JPS61269442A - Switching device for data transmission loop - Google Patents

Abstract

PURPOSE:To make file enquiry even at the time of occurrence of abnormality by constituting the device of the first and second terminal groups, file controllers corresponding to the terminal groups and a switching device that outputs a switching signal at the time of abnormality of the controllers. CONSTITUTION:Two switching circuits 5 are connected between the first and second POS terminal groups and file controllers corresponding to the terminal groups. The switching device 14 of the circuit 5 has fixed contact points F1, F2, F3, and these contact points are connected to relays 10-13 as shown in the figure. When a trouble occurred in one file controller, a contact point K is connected to the contact point F2 by operating the switching device 14. Thereby, relays 11, 12, 13 operate and their contact points C1-C4 work. When the trouble occurred in another controller, the contact point K is connected to the contact point F3 similarly. Thereby, the contact, points C1-C4 of the relays 10, 11, 12 operate. Consequently, when the trouble occurred in one controller, both of terminal groups are connected to a normal controller, and accordingly, the fetching of the data can be continued.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to, for example, a plurality of POS terminals and their respective terminals.
The present invention relates to a switching device for a data transmission loop in a POS system or the like comprising a file controller that controls an OS terminal.

[Conventional technology]

For example, in a conventional POS system, a transmission line of one file controller is connected to a transmission loop connecting a plurality of POS terminals.

[Problem that the invention seeks to solve]

However, in such a system, if an abnormality such as a failure occurs in the file controller, there is a problem in that it becomes completely impossible to import data from each POS terminal and file inquiries cannot be made.

SUMMARY OF THE INVENTION In order to solve the above problems, it is an object of the present invention to provide a data transmission loop switching device that can reliably continue data acquisition and perform file inquiries even if an abnormality occurs in the file controller.

Another object of the present invention is to provide a data transmission loop switching device that can automatically switch the switching circuit when a file controller is abnormal, continue to take in data, and perform file inquiries.

(Means for Solving the Problems) The present invention corresponds to first and second terminal groups formed by connecting a plurality of terminals each inputting and processing data, and to these first and second terminal groups. first and second file controllers that are provided as a controller and output file data to each terminal and import data from each terminal;
and a switch that is operated when the second file controller is abnormal and outputs a switching signal according to the abnormal first and second file controllers, the first and second terminal groups, and the first and second file controllers. Normally, the cylinder 1 and the second terminal group are connected to the first and second file controllers in correspondence with each other, and when the first file controller is abnormal, the first file controller receives a switching signal and the first file controller is connected. A switching circuit comprising a plurality of relays that connects the terminal group to a second file controller and connects the second terminal group to the first file controller upon receiving a switching signal when the second file controller is abnormal. The aim is to achieve the above objectives.

Moreover, the present invention checks the data output from the first and second file controllers and
an abnormality detector that discriminates and detects an abnormality in the file controller; and a switch that receives an abnormality detection signal from the abnormality detector and outputs a switching signal corresponding to the abnormal first and second file controllers, The above object is achieved by activating the switching circuit when the file controller is abnormal.

[Effect]

By having the above configuration, the present invention allows each terminal group to be connected to a file controller in which no abnormality occurs and data is taken in by the switching operation of the switching circuit when the file controller is abnormal.

〔Example〕

A first embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a POS system that registers product sales data.

In FIG. 1, 1 is a plurality of POS terminals 1-1.
1-2. . . . 1-n is the first POS terminal group connected to the data transmission loop L1, and 2 is a plurality of POS terminals 2-1, 2-2, . . . 2-m is the second POS terminal group connected to the data transmission loop L2. Further, 3 is a first file controller, and 4 is a second file controller.

Each POS terminal 1-1~l-n and 2-1~2-
When inputting product sales data, m calls necessary file data from the file controller, performs registration processing of the product sales data based on the file data, and transmits the registered data to the file controller. The file controller 3.4 handles the POS that receives inquiries from each POS terminal for file coordination.
Output file data to the terminal and its POS
It has a function to import registration data from the terminal and file it in internal memory.

Now, the first and second POS terminal group 1,
2 and the first and second file controller 3.4, i.e. the data transmission loop L1 of the POS terminal.
．． L2 and the data transmission line L3 of each file controller 3, 4. A switching circuit 5 is connected between L4 and L4.

FIG. 2 is a configuration diagram of the switching circuit 5.

Txl, Tx2 are data input terminals connected to the data transmission line L3, and Rx1. Rx2 is a data output terminal connected to the data transmission line L3. Also, Tx
1- and Tx2- are data output terminals connected to the data transmission loop L1, and Rx1- and Rx2- are data input terminals connected to the data transmission loop L1.

On the other hand, Tx3. Tx4 is a data input terminal connected to the data transmission line L4, and Rx3°RX4 is a data output terminal connected to the data transmission line L4. Further, TX3- and TX4' are data output terminals connected to the data transmission loop L2, and Rx3' and RX4- are data input terminals connected to the data transmission loop L2.

As shown in FIG. 3, 10a, 11a, 12a, and 13a are relay contacts of a single sniper type relay (hereinafter abbreviated as relay) 10, 11, 12, and 13, respectively, and are movable contacts C1, C2, and C2, respectively. It has C3, C4 and fixed contacts NO, NO1, NO2, NO3, and NO4. Movable contacts C1 and C2 of the relay 10 are connected to data input terminals Tx1. Tx2 respectively, and movable contact C3
, C4 are connected to data output terminals Tx1+ and Tx2-, respectively. Movable contacts CI and C2 of the relay 11 are connected to data output terminals Rxl and Rx2, respectively, and movable contacts C3 and C4 are connected to data input terminals Rx1=, Rx2'
are connected to each.

On the other hand, the movable contact CL C2 of the relay 12 is connected to the data input terminal Tx3. Tx4 respectively, and movable contacts C3,
C4 is connected to data output terminals Tx3-1Tx4-, respectively. Movable contacts C1 and C2 of the relay 13 are connected to data output terminals Rx3°Rx4, respectively, and movable contacts C3 and C4 are connected to data input terminals RX3-1RX4=, respectively. And the fixed contact N of each relay
C is connected to its own fixed contact NC.

The fixed contacts NO1 of the relays 10 and 11 are commonly connected to the fixed contact NO3 of the relay 13, and the fixed contacts NO2 of the relays 10 and 11 are commonly connected to the fixed contact NO4 of the relay 13. Furthermore, the fixed contacts NOI of the relays 12 and 13 are commonly connected to the fixed contact NO3 of the relay 10, and the fixed contacts NO2 are commonly connected to the fixed contact NO4 of the relay 10. Fixed contact NO3 of relay 11 and fixed contact NO3 of relay 12 are connected, and fixed contact NO4 of relay 11 and fixed contact NO4 of relay 12 are connected.

By the way, each of the relays 10 to 13 is operated by a switching operation of a switching device 14. As shown in FIG. 3, this switch 14 has three fixed contacts F1, F2, and F3, to which relays 11 and 12 are connected via a diode D1, and a relay 13 is also connected. Relay 1 is connected to fixed contact F3 via diode D2.
1.12 is connected, and the relay 10 is also connected. Therefore, by switching to fixed contact F2, power is supplied to relays 11, 12, 13, and fixed contact F3
By switching to , power is supplied to relays 10, 11, and 12.

Note that under normal conditions, the switching contact K is connected to the fixed contact F1.

Next, the operation of the apparatus configured as above will be explained. Normally, the first and second file controllers 3
．． 4 is in a normal state, the switching contact of the switching device 14 is connected to the fixed contact F1. Therefore, the movable contacts C1 to C4 of each relay 10111.12.13 are connected to the fixed contact NG. In this way, the first file controller 3 and the first terminal group 1 are connected, and the first file controller 3 controls each POS terminal 1-1 to 1-n. The data is taken into the first file controller 3, and the second file controller 4 controls each POS terminal 2-1 to 2-m, and the data from each POS terminal 2-1 to 2-m is taken into the second file controller 3. is imported into the file controller 4.

In such a state, the second file controller 4
If the switch 14 is broken, the switch 14 is operated to connect the switching contact K to the fixed contact F2. As a result, relay 11.
Power is supplied to 121.13 and its movable contacts 01-C
4 is activated. In other words, each movable contact C1-C4 of each relay 11, 12, 13 switches and each fixed contact NO1-NO
Connected to 4. As a result, as shown in FIG. 4, the first and second terminal groups 1.2 are connected to the first file controller 3, and the second file controller 4 forms a self-loop. therefore,
POS terminals 1-1 to 1-n and 2-1 to 2-m
is controlled by the first file controller 3, and the data is taken into the first file controller 3.

In addition, if the first file controller 3 is out of order, operate the switch 14 to change the switching contact K to the fixed contact F3.
Connect to. This supplies power to relays 10.11.12 and activates its movable contacts 01-C4. That is, each movable contact 01-C4 of each relay 10.11.12 is switched and connected to each fixed contact NO1-NO4. As a result, as shown in FIG. 5, the first and second terminal groups 1.2 are connected to the second file controller 4, and the first file controller 3 forms a self-loop. Therefore, POS terminal 1
-1 to 1-n and 2-1 to 2-m are controlled by the second file controller 4, and the data thereof is taken into the second file controller 4.

In the first embodiment, relays 10 to 13
If either the first or second file controller 3.4 fails, both of the terminal groups 1.2 are connected to the normal file controller. Since the configuration is such that the data □ is connected, even if either the first or second file controller 3.4 fails, data can be continuously imported without interrupting the data import.

Next, a second embodiment will be described with reference to FIG.

Note that the same parts as in FIG. 1 are given the same reference numerals, and detailed explanation thereof will be omitted. This device is different from the first embodiment in that the switching operation of the switch 20 is automatically performed in response to an abnormality detection signal from an abnormality detector 21. This abnormality detector 21 checks (cuts off the output) the data output from the first and second file controllers 3.4, respectively.
4, and outputs the abnormality detection signal to the switching device 20. Note that the switching device 20 is configured such that its switching contacts are switched in response to an abnormality detection signal.

If the configuration is such that the abnormality detector 21 is provided, the first
] - When an abnormality occurs in the roller 3, the abnormality detector 21 detects the abnormality from the data output from the first file controller 1 to roller 3 and outputs an abnormality detection signal to that effect to the switch 20. do.

As a result, the switching contact of the switching device 20 is switched to the fixed contact F3, and the relays 10 and 1L12 operate. As a result, the connection state shown in FIG. 5 is achieved.

Further, when an abnormality occurs in the second file controller 4, the abnormality detector 21 detects the abnormality from the data output from the second file controller 4 and outputs an abnormality detection signal to that effect to the switch 20. As a result, the switch 2
Switching contact 0 switches to fixed contact F2 and relay 11
．． 12.13 works. As a result, the connection state shown in FIG. 4 is achieved. Therefore, data acquisition continues as in the first embodiment.

As described above, since the abnormality detector 21 is provided in the second embodiment, an abnormality in the first, second, and second file control rollers 3.4 is detected and the switching circuit 5 is automatically switched. data from each POS terminal can be continuously captured without interruption.

〔Effect of the invention〕

As detailed above, according to the present invention, the file controller l-
It is possible to provide a data transmission loop switching device that can reliably continue data capture and perform file inquiries even if an abnormality occurs in a roller.

Further, the present invention can provide a data transmission loop switching device that can automatically switch the switching circuit to continue data capture and file inquiries when the file controller is abnormal.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram when a data transmission loop switching device according to the present invention is applied to a POS system, FIG. 2 is a configuration diagram showing a first embodiment of the device according to the present invention, and FIG. 3 is a diagram showing the configuration of a first embodiment of the device according to the present invention. 4 and 5 are diagrams for explaining the switching action of the device of the present invention, and FIG. 6 is a diagram of the configuration of a second embodiment of the device of the present invention. 1-1~1- n-P OS terminal, 2-1~2-
m... POS terminal, 3... First file controller, 4... Second file controller, 5
...Switching circuit, 10.11.12.13...
・Relay, 10a, 11a, 12a, 13a・=One point J, 14.20...Switcher, 21...Abnormality detector. Applicant's agent Patent attorney Takehiko Suzue Figure 3 Figure 4 Figure 5

Claims (2)

[Claims] (1) First and second terminal groups each connected to a plurality of terminals that input and process data, and a terminal group that is provided corresponding to these first and second terminal groups to transfer file data to each terminal. The first terminal outputs and imports data from each terminal.
and a second file controller, a switch that is operated when the first and second file controllers are abnormal and outputs a switching signal according to the abnormal first and second file controllers, provided between two terminal groups and the first and second file controllers, typically connecting the first and second terminal groups and the first and second file controllers respectively, Connecting the first terminal group to the second file controller upon receiving the switching signal when the first file controller is abnormal, and connecting the first terminal group to the second file controller upon receiving the switching signal when the second file controller is abnormal. a switching circuit comprising a plurality of relays for connecting a terminal group to the first file controller. (2) First and second terminal groups each consisting of a plurality of connected terminals that input and process data, and a terminal group that is provided corresponding to these first and second terminal groups to transfer file data to each terminal. The first terminal outputs and imports data from each terminal.
and a second file controller; an anomaly detector that checks data output from the first and second file controllers to determine and detect an abnormality in the first and second file controllers; The abnormality detection signal is received from the first and second
a switch that outputs a switching signal according to the file controller; and a switch provided between the first and second terminal groups and the first and second file controllers; The groups are connected to the first and second file controllers in a corresponding manner, and the first terminal group is connected to the second file controller upon receiving the switching signal when the first file controller is abnormal. and a switching circuit composed of a plurality of relays that receives the switching signal and connects the second terminal group to the first file controller when the second file controller is abnormal. Data transmission loop switching device.