JPS59131121A - Electronic charge scale - Google Patents

Abstract

PURPOSE:To alter the contents of a memory externally and securely while holding a measurable state all the time by receiving metering data by an arithmetic circuit for a scale to which an AD converter is connected, perform arithmetic processing on the basis of the contents of the memory, and sending information from an arithmetic circuit for external equipment to the arithmetic circuit for the scale in the free time of the arithmetic circuit for the scale even during measurement. CONSTITUTION:The output of a metering part 5 is converted by the AD converter 6 into a digital signal, data is received by the arithmetic circuit 7 for the scale, and the contents of the memory 8 are also accessed and processed for finding a price, displaying the result. On the other hand, data of several sets of registers 2 and scales 3 are sent and returned through an in-line circuit 4, but data is sent out of a central controller 1 together with an equipment identification number for a change in unit price. An in-line controller 10 ignores data other than data on this machine by the equipment identification number and accepts the data on this machine following the equipment identification number, and it is stored in the arithmetic circuit 11 for external equipment. Thus, information on the in-line circuit 4 is monitored by the in-line controller 10 and arithmetic circuit 11 invariably.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to electronic price scales in which item-specific unit prices, tares, etc. are preset in a memory, and a large number of scales are connected and controlled in-line with a central control circuit.

Technical Background and Problems In general, major superstores have a central control unit (1) with a large number of registers (2) as shown in Figure 1.
and a large number of scales (3) are connected in-line (4) to create a system. The scale (3) incorporates a large number of scales and arithmetic processing circuits, and stores a large amount of data such as unit price and tare for each item. It is desirable that this storage be performed from the central control unit (1) using an in-line line in order to eliminate key operation errors by the operator. However, in the conventional scale (3),
The above-mentioned function is provided only when the key switch is set to the inline (4) mode, and it is necessary to perform human cycles for a large number of scales (3). It is difficult to perform this kind of thing on the scales (3) placed in various places, so when there is a daily unit price change or a unit price change in the middle of the day, the operator has to use the keys to weigh the scales (3). 3) The unit price must be changed every time, and there is a risk that the operation will take time and that an operational error may occur.

Purpose of the Invention The present invention captures necessary data from an external device even during measurement, making it possible to easily change the contents of the memory or store new data based on commands from the external device. The purpose of this invention is to obtain an electronic toll scale that does this.

Summary of the Invention The present invention provides an AD that converts the output of a measuring section into a digital signal.
A converter, a memory that stores a large amount of data such as the unit price of each item, and a calculation circuit for the scale connected to these are provided, as well as a calculation circuit for external equipment that constantly receives information from external equipment and stores what is necessary. A circuit was installed to send information from the external device calculation circuit to the scale calculation circuit during idle time when the scale calculation circuit was not exchanging data with the weighing section or memory. However, the contents of memory can be changed based on commands from outside, and this does not require any operator operation.
The processing speed is fast, there are no errors, and the structure is such that it can easily process a large number of machines.

Embodiments of the Invention First, a measuring section (5) that generates an electrical output corresponding to weight by a load cell is provided, and this measuring section (5) is equipped with an AD converter (6) that converts the output into a digital signal.
is connected, and the AD converter (6) of and is connected to the weighing arithmetic circuit (7). A memory (8) for storing a large amount of data such as unit price and tare for each item is connected to the scale calculation circuit (7), and a key and display circuit (9) is also connected thereto.

Next, an inline controller α1 is connected to an inline (4) to which a central control device (1) as an external device is connected, and an external device arithmetic circuit 0■ is connected to this inline controller 0I.

In such a configuration, the output of the measuring section (5) is converted into a digital signal by the AD converter (6), and specifically, the measuring data is outputted every 200 M5ec as shown in FIG. 3, for example. That is, the period is 200M5e
The time occupied by data in c is, for example, 5M5eC.

Such data is accepted by the scale calculation circuit (7),
The contents of the memory (8) are also recalled, necessary processing such as determining the price is performed, and the results are displayed.

On the other hand, data from several registers (2) and scales (3) is sent back and forth on the inline (4) line.
) data with a machine number attached is sent.

Based on this machine number, inline controller α1 ignores the data if it is not data for this machine, and if it is data for this machine, it receives the data following the machine number and stores it in arithmetic circuit 0 for external equipment. In this way, the information on the inline (4) is constantly monitored by the inline controller C1O and the arithmetic circuit 0η.

However, the effective time that the scale calculation circuit (7) receives and receives data from the weighing section (5) is extremely short.
1), there is a certain amount of free time. Therefore, during the idle time, the READY signal X is generated from the scale calculation circuit (7). When this signal If there is data (Zl), it is sent to the weighing arithmetic circuit (7).Then, the memory (8) is changed.

Effects of the Invention The present invention, as described above, accepts weighing data by a scale arithmetic circuit connected to an AD converter that converts the output of the weighing section into a digital signal, and performs arithmetic processing based on the contents stored in the memory. , 'The external device arithmetic circuit connected to the external device receives information from the external device even during weighing, and the information from the external device arithmetic circuit is sent to the weighing circuit during idle time. This makes it possible to reliably change the contents of the memory from the outside while always maintaining a ready state for weighing.Since the operator does not need to operate each scale individually, the processing time is extremely short. Moreover, there is no possibility of mistakes occurring.

[Brief explanation of drawings]

FIG. 1 is a layout diagram showing an inline system, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a timing chart. 1... Central control device (external device), 5... Measuring section,
6... AD converter, 7... Weighing arithmetic circuit, 8...
...Memory, 11...For arithmetic circuits for external equipment Applicant: Tokyo Electric Co., Ltd.

Claims (1)

[Claims] It has a built-in AD converter that converts the output of the weighing section into a digital signal, and also has a memory that stores a large amount of data such as unit price and tare weight for each item, and periodically receives data from the weighing section and uses it as needed. A scale arithmetic circuit that performs arithmetic processing is provided, and an external device that constantly receives information from external equipment and stores necessary information, and also sends out the information stored in the scale arithmetic circuit during idle time of the scale arithmetic circuit. An electronic fare scale characterized by being equipped with a device arithmetic circuit.