JPH077962B2 - Transmission control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is provided between a central control and monitoring device (master station) and a transmission terminal device (slave station) to reduce the processing load of the central control and monitoring device. The present invention relates to a transmission control device that operates.

[Prior Art] A configuration of a conventional polling system will be described with reference to FIG.

FIG. 4 is a block diagram showing a conventional polling system.

In FIG. 4, the conventional polling system includes a central control monitoring device (1) and a plurality of transmissions of NO. 1, 2, ..., N connected to the central control monitoring device (1) via transmission lines. It is composed of a terminal device (2).

Next, the operation of the above-mentioned conventional example will be described.

The central control monitoring device (1) directly polls the transmission terminal device (2). That is, the transmission terminal devices (2) are sequentially inquired at regular intervals to collect the data of the transmission terminal devices (2).

[Problems to be Solved by the Invention] In the conventional system as described above, the central control and monitoring device (1) side can detect the state change of the transmission terminal device (2) only in the polling cycle, and There has been a problem that status changes from the transmission terminal device (2), upper / lower limit abnormalities / recovery, pulse data over, etc. can be detected only in the polling cycle.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to obtain a transmission control device capable of collecting the latest data of a transmission terminal device, which in turn reduces the processing load of the central control monitoring device. The purpose is to make it lighter and to process the entire system faster.

[Means for Solving the Problems] A transmission control device according to the present invention is a transmission control device connected between a master station and a plurality of slave stations, and is a master station that transmits and receives messages to and from the master station. A transceiver unit, a master station message analysis unit that analyzes a message from the master station, and a notification permission address storage unit that stores the address of the slave station to be notified transmitted from the master station as a notification permission address, A polling information storage unit that stores polling information transmitted from the master station, a polling message generation unit that generates a polling message to a slave station to be polled based on the polling information, and the plurality of slave stations. A slave station transmitting / receiving section for transmitting / receiving a message, a slave station message analyzing section for analyzing a message from the slave station, a data storage section for storing polling data transmitted from the slave station, and the master station. To generate the report message of It is provided with a report message generation unit and a response message generation unit for generating a response message to the master station, and the slave station message analysis unit is configured so that the signal received by the slave station transmission / reception unit is a notification message. In the case of, when the polling data in the data storage unit is updated and the address of the slave station that has transmitted the notification message is stored as the notification permission address in the notification permission address storage unit, the notification transmission generation unit If a notification message relating to the updated polling data is generated and transmitted to the master station via the master station transmitting / receiving unit, the response message generating unit, if there is a polling data transmission request from the master station, A response message relating to polling data stored in the data storage unit is generated and transmitted to the master station via the master station transmission / reception unit.

[Operation] In the present invention, when the signal received by the slave station transmission / reception unit is a notification message by the slave station message analysis unit, the polling data in the data storage unit is updated and the slave unit that transmitted the notification message. When the address of the station is stored as the notification permission address in the notification permission address storage unit, the notification transmission generation unit generates a notification message relating to the updated polling data, and the parent station transmission / reception unit is used to generate the notification message. Transmitted to the station.

Further, when the response message generation unit requests the transmission of polling data from the master station, a response message relating to the polling data stored in the data storage unit is generated and the master station is transmitted via the master station transmission / reception unit. Transmitted to the station.

[Embodiment] The configuration of an embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a block diagram showing a transmission control device (3), which is an embodiment of the present invention, connected between a central control and monitoring device (1) and a transmission terminal device (2).

In FIG. 1, one embodiment of the present invention is a master station transmitting / receiving unit (4) connected to a central control and monitoring device (1) and a master station message analysis connected to this master station transmitting / receiving unit (4). Division (5)
A notification permission address storage unit (6) connected to the master station message analysis unit (5); a polling information storage unit (7) connected to the master station message analysis unit (5); A response message generation unit (8) connected to the transmission / reception unit (4) and the master station message analysis unit (5), and a notification connected to the master station transmission / reception unit (4) and the notification permission address storage unit (6) Message generator (9)
, A polling message generation unit (10) connected to the polling information storage unit (7), a data storage unit (11) connected to the response message generation unit (8), and a polling message generation unit (1).
0) and the slave station transmitter / receiver (12) connected to the transmission terminal device (2), and the child connected to the data storage unit (11), the slave station transmitter / receiver unit (12) and the notification message generation unit (9). It consists of a local message analysis unit (13).

Next, the operation of the above-described embodiment will be described with reference to FIGS. 2 and 3.

FIG. 2 is a flow chart showing the operation of an embodiment of the present invention, and FIG. 3 is a data storage section (1
It is explanatory drawing which shows the content of 1).

In FIG. 3, changes in the state of the transmission terminal device (2) are shown in time series in the order of (a), (b) and (c).

First, the transmission control device (3) is a central control monitoring device (1).
The address information of the transmission terminal device (2) to be notified transmitted from is stored in the notification permission address storage unit (6) as a notification permission address. Similarly, the polling information such as the transmitted polling period and the address of the transmission terminal device (2) to be polled is stored in the polling information storage unit (7).

In steps (20) to (21), the slave station message analysis unit (1
3) determines whether or not the signal received by the slave station transmitting / receiving unit (12) is a notification message from the transmission terminal device (2), and if it is (YES), the data storage unit (11). ) Update polling data. This message is ON → OFF or OFF →
It is sent from the transmission terminal device (2) when an ON state change occurs. For example, when the state change of ON → OFF occurs in the transmission terminal device (2) of NO.1, the polling data in the data storage unit (11) is changed from FIG. 3 (a) to (b).
As shown in.

In steps (22) to (24), if the address of the transmission terminal device (2) of NO.1 exists in the notification permission address storage unit (6) (YES), the notification message of the state change from ON to OFF. Is generated by the notification message generation unit (9) and transmitted to the central control monitoring device (1) via the master station transmission / reception unit (4).

In steps (25) to (28), if there is an address of the transmission terminal device (2) to be polled and it is time to execute polling, a polling message is generated by the polling message generation unit (10). , Child station transceiver (12)
Is transmitted to the transmission terminal device (2) via the. For example, the NO.n transmission terminal device (2) in the polling information storage unit (7)
If there is an address of NO.n, polling of the transmission terminal device (2) of NO.n is executed.

When the polling response message is returned from the NO.n transmission terminal device (2) in steps (29) to (30) (YE
S) is stored in the data storage unit (1) by the slave station message analysis unit (13).
1) Polling data is updated. For example, when an ON → OFF state change occurs in the NO.n transmission terminal device (2), the polling data in the data storage unit (11) is as shown in FIG. 3 (b) to (c). become.

Further, if there is a polling data transmission request from the central control monitoring device (1), the response message generating unit (8) returns the polling data from the data storage unit (11).

Thus, the polling data in the data storage unit (11) is updated by the notification message and the polling response message, so that the central control monitoring device (1) can obtain the latest polling data when needed. .

As described above, the embodiment of the present invention performs only the processing related to polling, and therefore has the effect of enabling swift processing.

In the above embodiment, the polling cycle and the like can be easily changed by a command from the central control monitoring device (1).

Further, in the above embodiment, the state change of ON → OFF and OFF → ON is reported to the central control monitoring device (1), but other upper / lower limit abnormality / recovery, pulse data over, etc. can also be reported.

[Effect of the Invention] As described above, the present invention is a transmission control device connected between a master station and a plurality of slave stations, and a master station transmitting / receiving unit that transmits / receives a message to / from the master station, A master station message analysis unit that analyzes a message from the master station, a notification permission address storage unit that stores, as a notification permission address, an address of a slave station to be reported transmitted from the master station, and the master station A polling information storage unit that stores the transmitted polling information;
A polling message generation unit that generates a polling message to the slave station to be polled based on the polling information,
A slave station transmitting / receiving unit that transmits / receives a message to / from the plurality of slave stations, a slave station message analyzing unit that analyzes a message from the slave station, and a data storage unit that stores polling data transmitted from the slave station. And a notification message generation unit that generates a notification message to the parent station, and a response message generation unit that generates a response message to the parent station, the slave station message analysis unit, When the signal received by the slave station transmitter / receiver is a notification message, the polling data in the data storage unit is updated, and the address of the slave station that transmitted the notification message is used as a notification permission address in the notification permission address storage unit. When stored, the notification transmission generation unit generates a notification message relating to the updated polling data and transmits it to the master station via the master station transmission / reception unit, and the response message generation unit Request to send polling data from the master station In some cases, the transmitting the data storage unit to generate a response Denbun about polling data stored to the master station through the master station transceiver unit,
The latest data of the transmission terminal device can be collected, and the processing load of the central control monitoring device can be reduced, and the processing of the entire system can be speeded up.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a flow chart showing an operation of the embodiment of the present invention.
FIG. 3 is an explanatory view showing the contents of the data storage unit of an embodiment of the present invention, and FIG. 4 is a block diagram showing a conventional polling system. In the figure, (1) ... central control monitoring device, (2) ... transmission terminal device, (3) ... transmission control device, (4) ... master station transceiver unit, (5) ... master station message Analyzing unit, (6) ... report permission address storage unit, (7) ... polling information storage unit, (8) ... response message generation unit, (9) ... report message generation unit, (10) ... … Polling message generation unit, (11) …… Data storage unit, (12) …… Slave station transmission / reception unit, (13) …… Slave station message analysis unit. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A transmission control device connected between a master station and a plurality of slave stations, the master station transmitting / receiving unit transmitting / receiving a message to / from the master station, and analyzing a message from the master station. Master station message analysis unit, notification permission address storage unit that stores the address of the slave station to be reported transmitted from the parent station as a notification permission address, polling information storage unit that stores the polling information transmitted from the parent station , A polling message generation unit that generates a polling message to a slave station to be polled based on the polling information, a slave station transmission / reception unit that transmits / receives a message to / from the plurality of slave stations, and a message from the slave station. A slave station message analysis unit for analyzing, a data storage unit for storing polling data transmitted from the slave station, a notification message generation unit for generating a notification message to the master station, and a response message to the master station Responses that generate sentences The slave station message analysis unit updates the polling data in the data storage unit and transmits the notification message when the signal received by the slave station transmission / reception unit is a notification message. When the address of the station is stored as the notification permission address in the notification permission address storage unit, the notification transmission generation unit generates a notification message relating to the updated polling data and outputs the notification message via the master station transmission / reception unit. When the master station transmits a request for polling data transmission, the response message generation section generates a response message regarding the polling data stored in the data storage section and transmits / receives data to / from the master station. A transmission control device, which transmits to the master station via a unit.