JPS6035857A - Transferring and processing system of table information - Google Patents

Abstract

PURPOSE:To change the contents of two tables securely by allowing one station to change the contents of the 1st table on the basis of a table content changing information from the other of fice to compare the changed contents with the contents of the 2nd table and send and process the dissident information to the other office. CONSTITUTION:When the coincident contents of two tables TB1, TB2 in an office A are to be changed by a command from an office B, changing table information is generated from the office B, so that the office A starts a confirming timer TIM and changes the contents of the TB1 by a write control circuit WC. Subsequently, the office A reads out and compares the contents of the TB1 and TB2 through a read control circuit RC and sends the inconsistent information of the compared result to the office B. After confirming the dissident information, the office B sends a table switching command to the office A. Receiving the command, the office A transfers the contents of the TB1 to the TB2 under the control of the circuits RC and WC, changes the contents of the TB1 to the TB2 under the control of the circuits RC and WC, changes the contents of the TB2 in the same manner as that of the TB1 and then sends table switching completion information to the office B. When the dissident information from the office A does not correspond to the table to be changed, the office B leaves the information as it is and the office A returns the contents of the TB1 to an original state at a timeout.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a table information changing process in which stations each having a double memory format table are connected by a line or a channel, and one station changes the table contents of the other station. It is related to the method.

Conventional technology and problems It has multiple stations that are equipped with a double memory format table, check whether the contents are the same, and control terminal equipment and data transmission, and the stations are connected by lines or channels. In such a system, it may be necessary to change the table contents from one station to another. For example, as shown in FIG. 1, a master station CT and a plurality of slave stations RTI to RTn are connected by a line, and (2) between the master station CT and each slave station RTI to RTn, the first and second Tables TBI and TB2 are provided,
A system is known in which reliability is improved by controlling the terminal device TE and data transmission by checking that the contents of the tables are the same. Examples of such systems include power transmission and distribution control systems.
The terminal bag wTE will be handled by substations and switching stations.

When the type of terminal device is changed or the number of terminal devices is increased,
It is necessary to change the contents of tables TBI and TB2.

As the contents of the tables TBI and TB2 of the parent and child stations are changed, the contents of the table of the master station CT must also be changed, so information on changing the table contents is transferred.

However, since it does not have a single table configuration but has duplicated tables TBI and TB2, it was not possible to confirm changes in table contents. Therefore,
Since each station performs processing to change the contents of tables TBI and TB2 based on the transferred information, the processing becomes complicated and the processing time becomes long.

(3) Purpose of the Invention The object of the present invention is to change table contents from one station to another station reliably and in a short time.

Composition of the Invention The present invention transmits change table information for changing table contents from one station to another station, and the other station changes and confirms the contents of the first table based on the change table information. activating a timer, then comparing the first and second table contents and sending mismatch information to the one station, where the mismatch information corresponds to the change table information; When this is confirmed, a table switching command is sent to the other station, and the other station uses the table switching command to change the contents of the second table with the contents of the first table so that they match. After that, the one station is notified of table switching completion, and when it is confirmed that the mismatch information does not correspond to the change table information, the one station is left as is, and the other station (4) The content of the first table is changed by the content of the second table when a confirmation timer times out, so that the content of the first table is made to match the previous content. , Examples will be described in detail below.

Embodiment of the invention FIG. 2 is a block diagram of main parts of an embodiment of the invention,
TBI and TB2 are first and second tables, WC is a write control circuit, RC is a continuation control circuit, and TIM is a confirmation timer. The contents of the first and second tables TBI and TB2 are read out by the continuation control circuit RC and compared and verified, and processing is executed based on the information of the comparison match.

FIGS. 3 and 4 show sequence charts of an embodiment of the present invention, and are for the case where table contents from station B (B) to station A (A) are changed. Initially, the first and second tables TBI, TB of A station (A)
The contents of 2 match as shown by "=". In station B (CB), create the table change details and send it to station A (CB).
) to send change table information. This change table information (5) information includes, for example, control information 1 indicating a change in table contents, table address information 2, and change content information 3.

When the A station (A) receives this change table information, it starts the confirmation timer TIM and changes the contents of the first table TBI by the write control circuit WC. Figures 3 and 4
In the figure, diagonal lines indicate that the contents have been changed.

Next, the contents of the first and second tables TBI and TB2 are read out by the successive control circuit RC and compared and verified. In that case, only the contents of the first table TBI are changed, so
There is a mismatch, and the mismatch information is sent to station B (B). This mismatch information can be composed of, for example, control information 4 indicating return information, address information 5 about the mismatched table contents, and information 6 about the contents, corresponding to the change table information.

Station B (B) checks the mismatch information and if the mismatch information corresponds to the change table information (OK).
, sends a table switching command to station A (A) (6). Further, as shown in FIG. 4, if the mismatch information does not correspond to the change table information (NG), it is left alone.

In this case, address information 2 and content information 3 of the change table information sent to station A (A) are stored in a register, etc., and address information 5 and content information 6 of the returned mismatch information are compared respectively. By doing so, the discrepancy information becomes O
It is possible to easily identify whether the result is K or NG.

Upon receiving the table switching command, station A (A) transfers the contents of the first table TBI to the second table TB2 under the control of the read control circuit RC and the write control circuit WC, and changes the contents. I do.

That is, as shown in FIG. 3, the first and second tables TBI
, change the contents of TB2 so that they are the same. Upon completion of this change, a table switching completion notification is sent to station B (B). This allows station B (B) to confirm that the contents of the table of station A (A) have been reliably changed.

Also, as shown in Figure 4, in the case of NG, the V of station A [A]
/ita timer TIM times out (7), then the contents of the first table TBI are changed according to the contents of the second table TB2 to match the contents of the second table TB2, and the changes are made. It returns to the previous state.

In addition, station B (B) confirmed the returned discrepancy information and the result was NG.
When it is determined that this is the case, the change table information can be left as is or the change table information can be sent again.

Also, when the table contents of B station (B) are sent to A station (A) as change table information, if the table contents of B station CB) and the table contents of A station (A) match, B station C
The discrepancy information sent back to B) indicates that there is no discrepancy, and the B station (B) can confirm the table contents of the A station (A). Also, it goes without saying that the confirmation timer TIM can be constructed using registers and memories like other timers.

DETAILED DESCRIPTION OF THE INVENTION As described above, in the present invention, when one station, for example, station B, changes the table contents of another station, for example, station A, (8) the changed table information is sent from one station to the other station. Then, the other station changes the contents of the first table TBI and starts the confirmation timer TIM, then compares the contents of the first and second tables TBI and TB2 and sends the discrepancy information to the one station. Send it back. It is checked whether this discrepancy information corresponds to the changed table information, and if so, a table switching command is sent. This table switching command causes the other station to switch to the first table TB.
The contents of the second table are changed according to the contents of I so that the contents of the two tables match, and a table switching completion notification is sent to one station, thereby terminating the table contents changing process. Also, if the mismatch information does not correspond to the change table information, one station is left as is, so the confirmation timer TIM of the other station is
times out, which causes the second table TB
2, the contents of the first table TBI are changed to the previous table contents, and it is possible to accurately change the table contents from one station to the other station. Another advantage is that it is easy to check whether the table contents match between stations (9).
This results in a highly reliable system.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of a system in which each station is equipped with a first and second table, FIG. 2 is a block diagram of a main part of an embodiment of the present invention, and FIGS. 3 and 4 are embodiments of the present invention. This is a sequence chart. CT is a master station, RT1 to RTn are slave stations, and TBI. TB2 is a first and second table, TTM is a confirmation timer, WC is a write control circuit, and RC is a continuation control circuit. Patent Applicant Fujitsu Ltd. Representative Patent Attorney Shoji Aiya Representative Patent Attorney Hiroshi Watanabe - (10) Figure 4 rAl A three-day prisoner in Sui's room. NG meeting 9+j neglect 353-

Claims (1)

[Claims] A plurality of stations are connected by a line or a channel, each station is provided with a first table and a second table, and Wj recognizes that the contents of the first and second tables are the same and then processes. In the system, one station sends change table information for changing table contents to another station, and the other station changes the contents of the first table based on the change table information and also starts a confirmation timer. , and then compares the contents of the first and second tables and sends discrepancy information to the one station;
When the one station confirms that the mismatch information corresponds to the change table information, it sends a table switching command to the other station, and the other station, in response to the table switching command, After changing the contents of the second table with the contents of the first table and making them match, a table switching completion notification is sent to the one station, and it is confirmed that the mismatch information does not correspond to the changed table information. 1), the one station leaves it as it is, and the other station changes the contents of the first table with the contents of the second table due to the timeout of the confirmation timer, and returns both to the previous contents. A table information transfer processing method characterized by matching.