JP4592196B2 - Supervisory control system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a monitoring control system that monitors and controls the operating state of an industrial system such as a power system and water and sewage using a computer.
[0002]
[Prior art]
In recent years, in a monitoring control system that monitors and controls the operating state of an industrial system such as an electric power system and a water and sewage system, it is required to construct a system that can cope with widening, large scale, and advanced functions of the monitoring control target. It is also important to ensure its reliability.
[0003]
FIG. 17 shows a configuration diagram of a conventional monitoring control system.
In the conventional supervisory control system, the supervisory control device has a hierarchical configuration from a lower-level control device or supervisory control device close to the control target device to a higher-level supervisory control device at the central command center level. However, the communication network itself for connecting these monitoring and control devices does not have a hierarchical configuration as shown in FIG. 17, and the higher-level monitoring and control device 1 and the lower-level layer are connected to the network 5 of one layer. The monitoring control device 2 and the control device 3 that controls the control target device 4 are connected to the monitoring control device of each layer.
[0004]
In addition, the communication path has been duplexed to improve the reliability of the supervisory control system, but normally one of the systems is used, and the other communication path is installed as a spare in the event that one of the communication paths fails. Did not use.
[0005]
Further, when the control devices are duplicated, all control information is transmitted to the communication path from both the master side and slave side control devices.
[0006]
[Problems to be solved by the invention]
However, as described above, when many monitoring control devices of various function layers are connected to a single layer network, detailed information necessary only for monitoring control of lower function layers is transmitted to all networks. As a result, the amount of communication becomes excessive, causing a communication delay.
[0007]
Also, even when the communication paths are duplicated, usually only one system is used, so that a transmission rate twice as high as that required when both communication paths are used is required. In addition, when the control devices are duplicated, the same type of information is transmitted twice from both the master and slave control devices, so the communication load on the communication path and monitoring control device is excessive. . For this reason, it was necessary to use expensive and highly functional communication equipment.
[0008]
The present invention has been made in view of the above circumstances, and reduces communication load on the communication path and improves responsiveness by dividing and transmitting / receiving data using a multi-layer communication path having a hierarchical structure. It is another object of the present invention to provide a reliable monitoring and control system.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a monitoring control device group that acquires data indicating the state of the control target device from the control target device and controls the control target device based on the acquired data. In the monitoring control system constructed from a control network and a communication network using a multiplex communication path that connects the monitoring control device group and the control device in a hierarchical configuration according to the monitoring control content, the control device includes: Each monitoring control device and communication means for transmitting / receiving data to / from each control device, and dividing the data and transmitting it to all communication paths via the communication means, and receiving the divided and transmitted data via the communication means Communication control means, and the communication control means is controlled by the control device. Header information and With the master side sending the actual data Send header information In the case where the slave side that does not transmit actual data is divided and has a multiplex configuration, the amount of transmission information on the slave side is reduced.
[0010]
According to a second aspect of the present invention, in the supervisory control system according to the first aspect, when a part of a multiplex communication path fails, the communication control means uses a normal communication path to transmit data shorter than normal. It is characterized by performing communication periodically.
[0011]
According to a third aspect of the present invention, in the supervisory control system according to the second aspect, the communication control means performs communication at a transmission cycle longer than that at the time of failure when the communication path failure is recovered.
[0012]
According to a fourth aspect of the present invention, in the supervisory control system according to any one of the first to third aspects, when the communication control means receives and reproduces the divided and transmitted data, a transmission delay or information is transmitted to a part of the data. In the case where a drop occurs, the received data is reproduced by removing the transmission delay and data whose information has been dropped.
[0014]
Claims 5 In the invention of claim 4 The monitoring control system described above is characterized in that the control device on the slave side detects a failure of the control device on the master side and changes from the slave side to the master side.
[0015]
Claims 6 In the present invention, claims 1 to 5 The described monitoring control system is characterized by comprising a communication state monitoring means for monitoring a communication state and a communication amount in the monitoring control system.
[0016]
Claims 7 In the invention of claim 6 The monitoring control system described above further includes communication state storage means for storing a communication state and a communication amount in the monitoring control system acquired by the communication state monitoring means.
[0017]
Claims 8 In the present invention, claims 1 to 7 In the described supervisory control system, it is connected to both the upper network layer and the lower network layer, and obtains the information of the control device directly from the lower network layer and from the lower network layer to the upper network layer. An integrated monitoring control means for acquiring the information is provided.
[0018]
Claims 9 In the present invention, claims 1 to 8 In the monitoring control system described above, a dedicated reception data area for each control device is provided in the memory of the monitoring control device.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a configuration of a monitoring control system according to an embodiment of the present invention.
As shown in the figure, this supervisory control system has a hierarchical configuration of supervisory control device groups 101 and 102, a control device 103, and communication networks 106 and 107 connecting them, and the higher-level supervisory control device 101 is an upper level. In the hierarchical network 106, the lower-layer monitoring control device 102 is connected to the lower-layer network 107. In the present embodiment, the upper layer and lower layer communication networks 106 and 107 and the control device 103 connected to the lower layer network 107 are all duplicated.
[0021]
Here, data indicating the state of the control target device 104 is transmitted from the control device 103 to the lower layer network 107, and the data transmitted from the plurality of control devices 103 is transmitted to the special router 105. The special router 105 transmits information necessary for the upper layer monitoring control device to the upper layer communication network 106.
[0022]
FIG. 2 is a detailed diagram of a portion that performs data communication inside the control apparatus 103, and data communication is performed by the communication units 121 and 122 and the communication control unit 123. FIG. 3 is an example of data used for communication. The state data is divided and transmitted by the communication control unit 123. FIG. 3A shows data indicating the state of the control target device 104, and FIG. 3B shows divided data transmitted to the duplex communication path. An example of data
[0023]
The state data 131 shown in FIG. 3A is divided and transmitted by the communication control means 123 in the order of data A, B, C, D,. To the data A, B, C, D,..., Serial numbers 1, 2, 3, 4,... Are added to the header portion of the data and the divided data A, B, C, D,. Are alternately sent to the communication means 121 and 122. That is, data A132, data C133,... Are sent to the communication means 121, and data B134, data D135,... Are sent to the communication means 122, and the data divided via the communication means 121, 122 is sent to the lower layer communication network 107. Sent to.
[0024]
The monitoring control device on the receiving side is also provided with the same communication function (communication means, communication control means) as the control device, and the divided data is received via the communication means, and the received data is received by the communication control means. It is used as monitoring data in the order of the counter numbers in the header part.
[0025]
In this way, the status data of the control target device is divided and transmitted using the duplex communication path evenly, so only one duplex communication path is used as in the conventional supervisory control system. Compared to the case where the other is used for standby or when the same data is transmitted to both systems twice, the amount of transmission data can be reduced by half and the data transmission cycle of one system can be doubled. it can. As a result, the communication load can be reduced, the transmission waiting time can be shortened, and the responsiveness of the communication network can be improved.
[0026]
Further, considering the case where a failure occurs in the communication path of one system, it is periodically detected whether the communication means 121, 122 has a response to the lower layer monitoring control device 102 or the special router 105 which is the communication destination. Add a function to monitor communication path abnormalities. For example, in Ethernet, when there is no communication state, it is confirmed whether or not a link with a communication destination is established by transmitting and receiving link pulses to each other. There is also a method for confirming whether the communication destination can be accessed by pinging.
[0027]
When a failure occurs in the communication path connected to the communication means 122, the communication means 122 notifies the communication control means 123 that there is no response from the communication destination and that a failure has occurred in the communication path. Upon receiving this notification, the communication control means 123 stops using the communication means 122 and controls to perform data communication using only the communication means 121 connected to the normal communication path.
[0028]
FIG. 4 shows an example of data when the state data 131 of FIG. 3A is transmitted using only a normal communication path, that is, the communication means 121. The communication control unit 123 divides the state data 131 in the order of data A, B, C, D,... And adds serial numbers 1, 2, 3, 4,. . The data A201, data B202, data C203, data D204,... Are sequentially transmitted via the communication means 121. At this time, the transmission cycle from the communication means 121 is set to a half of the transmission cycle when both duplex communication channels are normal, that is, when both duplex communication channels are used. For example, if both communication paths are normal and the communication means 121 and 122 transmit every 200 ms, but only the communication means 121 transmits every 100 ms, even when a one-system communication path is used. The same data transmission speed as when using both systems can be maintained.
[0029]
In this way, when a communication path of one system fails, data is transmitted without causing a transmission delay compared to the normal time because data is transmitted at a normal transmission cycle using a normal communication path. Can be done.
[0030]
Further, when the communication path that has failed is restored and communication is possible, for example, when the communication path connected to the communication means 122 that has failed is recovered, the communication means 122 is recovered to the communication control means 123. Notify that. Upon receiving this notification, the communication control means 123 resumes the use of the communication means 122 and controls to perform data communication using both of the communication means 121 and 122. Data transmitted using only one system as shown in FIG. 4 is again divided and transmitted equally using both systems as shown in FIG. 3B. The transmission cycle of both systems at this time is set to double the transmission cycle when only one system is used. For example, if what is transmitted every 100 ms using only the communication unit 121 is transmitted every 200 ms using both the communication units 121 and 122, the communication load on the communication path can be reduced. .
[0031]
In this way, when the failed communication path is restored, data communication is performed again using the communication paths of both systems, and the communication cycle is reduced by double the transmission cycle. As a result, the responsiveness of the supervisory control system can be improved.
[0032]
Next, data reception processing of the lower layer monitoring control apparatus will be described. FIG. 5 shows a detailed view of a portion that performs data communication inside the lower layer monitoring control apparatus 102. Similar to the control device, data communication is performed by the communication units 401 and 402 and the communication control unit 403. The communication means 401 and 402 are connected to the lower layer network 107. Here, of the duplex communication channels, the communication channel to which the communication unit 401 is connected is referred to as the first system, and the communication channel to which the communication unit 402 is connected is referred to as the second system.
[0033]
The communication control unit 403 receives the status data of the control target device transmitted from the control device via the lower layer network 107 and the communication units 401 and 402. As described above, the data transmitted from the control device is divided and transmitted alternately to the duplex communication path. An example of data received by the lower layer monitoring control device is as shown in FIG. It is a lot of data. Data 411, 412, and 413 are 1-system data received by the communication unit 401, and data 414, 415, and 416 are 2-system data received by the communication unit 402. These data are sent to the communication control means 403 and received in the order of counter numbers in the header part. In this example, since the data is transmitted from the control device in the order of data A, B, C, D, E, and F, they are received in ascending order of the counter numbers, that is, in the order of data 411, 414, 412, 415, 413, 416. The Then, the data portion (data A, B, C,...) Excluding the header is used for monitoring as data from the control device in the order of reception.
[0034]
Here, a case is considered in which transmission delay or information loss occurs in some data when receiving and reproducing data transmitted in a divided manner. For example, it is assumed that the transmission of the data 412 is delayed and the data 412 is received after the data 415 is received. The data is received in the order of counter numbers 1, 2, 4, 3, 5, and 6 and reproduced in the order of data A, B, D, C, E, and F. In this order, the original data is correctly restored. Not.
[0035]
Therefore, the counter numbers are compared, and when data having a counter number smaller than the previously received counter number is received, it is determined that transmission delay or information loss has occurred, and the data is discarded. In the above example, playback is performed in the order of A, B, D, E, and F, and C is discarded.
[0036]
Here, the processing flow of the communication control means 403 after receiving the status data from the control device will be described with reference to the flowchart of FIG.
The communication control unit 403 compares the received data with a counter number for each communication system. In the present embodiment, since data is alternately transmitted to the duplex communication path (1 system, 2 system), processing is performed alternately for each system of 1 system and 2 systems.
[0037]
First, initial setting is performed. When processing is performed for one system, the communication system number a is set to 1, and the counter number C1 = 0 in the header portion of the data received last time is set (step S1).
[0038]
And the communication control means 403 acquires the reception data of the communication means of the communication system number a (step S2). If a = 1, the received data of the first system, that is, the communication means 401 is acquired.
[0039]
The acquired received data is separated into a header part and a data part (step S3), and the counter number C2 of the header part and the data of the data part are read and stored temporarily (steps S4 and S5).
[0040]
Then, the previous value (C1) and current value (C2) of the counter number of the data part are compared, and it is determined whether or not the data is received in the order of the counter numbers (step S6). The counter number C1 received last time is compared with the value of the current counter number C2 stored in step S4. If C2> C1, the process proceeds to step S7. If C2 ≦ C1, the data skips steps S7 and S8, and step S9. Proceed to
[0041]
C2> C1 is a case where the value of the counter number is larger than the previous value, and it is determined that the data has been received in order. In this case, C1 = C2 is set in order to receive the next data, the previous counter number C1 is updated to the current counter number C2 (step S7), and the data portion accumulated information of the data received up to the previous time is updated to the step. The data part information received this time temporarily stored in S5) is additionally stored (step S8). In the example of FIG. 6, whenever data A, B, C,... Is received, data A + B + C + D + E + F +. Then, the process proceeds to step S9.
[0042]
On the other hand, C2 ≦ C1 is a case where the value of the counter number is smaller than the previous value, and it is determined that the data is not received in order. In this case, it is determined that transmission delay or information loss has occurred, and the data received this time is discarded. Then, the process proceeds to step S9. In step 9, it is determined whether or not a code indicating the end of the received data is attached to the header portion of the data. If the received data is the last, the process is terminated. If the received data is not the last, the process proceeds to step S10, and the communication system from which data is next acquired is designated (step S10 to step S12). That is, by setting the communication system number a to a = a + 1, the communication system number for acquiring data next is designated. For example, the next communication system number is designated, such as 2 systems if the current system is 1 system and 3 systems if the current system is 2 systems. If the designated communication system number a exceeds the number of communication systems (a> number of communication systems), a = 1 is returned to the first communication system, and data is received in the same manner. Here, since the duplex (1 system, 2 system) communication path is used, the number of communication systems is 2, and the communication system number a is alternately designated as a = 1, 2, 1, 2,. Is done. And it returns to step S2 (422), the same process is repeated about the designated communication system number, and the same process is repeated until the last data is received. Thus, data can be alternately received from the communication means 401 and 402.
[0043]
In this way, when reception data delay or the like occurs, it is possible to observe the order of reception data and perform data reception processing without delay.
[0044]
This process can be performed according to the processing procedure from step S1 to step S12 based on a computer program stored in advance in a storage medium. That is, the storage medium storing the computer program is readable and executable by the monitoring control device group and the control device, and includes at least steps S1 to S12.
[0045]
As another embodiment, a case will be described in which data communication is performed by using a dual control device separately for the master side and the slave side. FIG. 8 shows the configuration of the control device (master side, slave side) for a device to be controlled with the supervisory control system shown in FIG. 1 in an easy-to-understand manner. In addition, the same code | symbol is attached | subjected to the same or equivalent part as the structure shown in FIG. 1, and the description is abbreviate | omitted. The dual control devices 1031 and 1032 are connected to the first and second systems of the lower layer network 107, respectively, and monitor the state of the control target device 104. The control device 1031 is the master side, and the control device 1032 is the slave side.
[0046]
FIG. 9 shows an example of data transmitted from the control device. Data 511 is data transmitted from the control device 1031 to the first system, data 512 is data transmitted from the control device 1031 to the second system, data 513 is data transmitted from the control device 1032 to the first system, and data 514 is data transmitted from the control device 1032 to the second system. Indicates the type of data sent to the system. As shown in the figure, the transmitted data consists of header information called H_BEAT (heartbeat) and M / S (master-slave index) and a real data part. H_BEAT indicates a cal counter when data is alternately transmitted from each control device, and M / S indicates information for determining the master and slave of the control device that transmitted the data. The actual data part is data indicating the state of the device to be controlled, and is data transmitted to the monitoring control device and used for monitoring. The actual data is transmitted only from the control device 1031 on the master side, and not transmitted from the control device 1032 on the slave side. By reducing the amount of transmission information from the slave-side control device in this way, it is possible to reduce the amount of network transmission information and reduce the communication load on the communication path.
[0047]
Further, as shown in FIG. 10, when the control device 1031 and the control device 1032 are connected by the state communication line 601, the operation state of the control device can be notified to each other, whether or not the other control device is operating normally. It becomes possible to detect. For example, during the operation of the control device, the master-side control device 1031 transmits the header portion (H_BEAT, M / S) of the data 511 to the slave-side control device 1032 at regular intervals. On the contrary, the control device 1032 on the slave side transmits the data 513 to the control device 1031 on the master side at regular intervals. In this way, by periodically transmitting the H_BEAT and M / S information to the other control device, it is possible to grasp the operation state of each other control device.
[0048]
At this time, when the slave-side control device 1032 detects that the header information from the master-side control device 1031 is not transmitted in a predetermined cycle, the slave-side control device 1032 determines that the control device 1031 has failed, and the slave-side control device 1032 Change to. The control device 1032 is a master that also transmits an actual data portion such as data 511 and 512 from a state on the slave side where only H_BEAT and M / S information is transmitted to the communication path as data 513 and 514 in FIG. Will be changed to the state of the side.
[0049]
In this way, when the master-side control device fails, the slave-side control device becomes the master side instead of the failed control device, so that the same data as before the failure can be transmitted. As a result, it is possible to ensure reliability even when the amount of transmission information is reduced.
[0050]
Further, if a communication state monitoring unit 701 as shown in the monitoring control system configuration diagram of FIG. 11 is provided, it is possible to monitor the communication state and the communication amount in the monitoring control system. The communication status monitoring unit 701 is connected to the upper layer network 106, acquires all status data in the monitoring control system via the special router 105, and performs monitoring.
[0051]
FIG. 12 shows an example of data sent to the upper layer network via the special router 105. The data sent from each control device to the lower-layer network 107 is a data type (data 511 to data 514) as shown in FIG. 9, but the data (data 511, 512) sent from the control device on the master side is The special router 105 synthesizes the real data portion as data 711 and adds information regarding the state of the entire control device as special router additional data. The combined data is transmitted to the upper layer network 106 together with the header information of H_BEAT and M / S. Data (data 513, 514) transmitted from the control device on the slave side passes through the special router 105 as it is.
[0052]
FIG. 13 is a diagram showing an internal configuration of the communication status monitoring unit 701. Data transmitted to the communication status monitoring unit 701 via the special router 105 is stored in a transmission buffer 722 that is a memory. Data 723 is data transmitted from the control device on the master side, and data 724 is data transmitted from the control device on the slave side. Since these data are transmitted doubly using the 1-system and 2-system communication networks, they are stored in the transmission buffer 722 twice. However, the H_BEAT information causes data to be transmitted periodically. Etc. can be detected. Information in the transmission buffer 722 is appropriately edited and displayed by the communication status display means 721. Since all data transmitted from each control device is stored in the transmission buffer 722, the communication status monitoring unit 701 can grasp the communication status and traffic in the network. In addition, it is possible to grasp the faulty communication path and the status of one-system communication based on the transmission cycle and data contents of the received data stored in the transmission buffer 722.
[0053]
At this time, as shown in FIG. 14, by providing a communication state storage unit 801 as an auxiliary storage device, the communication state and communication amount of the monitoring control system accumulated in the transmission buffer 722 of the communication state monitoring unit 701 are stored. It may be. In this case, the data stored in the transmission buffer 722 is sequentially stored in the communication state storage unit 801, and the stored communication state can be displayed on the communication state display unit 721. As a result, it is possible to display and confirm a history of past communication states.
[0054]
In this way, it is possible to grasp the communication status, communication volume, data omission, control device failure, communication path failure, so that it is possible to easily grasp the status of the entire network of the supervisory control system. It is possible to respond quickly to network failures. In addition, since it is possible to grasp the past state of the supervisory control system, it is possible to easily analyze the failure tendency of devices and networks, and to improve the reliability of the supervisory control system.
[0055]
Although the case where the communication state storage unit 801 is provided inside the communication state monitoring unit 701 is shown here, the same effect can be obtained when the communication state storage unit 801 is provided outside the communication state monitoring unit 701.
[0056]
Further, if an integrated monitoring control unit 901 as shown in the monitoring control system configuration diagram of FIG. 15 is provided, it is possible to monitor data of both the lower layer network and the upper layer network. The comprehensive monitoring control unit 901 is connected to both the upper layer network 106 and the lower layer network 107 and can receive data from both networks.
[0057]
As a result, not only the status data from the control device 103 can be acquired via the special router 105, but also data transmitted and received by the lower layer monitoring control device 102 can be directly acquired and grasped. As described above, the integrated monitoring control unit 901 can acquire both data received directly from the dual lower layer network 107 and data received from the dual upper layer network 106 via the special router 105. Thus, data can be acquired in quadruple, and the reliability of the monitoring control system can be further enhanced.
[0058]
Furthermore, it is possible to improve the data processing efficiency by providing a dedicated reception data area for each control device in the memory of the lower layer monitoring control device 102. FIG. 16 is a diagram showing a reception data area provided in the memory of the lower layer monitoring control apparatus 102. The reception data area 1000 is an area for receiving and temporarily storing data from each control device. However, since the conventional communication method has one port number for UDP / IP communication, a plurality of control devices are provided. Data is stored in the same storage area in the order of reception, and data is likely to be lost.
[0059]
As shown in the figure, a port number 1001 is assigned to the control device 1031a, a port number 1002 is assigned to the control device 1032a, a port number 1003 is assigned to the control device 1031b, and a port number 1004 is assigned to the control device 1032b. A dedicated area for each port is secured, and each received data is temporarily stored therein.
[0060]
As a result, it is possible to identify a large number of control devices and receive data at a time, thereby improving data processing efficiency. When data is received from a large number of control devices at once and the communication load is high, it is possible to prevent data loss and improve reliability, which is very effective.
[0061]
The upper layer monitoring control device can also receive data in the same manner.
[0062]
In this embodiment, the case where a duplex communication channel is used has been described. However, the same effect can be achieved by performing data communication in the same manner even when a triple communication channel or more is used. Can be obtained.
[0063]
【The invention's effect】
As described above, in the monitoring and control system of the present invention, the communication load of the communication path is reduced by using the multiplexed communication paths in the hierarchical configuration to enable transmission and reception by dividing the data. As a result, it becomes possible to realize a highly reliable monitoring control system.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a monitoring control system according to an embodiment of the present invention.
FIG. 2 is a detailed view of a portion that performs data communication in the control device shown in FIG.
3A is a diagram showing an example of status data of the control target device shown in FIG. 1, and FIG. 3B is a diagram showing an example of data transmitted from the control device.
4 is a diagram showing an example of transmission data when a failure occurs in the communication path of the monitoring control system shown in FIG.
FIG. 5 is a detailed view of a portion that performs data communication in the lower-layer monitoring apparatus shown in FIG.
6 is a diagram showing an example of data received by the lower layer monitoring apparatus shown in FIG.
7 is a flowchart of processing of the communication control means shown in FIG.
FIG. 8 is a diagram showing another embodiment of the control device shown in FIG.
9 is a diagram showing an example of data transmitted from the control device shown in FIG.
10 is a diagram showing an example in which a state communication line is provided in the control device shown in FIG. 8;
11 is a diagram showing an example in which communication state monitoring means is provided in the monitoring control system shown in FIG.
12 is a view showing an example of data transmitted through the special router shown in FIG.
13 is a block diagram showing the internal configuration of the communication status monitoring means shown in FIG.
14 is a diagram showing an example in which communication state storage means is provided in the communication state monitoring means shown in FIG.
15 is a diagram showing an example in which an integrated monitoring control unit is provided in the monitoring control system shown in FIG.
FIG. 16 is a diagram showing a reception data area provided in the memory of the lower layer monitoring control apparatus shown in FIG. 1;
FIG. 17 is a configuration diagram of a conventional monitoring control system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,101 ... Upper hierarchy monitoring control apparatus, 2,102 ... Lower hierarchy monitoring control apparatus, 3, 103, 1031, 1031a, 1031b, 1032, 1032a, 1032b ... Control apparatus, 4, 104, 104a, 104b ... Control object apparatus 105 ... Special router, 5 ... One layer network, 106 ... Upper layer network, 107 ... Lower layer network, 121,122,401,402 ... Communication means, 123,403 ... Communication control means, 131-135, 201- 204, 411-416, 511-514, 711, 723, 724 ... data, 601 ... status communication line, 701 ... communication status monitoring means, 721 ... communication status display means, 722 ... transmission buffer, 801 ... communication status storage means, 901: Integrated monitoring control means, 1000: Received data area

Claims (9)

Monitoring control device groups and control devices that acquire data indicating the status of the control target devices from the control target devices and control the control target devices based on the acquired data, and monitor and control these monitoring control device groups and control devices In a monitoring and control system constructed from a communication network using multiple communication paths connected by a hierarchical configuration according to the contents,
The control device is configured to transmit and receive data to and from each of the monitoring control devices and the control devices, and to divide the data and transmit the data to all communication paths via the communication means, and the divided and transmitted data Communication control means for receiving, reproducing, and recognizing via the communication means,
The communication control means, when the control device is divided into a master side that transmits header information and actual data and a slave side that transmits header information and does not transmit actual data, and has a multiplex configuration, the transmission information on the slave side A supervisory control system characterized by reducing the amount.   2. The supervisory control system according to claim 1, wherein, when a part of a multiplex communication path fails, the communication control means performs communication using a normal communication path with a transmission cycle shorter than normal. Supervisory control system.   3. The supervisory control system according to claim 2, wherein when the communication path failure is recovered, the communication control means performs communication with a transmission cycle longer than that at the time of the failure.   4. The supervisory control system according to claim 1, wherein the communication control means receives a transmission delay or information drop in a part of the data when receiving and reproducing the divided and transmitted data. A monitoring and control system that reproduces received data excluding data that has been lost or information is lost.   5. The monitoring control system according to claim 4, wherein the slave-side control device detects a failure of the master-side control device and changes from the slave side to the master side.   6. The monitoring control system according to claim 1, further comprising communication state monitoring means for monitoring a communication state and a communication amount in the monitoring control system.   7. The monitoring control system according to claim 6, further comprising communication state storage means for storing a communication state and a communication amount in the monitoring control system acquired by the communication state monitoring means.   8. The supervisory control system according to claim 1, wherein the supervisory control system is connected to both the upper network layer and the lower network layer, and acquires the information of the control device directly from the lower network layer and from the lower network layer to the upper network layer. A monitoring control system comprising an integrated monitoring control means for acquiring via a network hierarchy.   9. The supervisory control system according to claim 1, wherein a dedicated reception data area for each controller is provided in the memory of the supervisory controller.

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