JPS594060B2 - Power restoration processing method for data aggregation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power restoration processing method in a data aggregation system, and more particularly to a power restoration processing method in which a storage device on the center side is provided with a management table for grasping the status of terminal devices.

In a data aggregation system in which a center consisting of a central processing unit and a terminal control device controls multiple terminal devices via a communication line, a non-volatile storage unit records information regarding control procedures in preparation for a power outage of the terminal devices. If this is provided in each terminal device, the system can be operated smoothly.

However, in this method, the terminal devices are expensive, and in a system where a large number of terminal devices are installed, it is desirable to reduce the price of the terminal devices as much as possible. The configuration of a conventional data aggregation system will be explained using a diagram.

FIG. 1 is a block diagram illustrating the configuration of a conventional data aggregation system, in which 1 is a center, 2 is a central processing unit, 3 is a storage device, 4 is a terminal control device, 5 is a communication line, 6 is a terminal device, and T is the storage section. In FIG. 1, a plurality of terminal devices 6 are connected via a line 5 to a center 1 consisting of a central processing unit 2, a storage device 3, and a terminal control device 4. A storage section T is provided in case of a power outage of the terminal device. The terminal devices 6 individually transmit data to the center 1, and the center 1 checks whether this data is correct. For example, in a voting ticket sales aggregation system, the center 1 checks voting data (group number, number of votes) from the terminal device 6 to see if it is the correct group number. Based on the check result of the center 1, an approval signal is sent to the terminal device 6, and the terminal device 6 thereby performs operations based on the data, such as printing voting data and issuing tickets. In such a system, it is economical to adopt a system configuration in which the storage unit 7 is not provided in the terminal device 6. However, such a system has the disadvantage that when the power of the terminal device is cut off, the data transmitted by the terminal device is not retained, resulting in insufficient processing. For this reason, conventionally, when a terminal device loses power and then returns to power, the terminal device issues a power recovery signal, and the center side that receives this power recovery signal transmits the transmitted data that has already been received from the terminal device. A method is adopted in which the data is sent back to the terminal. This returned data is unnecessary when the terminal device has completed processing (for example, has issued a ticket), and will confuse the operator of the terminal device. An object of the present invention is to provide a power recovery processing method in the above-mentioned system that allows data to be sent back from the center side only when necessary when the power of the terminal device is restored.

The present invention connects a plurality of terminal devices to a data aggregation device including a central processing unit, the data aggregation device inspects and aggregates data transmitted from the terminal devices, and transmits an authorization signal from the data aggregation device. In a data aggregation system operated by a terminal device, the data aggregation device includes:
A management table is provided to record the status of each terminal device, and when a power restoration signal is received from the terminal device, the management table is used to control data sent back to the terminal side.

The present invention will be explained below with reference to the drawings.

FIG. 2 is a plotter diagram explaining the system configuration of the embodiment of the present invention, in which 1 is a system, 2 is a central processing unit, 3 is a storage device, 4 is a terminal control device, 5 is a communication line, and 6 is a terminal device. , 8 is a management table, and R is a power recovery signal. 1st
The difference in the system configuration between this figure and FIG. 2 is that in FIG. This management table 8 is a table having a number unique to each terminal device and a corresponding 1-bit storage column. Second
In the figure, when the center 1 receives an interrupt requesting processing from the terminal device 6 (for example, machine No. 1), the central processing unit 2 accesses the storage device 3 and writes "1" in the record column of machine No. 1 of the management table 8. When this terminal device (unit No. 1) experiences a power outage accident, and then the power is restored and a power restoration signal R is issued, the center 1 that receives the power restoration signal R writes the management table 8. Only when the record field of No. 1 machine is "l", the latest data received from the first machine is returned, and conversely, when it is "0", no data is sent back. Hereinafter, the system according to the present invention will be explained using examples.

The embodiment is a voting ticket sales aggregation system using a polling method. In this system, when a terminal device receives an ENQ signal from the center side, it sends data such as the type and number of voting tickets to the center side. The center side accepts this interrupt, writes [1] in the record column of the management table, and sends an authorization (0K) signal to the terminal side. The terminal device sells voting tickets based on this 0K signal. The center side records the data (type and number of voting tickets) that accepted the interruption, and updates the contents each time an interruption occurs. The details of the method according to the present invention will be explained using time charts.

Figure 3 is a time chart illustrating the exchange of signals between the center side and the terminal side, Figure 3a is an example of a power outage during ticket issuing operation, and Figure 3b is a time chart showing the power failure during order receiving operation. This is an example of a disconnection. In Figure 3, A is the first processing cycle, B is the second processing cycle, C is the ACK signal, D is the data signal, E is the ENQ signal, K is the 0K signal, R is the recovery signal, and a is the data. It is. Operations performed on the terminal device include an order receiving operation for receiving an order from a customer, and a ticket issuing operation for printing a voting ticket. In FIG. 3a, the terminal side starts an order acceptance operation at time T, and upon receiving the ENQ signal E from the center side at time T2, sends out data a along with data signal D.

The contents of data a are the type and number of voting tickets. The center side receives the data a, writes 1 in the record field, and then transmits an 0K signal K to the terminal side. This 0K signal K
The terminal side that received this starts the printer from time T3,
Performs ticket issuing operation. During this operation, the power is cut off and the work is interrupted. After that, the power is restored at time T4, and E
When the terminal side receives the NQ signal E, it transmits a recovery signal R to the center side. Upon receiving this restoration signal R, the center side immediately issues a data signal D and sends data a back to the terminal side.

The data a received on the terminal side has the same content as the data a previously sent to the center side at time T2. If a ticket has not been issued from the ticket issuing gate, the operator checks the contents of this data a, inputs this data and a subtraction command to subtract the already updated file, and sends it to the center 1. On the terminal side, when receiving the ENQ signal E at time T3, ACK is sent.
When the signal C is transmitted and the center side receives the ACK signal C, the first processing cycle A is completed. Figure 3b is
This is an example in which a power outage occurs during an order receiving operation in the second processing cycle B. In FIG. 3b, the first processing cycle A is a normal cycle, and the second processing cycle B is one in which an order acceptance operation is performed from time T7, and in the process, the power to the terminal device is cut off. In the second processing cycle B, when the terminal device's power is restored at time T8 and receives the ENQ signal from the center, it transmits the power recovery signal R to the center side. On the center side, when receiving the restoration signal R from the terminal side, the record field corresponding to that terminal device is "o", so data a is not returned to the terminal side.

Therefore, the terminal side does not have to worry about sending back unnecessary data, and the operator does not have to worry about confusion in his work. As a modification of the above embodiment, when the center 1 receives the power restoration signal, it detects whether or not the file of the center 1 has been updated, and if it has been updated, it sends a subtraction input command to the terminal side in addition to the data a mentioned above. You can also send it back. Furthermore, the management table can be changed to the terminal FbI.
It may be provided in the leg device, or if the terminal control devices are duplicated as a countermeasure against failures, an external memory that can be accessed by both terminal control devices may be used as the management table. In this way, the present invention prevents operational errors on the terminal device operator when power is restored and reduces the burden by providing the management table 8 in the storage device 3 of the center 1 to grasp the status of the terminal device 6. It is possible.

[Brief explanation of the drawing]

Figure 1 is a block diagram for explaining the conventional system, Figure 2 is a block diagram for explaining the embodiment of the present invention, and Figure 3 is a time chart for explaining the system of the present invention. The codes are as follows. 1... Center, 2... Central processing unit,
3...Storage device, 4...Terminal control device, 5.゛゜・゛Communication line, 6...Terminal device, 7
...Storage section, A...1...first processing cycle, B...second processing cycle, C...
・ACK signal, D... Data signal, E...
...ENQ signal, K...0K signal, R...
...Return signal, a...Data, t1~T,...
····time.

Claims (1)

[Claims] 1 A plurality of terminal devices are connected to a data aggregation device including a central processing unit, the data aggregation device inspects transmitted data as a processing request from the terminal device, and transmits an authorization signal to the terminal device based on the inspection result. In the data aggregation system, the data aggregation device causes the terminal device to perform an operation based on the transmitted data, and the data aggregation device aggregates the transmitted data, wherein the data aggregation device stores a state of the terminal device corresponding to the terminal device. a management table that sets the corresponding area of the management table in accordance with a processing request from the terminal device, and receives data from the terminal device in response to a power recovery signal from the terminal device and in accordance with the storage state of the management table. A power recovery processing method for a data aggregation system, characterized in that transmitted data is returned to the terminal device.