JPH06187573A - Commodity sales registration data processor - Google Patents

Abstract

PURPOSE:To quickly and accurately recognize the occurrence of abnormality in high-order equipment. CONSTITUTION:A high-order equipment switching circuit 20 is formed so as to automatically switch the high-order equipment 10M to another high-order equipment 10M when the abnormality occurs in certain high-order equipment 10M, and also, proper frequency signal outgoing means 15M, 15B which issue a frequency signal FB proper to its own machine to terminal machine 30MST, 30J-30H sides via transmission lines 13M, 13B are provided at the high-order equipment 10M, and also, a high-order equipment discrimination means 35 which discriminates from which high-order equipment 10M the proper frequency signal FM received via the data transmission lines 13M, 13B is transmitted is provided on at least one of the terminal machines 30MST, 30J-30H.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a merchandise sales registration data processing device in which a plurality of host devices can be switched and used.

[0002]

2. Description of the Related Art In FIG. 2, a commodity sales registration data processing apparatus comprises a plurality of host devices (for example, file controllers) 10M and 10B and a plurality of terminal machines 30M.
The STs, 30K to 30N are connected to each other by the data transmission lines 13M, 13B and 25 via the upper device switching circuit 20. In the case of the figure, the upper device 10M is a master device, the upper device 10B is a backup device, and both 10M and 10B are connected by a data backup line 14. This is because the data of both 10M and 10B are always the same.

On the other hand, each terminal unit (30) has a CP
It is made up of electronic cash registers including U, ROM, RAM, scanner, keyboard, display device, printer, drawer, etc., and performs predetermined processing for each mode such as "setting", "registration", "inspection", and "payment". Formed to do. In the case of FIG. 2, 30 MST is the master machine.

In the merchandise sales registration data processing device having such a configuration, the higher-level device 10M performs a response work to an inquiry from each terminal machine (30), a data collection work, and the like.
That is, if there is an inquiry about product data (product name, unit price, etc.) during registration work from the terminal machine (30 MST) connected by the data transmission lines 13M and 25,
The built-in product data file is searched and the product data is returned to the terminal machine (30 MST). The terminal machine (30 MST) that received this performs sales registration, calculation of total amount, display, receipt issuance and the like.

When an abnormality occurs in the master machine (10M), the upper device switching circuit 20 connects the data transmission lines 13B and 25 as shown in FIG. 3 and automatically switches to the backup machine (10B). Backup machine (10
Since the data of B) is always the same as the data of the master machine (10M), the work can be smoothly continued in each terminal machine (30).

[0006]

By the way, since each terminal machine (30) is mainly used for product sales, it is installed in a store and operated by a key input of a cashier. The devices 10M and 10B are formed from a host computer and are installed in a distant electric / mechanical room or the like for performing automatic work. Therefore, even if an abnormality occurs in the master machine (backup machine) and automatically switches to the backup machine (master machine), there will be no inconvenience to the product sales registration work in each terminal machine (30). However, since they are automatically switched too instantly and naturally, each cashier and the person in charge often do not notice at all. However, there is no guarantee that no abnormality will occur in the backup machine (10B). Thus, if an abnormality occurs in the backup machine (10B) after it has been automatically switched to the backup machine (10B) once, the master machine (10M) in which the abnormality has occurred has not been repaired. There is a problem that the data processing device cannot function as a whole.

An object of the present invention is to register a product for sale so that it is possible to easily determine whether or not automatic switching has occurred due to the occurrence of an abnormality in a host device on the side of the terminal device, and therefore, continuous and smooth overall operation can be performed. It is to provide a data processing device.

[0008]

A product sales registration data processing device according to the present invention is a product in which a plurality of host devices and a plurality of terminal devices are connected by a data transmission line via a host device switching circuit. In the sales registration data processing device,
The upper device switching circuit is formed so as to be automatically switchable from the higher device to another higher device when an abnormality occurs in the higher device, and a frequency signal unique to each higher device is transmitted to the higher device through the transmission line. An upper layer is provided which is provided with each natural frequency signal transmitting means for transmitting to the terminal side and determines from which higher level equipment the natural frequency signal received through the data transmission line to at least one terminal machine is transmitted. It is characterized in that a device discrimination means is provided.

[0009]

According to the present invention having the above-described structure, in a state where a certain higher-level device and each terminal are connected, the higher-level device discriminating means on the side of the terminal is transmitted from the natural frequency signal transmitting means of the higher-level device and transmits data. The host device can be known from the natural frequency signal received through the line. Even if an abnormality occurs in the higher-level device and the higher-level device is automatically switched to another higher-level device, the operating higher-level device after switching can be known. Therefore, the cashier or the like can accurately know that an abnormality has occurred in the master host device during normal work, and the repair can be immediately performed. Therefore, the entire device can be operated continuously and smoothly.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the product sales registration data processing device has the same basic configuration as that of the conventional example (FIGS. 2 and 3).
In addition, the higher frequency devices 10M and 10B are provided with the natural frequency signal transmitting means 15M and 15B, respectively, and the terminal devices 30 are provided.
The MST (, 30J to 30N) is provided with a host device discrimination means 35 so that the terminal device side can easily know the host device currently operating. The same parts as those of the conventional example (FIG. 2) are designated by the same reference numerals, and the description thereof will be simplified or omitted.

The upper device switching circuit 20 is the data transmission line 1
3M and 25 are connected, master machine (upper device) 10M
In a state in which the terminal device (30) and the terminal device (30) are connected, various data transmitted from the driver 11M of the master device 10M is received by the receiver 3 of each terminal device (30MST).
Received at 2. In addition, each terminal machine (30 MST)
The driver on the side and the receiver on the side of the master machine 10M are not shown. Also, a backup machine (upper device)
10B has the same configuration.

The master machine 10M and the backup machine 10B are connected by a data backup line 14 so that the data is the same as that of the other higher-level equipment 10B (10M) no matter which higher-level equipment 10M (10B) is operating. Has been formed. Further, when an abnormality occurs, the switching signal CHG is output, whereby the upper device switching circuit 20
Is configured to automatically switch to the higher-level device on the normal side.

Here, the master machine 10M includes an oscillator 1
A natural frequency signal transmitting means 15M including 6M and a pair of diodes 17M is provided. The transmitter 16M transmits the natural frequency signal Fm of its own device (10M). Therefore, while the master machine 10M is in operation, the natural frequency signal Fm can be transmitted to the terminal machine (30) side by adding it to the data from the driver 11M. The natural frequency signal transmitting means 15B on the one backup device 10B side has the same configuration (oscillator 16B, diode 17B), but the natural frequency signal is Fb (≠ Fm).

Next, the host device discriminating means 35 provided on the side of the terminal machine (30 MST) has the data transmission line 25.
In the case of this embodiment, it is a means for discriminating from which higher-level device the natural frequency signal received through the above is transmitted. In this embodiment, the filters 36b and Fm for the natural frequency signal Fb are used.
It comprises a filter 36m for use with a discriminating circuit 37, and a notification device 38 such as a display buzzer.

In the embodiment having such a configuration, the notifier 38 is
Considering a case where the master unit 10M is composed of a green lamp that lights up when the master unit 10M is operating and a red lamp that lights up when the backup unit 10B is operating, the master unit 10M has each terminal unit (30). In the case of being connected to, since the natural frequency signal Fm transmitted from the natural frequency signal transmitting means 15M is included in the data transmitted to the receiver 32, it is based on the signal Fm input through the filter 36m. The determination circuit 37 determines that the master machine 10M is operating. Therefore, since the green lamp is turned on, the cashier can know the fact accurately and easily.

When an abnormality occurs in the master unit 10M, the host device switching circuit 20 receiving the switching signal CHG,
The backup machine 10B is connected to each terminal machine (30). Since both upper devices 10M and 10B always have the same data via the data backup line 14,
Various operations at each terminal can be continuously performed without any problems. Moreover, since the green lamp is turned off and the red lamp is switched on, the cashier can know that an abnormality has occurred in the master machine 10M, so that appropriate processing such as inspection and repair can be quickly arranged.

According to this embodiment, however, the upper device switching circuit 20 is formed so as to be automatically switchable, and the natural frequency signal transmitting means 15M, 1 are provided to the respective upper devices 10M, 10B.
5B is provided, and each terminal machine is provided with host device discrimination means 35, so that at least one terminal machine (30M
In ST), the upper device (10B) currently in operation can be easily and accurately known, so appropriate processing such as inspection and repair can be performed quickly, and continuous and smooth operation can be performed as a whole. .

Further, each natural frequency signal transmitting means 15M,
Reference numeral 15B is for transmitting the frequency signals Fm and Fb, which are unique to the respective upper devices 10M and 10B and are different from each other, and the upper device determination means 35 on the side of the terminal machine (30MST).
Is formed by including the filters 36m and 36b for each frequency, so that it can be accurately determined regardless of the increase or decrease in the number of host devices.

Further, since the natural frequency signals Fm and Fb are transmitted together with normal data via the data transmission lines 13M, 13B and 25 which connect the host devices 10M and 10B to the respective terminal units, a dedicated line or the like is required. The cost burden is small because it does not.

[0020]

According to the present invention, the upper device switching circuit is automatically switchable, and each upper device is provided with each natural frequency signal transmitting means and each terminal device is provided with the upper device discriminating means. Since the configuration is such that one terminal machine can easily and accurately know the host device currently in operation, appropriate processing such as inspection and repair can be quickly performed, and continuous and smooth operation can be performed as a whole.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

FIG. 2 is a diagram for explaining a case where one upper device of a conventional example is in operation.

FIG. 3 is a diagram for explaining a case where the other upper device of the conventional example is in operation.

[Explanation of symbols]

 10M Upper device (master device) 10B Upper device (backup device) 11M, 11B Driver 13M, 13B Data transmission line 15M, 15B Natural frequency signal transmitting means 16M, 16B Transmitter 20 Upper device switching circuit 25 Data transmission line 30MST, 30J ~ 30N Terminal machine 32 Receiver 35 Upper device discriminating means 36m, 36b Filter 37 Discrimination circuit 38 Announcer Fm, Fb Natural frequency signal

Claims (1)

[Claims] 1. A commodity sales registration data processing device comprising a plurality of host devices and a plurality of terminal devices connected by a data transmission line via a host device switching circuit, wherein the host device switching circuit comprises a host device. When an abnormality occurs in the host device, it can be automatically switched from the host device to another host device, and each host device sends its own frequency signal to the terminal side through the transmission line. In addition to providing a signal transmitting means, at least one of the terminal devices is provided with a higher-level device determining means for determining from which higher-level device the natural frequency signal received through the data transmission line is transmitted. Product sales registration data processing device.