JP2006304024A - Duplex remote surveillance control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a transmission load of inside of a slave station device, and to enable deviations in reception timing of control information in a 1st system and a 2nd system to be coped with. <P>SOLUTION: In a duplex remote surveillance control system, the control information is to be transmitted, in parallel from an upper level system 1 to processing units 5, 6 for opposing to upper level stations; and the slave station device is designed to confirm both pieces of the control information, whether firstly receiving or secondly receiving, to transmit one of the both pieces of the control information from a processing unit 7 for opposing to lower level stations in a main system side to a lower level system 10, and to delete the other pieces of the control information. The processing units for opposing to the upper level stations are each designed to transmit the received control information to the processing unit for opposing to the lower level stations, and the processing unit for opposing to lower level stations is designed to confirm the both pieces of the control information whether firstly receiving or secondly receiving. The processing unit for opposing to the lower level stations is designed, to once return the firstly received control information from one of the processing units for opposing to the upper level stations to the both processing units for opposing to the upper level stations. The processing units for opposing to the upper level stations are each designed to re-transmit to the processing unit for opposing to the lower level stations, in the same way, when receiving the control information from the upper level system responding to the reply of the control information; while the processing unit for opposing to the lower level stations includes deletion of the control information to be retransmitted as having been received already. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dual remote monitoring and control system that transmits monitoring control information in parallel between a host system and a slave station device by using a transmission line that is duplexed into the first and second systems. Information selection method.

  FIG. 3 shows a configuration example of this type of dual remote monitoring and control apparatus. The host system 1 and the slave station device 2 transmit the monitoring information (uplink information) or the control information (downlink information) to the first system and the second system pair slave station transmission devices 3 and 4 on the higher system side, and the slave station device. The data is transmitted in parallel between the first system and the second system of the upper station processing units 5 and 6 via the dual transmission line. In the slave station device 2, the monitoring information and the control information are exchanged in parallel between the upper-level station processing units 5, 6 and the lower-level station processing units 7, 8 (main system). The system switching unit 9 switches to the main system side of the lower-level station processing units 7 and 8, and transmits monitoring information and control information between the lower-level station processing unit on the main system side and the lower system 10.

  In this way, in the system in which the upper station processing units 5 and 6 and the lower station processing units 7 and 8 are both configured in a duplex system to improve reliability, control information is transferred from the upper system 1 to the slave station device 2. When transmitting in parallel, the slave station device 2 receives the same control information at two locations, but selects the control information received first in time, transmits this to the lower system 10 only once, The control information received later is discarded (for example, see Patent Document 1).

  Here, the upper station processing units 5 and 6 confirm whether or not the control information has been received by the first and second systems, and then notify the lower-level station processing unit 7 on the main system side of the transmission of the control information. To do. For this confirmation, there is a method of performing serial number management in which the management number is attached to the control information on the upper system 1 side, and the counter processing units 5 and 6 transmit the received control information numbers to each other to perform collation processing. . As another confirmation method, there is a method that eliminates the need for serial number management by transmitting the control information itself to each other and confirming each other by the match / mismatch.

The slave station device 2 receives one macro control command from the host system 1, and the command is divided into a plurality of control information in the slave station device 2, and the divided control information is sent to the lower system 10. There is also a macro control system in which the lower system 10 is sequentially controlled by continuously transmitting.
Japanese Patent Laid-Open No. 7-131943

  In the conventional dual system information transmission method, the slave station apparatus needs to perform confirmation processing for exchanging information between the 1st system and the 2nd system in the upper station processing units 5 and 6, and the transmission load inside the slave station apparatus increases. .

  Also, when a large number of control information is continuously received, such as when the lower system is sequence-controlled by the macro control method, there may be a time difference in reception depending on the reception timing and the mutual confirmation timing of the first and second systems. Since it is predicted that it will occur, the confirmation process becomes complicated due to such countermeasures.

  The above problems become conspicuous in a method of confirming by matching / mismatching of control information itself, and a significant increase in transmission load and complication of confirmation processing become problems.

  An object of the present invention is to provide a dual remote monitoring control system that solves the above problems.

  In order to solve the above-mentioned problem, the present invention, the 1st system and 2nd system upper-level station processing units respectively receiving the control information respectively transmit the control information to the lower-level station processing unit without first-arrival confirmation, By confirming the control information in the lower-level station processing unit, the transmission load inside the slave station device is reduced.

  Further, the lower-level station processing unit once returns the first-arrival control information transmitted from one higher-level station processing unit to both the first-level and second-level higher-level processing units, and both of the responses to this control information return. By processing the control information as if the control information was received from the higher system in the host station processing unit, it is possible to deal with the problem of the reception timing difference between the 1-system and 2-system control information in the macro control system or the like.

  From the above, the present invention is characterized by the following method.

(1) The control information is transmitted in parallel from the host system to the slave station device via a transmission line that is duplicated into 1 system and 2 system.
The slave station device receives the control information transmitted in parallel from the host system by the first and second system processing units for the upper station, confirms the first and second reception of both control information, and sends one of the two control information as the main information. In the dual remote monitoring control system that transmits to the lower system from the lower-level station processing unit on the system side and discards the other control information,
The system 1 and system 2 upper station processing units respectively transmit the received control information to the main system lower station processing unit,
The lower-level station processing unit confirms first-to-last reception of both control information.

(2)) Control information is transmitted in parallel from the host system to the slave station device via a transmission line that is duplicated into 1 system and 2 system.
The slave station device receives the control information transmitted in parallel from the host system by the first and second system processing units for the upper station, confirms the first and second reception of both control information, and sends one of the two control information as the main information. In the dual remote monitoring control system that transmits to the lower system from the lower-level station processing unit on the system side and discards the other control information,
The system 1 and system 2 upper station processing units respectively transmit the received control information to the main system lower station processing unit,
The lower-level station processing unit temporarily returns the first-arrival control information transmitted from one higher-level station processing unit to both the 1-system and 2-system higher-level processing units,
The first-system and second-system upper-level station processing units retransmit the control information from the lower-level station processing unit to the lower-level station processing unit in the same manner as when control information is received from the higher-level system. And
The lower-level station processing unit discards control information to be retransmitted as already received.

  As described above, the present invention has the following effects.

  (1) The first and second higher-order station processing units that received the control information respectively transmit the control information to the lower-order station processing unit without confirming the arrival of the control information, and the lower-order station processing unit transmits the control information. Since the confirmation is performed, it is not necessary to exchange information between the first-system and second-system upper-level station processing units, and the transmission load inside the slave station apparatus is reduced.

  (2) The lower-level station processing unit once returns the first-arrival control information transmitted from one higher-level station processing unit to both the first-system and second-line higher-level processing units, and both respond to the return of this control information. By processing as if the control information was received from the host system, even if the reception timing of the 1st system and the 2nd system in the macro control system is shifted, the slave station device can perform simple processing. It becomes possible to process at the same timing.

  Also, for example, if the transmission line of the upper system station of the second system is abnormal, even if the macro control command is received from the first system and the upper system processing unit of the first system stops during processing, 2 It is possible to continue macro control even in the case of a double failure, for example, processing is continued in the system processing unit for the host system.

(Embodiment 1)
FIG. 1 is a configuration diagram of a dual remote monitoring and control apparatus showing an embodiment of the present invention, which is equivalent to FIG. 3 in the system configuration, but the control information confirmation processing method in the slave station apparatus 2 is different.

  Regarding the control information, when receiving the control information, the upper station processing unit 5.6 transmits the control information as it is to the main lower station processing unit 7, and the lower station processing unit 7 receives the control information from the upper station processing unit 5.6. Of the transmitted control information, only the first-arrival control information is stored and transmitted to the lower system 10, and the reception of the control information is confirmed by collation with the later-arrived control information. Information shall be discarded.

  For example, the slave station device 2 is processed in the order of times t1 to t5 shown in FIG. First, when the upper station processing unit 5 receives control information from system 1 (time t1), this control information is transmitted to the lower station processing unit 7 (time t2), and this control information is transmitted to the lower station processing unit. 7 is transmitted to the lower system 10 through the system switching unit 9 (time t3). Thereafter, when the upper station processing unit 6 receives control information from the second system (time t4), this control information is transmitted to the lower station processing unit 7 (time t5). The lower-level station processing unit 7 uses the control information received from the second system, confirms the reception by comparing with the control information received first, and discards it because it is the last arrival. As a result, control information is transmitted only once to the lower system. At this time, the upper-level station processing units 5 and 6 do not confirm whether or not the control information notified to the lower-level station processing unit has been discarded, The processing is sequentially performed assuming that its own control information is being processed.

  Therefore, according to the present embodiment, it becomes unnecessary for the upper station processing units 5 and 6 to exchange information with each other in order to confirm whether or not the control information has been received. The transmission load is reduced.

(Embodiment 2)
FIG. 2 is a block diagram of a dual remote monitoring control apparatus showing an embodiment of the present invention, which is equivalent to FIG. 1 in the system configuration, but the control information confirmation processing method in the macro control method is different.

  In the first embodiment, the upper station processing unit determines that the control information notified by itself is processed in both the first and second systems, and simplifies the processing. For example, as in the macro control method, In the case where the lower system is controlled sequentially, when the timing of receiving control information from the upper station is greatly shifted, the processing is proceeded without any match in the upper station processing units 5 and 6 thereafter. there is a possibility.

  In consideration of the above possibility, in the present embodiment, when macro control information from the upper station processing units 5 and 6 is received by the main lower station processing unit 7, Once the response is made to the upper station processing unit 5.6 of both the 1st system and the 2nd system, the macro control information of the later arrival is discarded, and when the upper station processing units 5 and 6 receive the above reply, A method for starting control processing is adopted.

  For example, when the slave station device 2 receives the macro control information first, the slave station device 2 is processed in the order of times t1 to t8 shown in FIG. First, when the upper station processing unit 5 receives the macro control information from the system 1 (time t1), the macro control information is notified to the lower station processing unit 7 (time t2), and this macro control information is received first. Therefore, it is once returned to the 1st system and 2nd system to the upper station processing units 5 and 6 (time t3). The host station processing units 5 and 6 each start macro control, and sequentially start transmission of control information (time t4, t5). Similar to the first embodiment, these control information is transmitted once to the lower system 10 by the lower station processing unit 7 (time t6). Thereafter, when the upper station processing unit 6 receives the macro control information from the second system (time t7), the macro control information is transmitted to the lower station processing unit 7 (time t8). With respect to this macro control information, the subordinate station processing unit 7 has already been received (time t2), and is discarded.

  In the slave station device 2, when the second system receives the macro control information first, the lower-level station processing unit 7 once returns this control information to the first-level and second-level higher-level station processing units 5 and 6. Thereafter, when the 1-system receives the macro control information, the lower-level station processing unit 7 to which the macro control information has been transmitted has already been received and discarded.

  Therefore, according to the present embodiment, even when the reception timing of macro control information received in parallel from the host system is deviated, it is possible to perform processing at the same timing with simple processing in the slave station device. In addition, for example, if the transmission line of system 2 is abnormal, even if a macro control command is received from system 1 and the processing unit of system 1 is stopped during processing, Macro control can be continued even when a double failure occurs, such as when processing is continued in the processing unit 6.

FIG. 3 is a confirmation processing procedure diagram of the dual remote monitoring and control apparatus according to the first embodiment of the present invention. FIG. 6 is a confirmation processing procedure diagram of a dual remote monitoring control apparatus showing Embodiment 2 of the present invention. 2 is a configuration example of a dual remote monitoring and control apparatus.

Explanation of symbols

1 Host system 2 Slave station device 3 Slave station transmission device (1 system)
4 Peer station transmission equipment (system 2)
5 Upper-level station processing section (1 system)
6 Upper station processing part (system 2)
7 Subordinate station processing section (main system)
8 Lower-level station processor (secondary)
9 System switching part 10 Sub system

Claims (2)

Control information is transmitted in parallel from the host system to the slave station device via a transmission line that is duplicated into 1 system and 2 system.
The slave station device receives the control information transmitted in parallel from the host system by the first and second system processing units for the upper station, confirms the first and second reception of both control information, and sends one of the two control information as the main information. In the dual remote monitoring control system that transmits to the lower system from the lower-level station processing unit on the system side and discards the other control information,
The system 1 and system 2 upper station processing units respectively transmit the received control information to the main system lower station processing unit,
The dual-system remote monitoring and control system characterized in that the lower-level station processing unit confirms first-arrival reception of both control information. Control information is transmitted in parallel from the host system to the slave station device via a transmission line that is duplicated into 1 system and 2 system.
The slave station device receives the control information transmitted in parallel from the host system by the first and second system processing units for the upper station, confirms the first and second reception of both control information, and sends one of the two control information as the main information. In the dual remote monitoring control system that transmits to the lower system from the lower-level station processing unit on the system side and discards the other control information,
The system 1 and system 2 upper station processing units respectively transmit the received control information to the main system lower station processing unit,
The lower-level station processing unit temporarily returns the first-arrival control information transmitted from one higher-level station processing unit to both the 1-system and 2-system higher-level processing units,
The first-system and second-system upper-level station processing units retransmit the control information from the lower-level station processing unit to the lower-level station processing unit in the same manner as when control information is received from the higher-level system. And
The dual-system remote monitoring and control system, wherein the lower-level station processing unit discards control information to be retransmitted as already received.

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