as 〓〓 above. Furthermore, the weight fluctuation signal s is outputted as in 〓〓, and the 0.8 second delay processing after the weight fluctuation signal s is output is performed as in 〓〓. Then, ``11111'' is added to the working register at 〓〓, and the weight over flag is checked to see if there is an overflow. In other words, the display starts from “00000”, then “11111”, “22222”… and “99999”.
Check whether it has been completed. And from ECR2 when there is no overflow
If there is an ENABLE signal e, the routine returns to the display of 〓〓 and is repeated. From the ECR2 to the scale 1
The output of the ENNABLE signal e is started when the scale key 11b on the keyboard 11 is operated.

Figure 9 shows weight fluctuation signal s, ENAABLE signal e,
This is a timing diagram showing the output timing of the ready signal r, clock pulse _c2 , and weight data, in which the ready signal r is output from the scale 1 to the ECR 2 at the timing when the weight fluctuation signal s changes from "H" to "L".
At this time, if the enable signal e is output from the ECR 2 to the scale 1, the ECR 2 immediately outputs a clock pulse _c2 to the scale 1 to read the weight data. Once the weight data has been read,
The ECR 2 stops outputting the enable signal e, and by stopping the output of the enable signal e, the balance 1 stops outputting the ready signal r. Also, when the weight fluctuation signal s is output from the scale 1 again, the ECR2
Now, scale key processing is performed again, and enable signal e is output to scale 1.

In this way, in the apparatus according to the embodiment of the present invention, various status switches 261, 262, . . . are displayed on the weight display 7 by operating the test key 6a on the scale 1.
...26n operation details display and A/D converter 24
It is possible to switch the display of the count read in from. Then, when the count number of the A/D converter output is displayed on the weight display 7, the ECR2
When the scale key 11b is operated, the scale changes to scale 1.
When the ENABLE signal e is input, the scale 1 first displays the preset check weight data "01234" on the weight display 7, and then sends this weight data to the ECR 2 via the ECR interface 34.
Transfer to. In this case, by setting the weight data to "01234", all four data lines will be used. In the ECR 2, the weight data input via the scale interface 39 is displayed on the displays 9 and 10. In this way, by visually confirming that the weight data displayed on the scale 1 and the weight data displayed on the ECR 2 are the same, it is possible to easily check whether the transmission line 4 is normal or not. Also, scale 1 has weight data “01234”.
When the transfer process to ECR2 is completed, the weight data of “00000” is set and the weight display 7 is set.
It is displayed and transferred to ECR2. After that, the scale 1 reads “11111”, “22222”, etc. at intervals of 0.8 seconds.
. . . The weight data up to “99999” is set in sequence and transferred to the ECR2. The ECR 2 sequentially displays each input data on the display devices 9 and 10. In this way, it is possible to check the segment lighting of the indicators 9 and 10 of the ECR2.

In this way, you can easily check whether the signal line connecting the scale 1 and the ECR 2 is normal by simply operating the test key 6a on the scale 1 and the scale key 11b on the ECR 2. can do. Moreover, since weight data is generated internally and transferred to the ECR, confirmation work can be done in a short time.

As detailed above, according to the present invention, an electronic scale and an electronic cash register are connected by a signal line, and weight data is transferred from the scale to the cash register via the signal line. In the weighing processing device, the electronic scale sequentially displays preset signal line check data on its own display when a test operation is started and there is a data transfer request from the cash register at that time. The input data is transferred to the above cash register, and the above cash register displays the input data on its own display, so the connection status of the signal line can be easily confirmed with a simple operation. It is possible to provide a weighing processing device that can perform confirmation work in a short time.

[Brief explanation of drawings]

The figures show an embodiment of the present invention; Fig. 1 is an external view, Fig. 2 is a block diagram of the scale, and Fig. 3 is a scale diagram.
RAM memory configuration diagram, Figure 4 is a block diagram of the cache register, Figure 5 is a circuit diagram of the interface, Figure 6 is a flowchart showing the main control of the scale, Figure 7 is a flag triggered by operation of the scale's test key. FIG. 8 is a flowchart showing the test program branching process of the scale, and FIG. 9 is a timing diagram showing the output timing of various signals during data transfer control between the scale and the cash register. 1...Electronic scale, 2...Electronic cash register ECR, 4...Transmission cable, 6a...Test key, 7...Weight display, 9, 10...Display device,
11b... Scale key, 21... Weight sensor,
24...A/D converter, 28...CPU (central processing unit), 34...ECR interface,
36...CPU (central processing unit), 39...Weighing interface.

Claims (1)

[Claims] 1 A signal line connects the electronic scale that weighs and displays the object to be weighed and the electronic cash register that performs arithmetic processing on input data, registers it in internal memory, and displays it. In the weighing processing device, the electronic scale has a test operation start switch and a test operation start switch. Means is provided for sequentially displaying preset signal line check data on its own display and transferring it to the cash register when a data loading operation is performed in the cash register when the start switch is operated. A weighing processing device characterized by the following.