JPH1013973A - Remote supervisory and controlling method and system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently supervise and control operational states of plural slave station devices and the operation state of equipment and to provide high reliability. SOLUTION: This system connects a master station device 1 and slave station devices 12 through a telephone line 15, and supervises and controls main machinery, including valves and pumps and a main board (object to be controlled equipment) 13 by the device 1. In such cases, the device 1 is provide with a parameter part 8 which registers specialty, importance, priority and relationship of position information, furthermore, a slave station state based on specialty, importance, priority and relationship of position information from the device 12 is decided by a slave station state identification processing part 7, an urgent instruction to the slave station is automatically answered back when abnormality which needs readiness is detected, an answer back calling time is shortened and high reliability is obtained. And a sequence or cycle of polling and search based on speciality, importance, priority and relationship of position information is changed and the efficient and optimum control is attained by forming a closed loop among slave station devices.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring control system having a master station apparatus and a slave station apparatus to be controlled, and more particularly, to efficiently monitor the operation state of the slave station apparatus and the operation state of facilities. The present invention relates to a remote monitoring control method and system having controllable high reliability.

[0002]

2. Description of the Related Art For example, water supply and sewerage facilities or
In the control of agricultural water facilities or power substations and power plants, remote monitoring control that has a master station device and slave station devices, and that the master station device monitors and controls devices to be controlled connected to the slave station devices. The system has been adopted. Such a conventional remote monitoring and control system, based on information transmitted from a slave station via a communication line such as a telephone line, for example, a flow rate of a device connected to a certain slave station, sets a corresponding valve valve to a computer serving as a master station. It is common to calculate and control automatically, or adjust it to an appropriate amount by an operator manually.

As an example of such a prior art, for example, Japanese Patent Laid-Open Publication No. Sho 59-122151 discloses that in a communication system in which a plurality of stations are connected to a bus, all node stations circulate in a predetermined order. Accordingly, a technique for reliably performing communication has been disclosed.

Further, Japanese Patent Laid-Open Publication No.
According to Japanese Patent Application Laid-Open No. 3-279693, regarding a so-called monitoring method in the slave station itself, when a state change occurs in an important monitoring item of the slave station, a word including the item is transmitted to the master station in a short cycle. Thus, there is known a device that reduces the processing capacity load on the master station and improves the monitoring efficiency.

Further, conventionally, for example, Japanese Unexamined Patent Application Publication No. 3-119
According to Japanese Patent Publication No. 895, regarding the control by the slave station itself, the slave station sends data from the slave station to the master station in an order corresponding to the weight (parameter) of the monitoring target data sent from the master station, or According to Japanese Patent Application Laid-Open No. HEI 1-229633, it is already known that the order of polling of a master station with respect to slave stations is dynamically changed according to the degree of occurrence of abnormality in slave station information.

[0006] A remote monitoring apparatus, particularly a remote station apparatus, is disclosed in, for example, Japanese Patent Application Laid-Open No. 61-3219.
According to the publication No. 9, regarding the control in the slave station itself,
In order to improve transmission efficiency, the slave station determines the order in which information is sent from the slave station to the master station according to the deviation (previous value−current value) and importance (weight) of the measurement value input by the slave station. There is a known method.

Further, in the conventional system, when a slave station device is called from a master station device by a polling method, since information is collected by inquiring at a fixed period, all information can be obtained only at a fixed period. There was an inconvenience. As a method for solving the problem in the related art, for example, according to Japanese Patent Application Laid-Open No. 4-35249, when a signal received by a slave station transmitting / receiving unit by a slave station transmission analyzing unit is a notification message, When the polling data in the data storage unit is updated, on the other hand, when the polling data is stored as the report permission address of the slave station that transmitted the report message, the report transmission generation unit generates a report transmission relating to the updated polling data, and A technique for reducing the processing load on the entire system and speeding up the processing by transmitting the data to the system has been disclosed.

[0008]

However, in these conventional systems, for example, when the rate of change in the flow rate (other than pressure, voltage, current, etc.) of the monitored object becomes a certain value or more, or when an emergency shutoff valve command is issued, In the device control requiring urgency, a so-called time lag occurs, such as the time required for transmission to the computer as described above, the processing time for the time required, or a time delay for passing through judgment due to human beings. There was a problem.

[0009] In particular, in the technique described in the above-mentioned 4-35249, first, since the slave station is successively called from the master station to perform communication opposition between the master station and the slave station, the communication efficiency is low.
Responsiveness is lacking when an abnormality or the like occurs in the slave station.

In the technique described in Japanese Patent Laid-Open Publication No. Sho 59-122151, since the opposite transmission right from the master station (clock station) to the slave station (node station) is in a fixed order, the slave station has an error. Occurs,
Alternatively, even when a communication failure occurs between the master station and the slave station, the transmission right order is not changed, and the number of transmission end detection pulses is counted to recognize the end of communication between the master station and the slave station. I had to change it. For this reason, when the order of the transmission right is arbitrarily changed, or when an abnormal condition occurs in the slave station and the transmission right is abandoned, it is necessary to change a time constant such as elimination of the abnormal slave station No. Inconveniences such as a stoppage of the apparatus due to a change and modification are likely to occur.

Furthermore, the above-mentioned JP-A-63-279693, JP-A-3-119895, and JP-A-61-32199 each control the slave station itself, and control information is sent from the master station to the slave station. Not something. JP-A-1-296
Reference numeral 833 indicates that when the master station polls the slave station, the master station changes the polling order. Therefore, the control is performed by the master station itself, and there is no way to send control information from the master station to the slave station.

An object of the present invention is to solve the above-mentioned problems in the prior art and to provide a highly efficient and flexible remote monitoring control method and system. In the present invention, in particular, the operation state of the slave station device and the operation state of the equipment are efficiently monitored by the master station, and the efficiency of the slave station is determined in accordance with the valve opening, the rate of change in the flow rate, the presence or absence of an abnormal signal, etc. It is an object of the present invention to provide a remote monitoring control method and system that provide high reliability by performing dynamic control.

[0013]

SUMMARY OF THE INVENTION The present invention relates to a remote monitoring system for connecting a master station device and a plurality of slave station devices via a transmission line, and for monitoring and controlling devices connected to the slave station device from the master station device. In the control system, the master station device determines a slave station state based on data or position information collected from the slave station device, and requires control of the slave station device,
A remote monitoring control method for transmitting control information for the slave station device and / or other slave station devices to the slave station device is disclosed.

Further, according to the present invention, in the remote monitoring control system for connecting a master station device and a plurality of slave station devices via a transmission line, and monitoring and controlling a device connected to the slave station device from the master station device, In the station device, the slave station state is determined based on the data or position information collected from the slave station device, and when the communication method in the slave station device needs to be changed, it is transmitted from the slave station device to the master station device. Information indicating the communication method to be used,
A remote monitoring control method for transmitting to the slave station device and / or another slave station device is disclosed.

Further, according to the present invention, in a remote monitoring control system for connecting a master station device and a plurality of slave station devices via a transmission path, and monitoring and controlling devices connected to the slave station device from the master station device, The master station device determines the slave station state based on the parameter of interest of the position information collected from the slave station device, and when it is necessary to change the control or communication method of the slave station device, A remote monitoring control method is disclosed in which information indicating that fact is transmitted to another slave station device, and the slave station device changes control or communication method based on this information.

Further, according to the present invention, in a remote monitoring control system for connecting a master station device and a plurality of slave station devices via a transmission line, and monitoring and controlling devices connected to the slave station device from the master station device, The master station device has means for determining a slave station state based on data or position information collected from the slave station device, and, when control is required for the slave station device, transmits the control information to the corresponding slave station device or other Means for sending to the slave station device;
Disclosed is a remote monitoring control system provided with.

Further, according to the present invention, in a remote monitoring control system for connecting a master station device and a plurality of slave station devices via a transmission line, and monitoring and controlling devices connected to the slave station device from the master station device, The master station device includes means for determining the status of the slave station based on data or position information collected from the slave station device, and information indicating the communication method when the slave station device requires a communication method. A remote monitoring control system provided with a unit for transmitting to a station device or another slave station device is disclosed.

Further, according to the present invention, in the remote monitoring control system for connecting a master station device and a plurality of slave station devices via a transmission line, and monitoring and controlling devices connected to the slave station device from the master station device, The master station device includes a unit that determines a slave station state based on the parameter of interest of the position information collected from the slave station device, and a control change to the slave station device or a change in the communication method. A remote monitoring control system having means for transmitting information indicating the fact to the slave station device and / or other slave station devices, and the slave station device having means for changing control or communication method based on the information. Is disclosed.

To achieve the above object, according to the remote monitoring control system proposed by the present invention, a master station device and a plurality of slave station devices are connected by a transmission line, and the master station device is connected to the slave station device. In the remote monitoring control system that monitors and controls the devices connected to the device, the master station device has at least one of the specificity, importance, priority, and relevance of the position information collected from the slave station device. A slave station state identification processing unit is provided for automatically sending an emergency command to the slave station apparatus when the slave station state is determined based on the slave station apparatus and an abnormality requiring responsiveness is detected in a certain slave station apparatus.

Also, in order to achieve the above object,
In a communication control method for a remote monitoring control system proposed by the present invention, a master station device and a plurality of slave station devices are connected via a transmission line, and from the master station device, a device connected to the slave station device is connected. A communication method of a remote monitoring control system for monitoring and controlling, comprising: determining an abnormality requiring responsiveness in said slave station device from position information transmitted from said slave station device, and determining an abnormality requiring responsiveness in said slave station device. Is detected, an emergency command to the slave station device is automatically sent from the master station device.

As described above, in the remote monitoring control system and the communication control method therefor according to the present invention, when an abnormality requiring responsiveness is determined in the slave station device, the determination is made by a host controller such as a computer, or By automatically transmitting an emergency shut-off valve operation command or the like as an answer-back signal to the relevant slave station device without performing any determination due to human beings, the answer-back transmission time can be reduced or reduced, and Provide a highly reliable device.

According to the embodiment of the present invention described in detail below, further, position information serving as a criterion, its specificity (change rate of flow rate, urgency, priority, etc.) and importance In addition, the relevance of the other station information and other position information referred to when forming a closed loop is made resident as a parameter section so that it can be modified each time it is changed or modified. Further, in the case where the master station device is a polling method (slave station calling method) or a sequential search method of calling slave stations in a specific order, in addition to the above-described determination, specificity, importance, priority, By changing the polling order or polling cycle according to the relevance, it is possible to form a closed loop between slave stations flexibly and quickly. Furthermore, the above parameters are
The versatility of the device is improved by making it possible to change it arbitrarily from an equal loading tool. In the case where the present system uses a polling (calling) method from the master station device to the slave station device or a sequential search method in which the slave stations are called in a specific order, a polling order / period change device is added and the system is changed according to the specificity of the position information. By changing the polling (search) order or polling cycle to allow a closed loop between slave stations freely, it is possible to perform communication control with high communication efficiency and high flexibility.

[0023]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. First, FIG. 1 shows an example of a system configuration in a case where a remote monitoring control system according to the present invention is applied to, for example, water and sewage facilities, substation facilities, and the like. As shown in FIG. In this example, a plurality of master stations 1 (however, only one master station 1 is shown in this figure) is connected to a host computer 2 via a system bus 3. Further, a plurality of slave station devices 12, 12,... To be controlled by the remote monitoring control system, and pumps, valves, reservoirs, etc., or circuit breakers, disconnectors, switches, relays, etc., which are original control target devices connected thereto. Main equipment 1
Are connected to the master station device 1 via the slave station devices 12, 12 and so on via a communication line (for example, an NTT line) 15, which is an information transmission line.

In the system configuration of such a remote monitoring control system, first, an operation start command or an operation stop command in response to a command from an operator is sent to the slave station device 12 by the master station device 1. The input data is edited by the monitoring control unit 5 in the master station device 1, converted into a slave station transmission protocol in the transmission / reception unit 6, and then transmitted through the modem 9. And transmitted to each slave station device 12.

On the other hand, the operation state data (or position information) of the main units 13, 13,... Transmitted from the plurality of slave units 12, 12,. The data is input to the processing unit 6 and displayed on the monitoring control console 10 and its graphic panel by the monitoring control unit 6. Then, according to the displayed content,
The operator sees, for example, the flow rate in the main device 13 controlled by a certain slave station device 12 (for example, a pump of the slave station 2), and checks the main machine device 13 controlled by the slave station 12 upstream thereof.
(For example, opening and closing valves related to the flow rate of the slave station 1), thereby performing the optimization control by man. The operation state data of the main units 13, 13,... Sent from the plurality of slave station apparatuses 12, 12,... Include, for example, start / stop of a pump, flow rate of a reservoir, operation state of a valve, or And abnormalities in the slave station device 12 (specifically, program abnormalities, hardware abnormalities, etc.), as well as abnormalities of the communication (NTT) line 15 (congestion, line disconnection, etc.).

In the above-described series of operations, if there is no monitoring control console 10 or monitoring control unit 5, the computer 2 operates in an automatic computer operation mode. That is,
Information from the slave station 12 input from the transmitting / receiving unit 6 in the same manner as described above is input to the computer 2 via the higher-level interface unit 4 and the system bus 3, thereby executing a closed loop such as flow rate adjustment. Form.

In the control method of the master station device 1 and the slave station device 12 in the present invention, the uniqueness of the position information or word information transmitted from the slave station devices 12, 12,. , A slave station state identification processing unit 7 for determining importance, priority and relevance, and a parameter unit 8 connected thereto.

Here, the position information collected from each of the slave station devices 12, 12,... Is, for example, information on the start / stop state of the pump, the flow rate of the reservoir, the state of the circuit, and the like. Further, in the present invention, the uniqueness of the position information means that the information transmitted from the slave station devices 12, 12,... Is not a simple status signal or a light failure signal, but is, for example, remarkably a system or slave station. Refers to the state of the degree affecting the main engine / main board. The importance of the position information means the degree of urgency of the information transmitted from the slave station devices 12, 12,..., And therefore, the degree of responsiveness required. Further, the priority of the position information in the present invention refers to the above-mentioned slave station devices 12 and 12.
.. Are assigned priorities of processing according to the content of the signal, and the relevance of the position information is related to the specific information from the plurality of slave station devices 12, 12,. This means that the optimization of the target reservoir or water distribution reservoir or the like is not performed by the slave station device alone, but is performed by a plurality of slave station devices in an organic manner, and is performed by the entire system.

In the slave station state identification processing section 7,
It is automatically determined from the data registered in the parameter unit 8 whether the information sent from a certain slave station device 12 is an abnormality that requires responsiveness, such as an abnormal flow rate change or an emergency stop of the pump. Then, as a result, when an abnormality requiring a prompt response such as a flow rate change rate abnormality or a pump stop of a certain slave station is detected, control information such as an emergency shut-off valve operation command is sent to the slave station of the channel as a response. The data is automatically sent out as an answer back without going through a judgment by a higher-level control device such as the computer 2 or an operator. That is, control information such as an emergency shut-off valve operation command is sequentially or simultaneously transmitted to one or a plurality of slave stations 12, 12... Of the channel via the transmission / reception unit 6 and the modem 9. .
The destination of the answer-back transmission of the emergency shut-off valve operation command and the like, that is, the transmission target channel slave station is parameterized.

In the parameter section 8, the specificity, importance, priority, and relevance of the position information are parameterized, and these parameters are set to a PC (PC) which is a loading tool connected to the master station apparatus 1. It can be arbitrarily changed by loading from a personal computer or the like via a (personal computer) unit 16. That is, the position information serving as a determination reference and its specificity (rate of change in flow rate, urgency, priority, etc.) and its importance, and further forming a closed loop with another slave station device described in detail later. The relevance and the like with other position information to be referred to is made resident in the parameter section 8 as a parameter, and this can be corrected by a personal computer or the like every time a change or modification is made. The resolution of the parameter of the parameter unit 8 includes, for example, an abnormality of the communication (NTT) line 15, an abnormality of the main unit of the slave station device, and a change rate of the drainage flow rate. Has a control function of freely forming a closed loop between the slave stations 12, 12,... When the abnormality or the like is detected by position information or a word corresponding to the registered parameters.

In the present invention, in the above-mentioned slave station state identification processing section 7, the ON / OFF condition of information from a certain slave station apparatus 12 or the data amount is also controlled by the parameter section 8. Under the condition that the rate of change is equal to or greater than a certain value, control information indicating an instruction to form a closed loop is sent from the master station device to the specific slave station devices 12, 12,.
2, 12,... Receive this control information and freely form a closed loop between slave stations. This requires that the slave station devices 12, 12,... Have a configuration capable of forming a closed loop.
In other words, the master station / main board 13, 13,... Of the related slave station devices 12, 12,. This allows optimization control to be performed between slave stations without the intervention of a slave station.

Further, according to the present invention, the transmission / reception unit 6 can instruct various slave stations to various communication methods. The communication method is a data transmission method, a transmission order, a transmission data format, a transmission cycle, a frequency, and the like, and includes all possible communication methods to be transmitted from the slave station to the master station. It may also include a communication method for forming a closed loop between slave stations. Specific examples of the communication method include a polling method (slave station calling method), a sequential search method for calling slave stations in a specific order, a CDT method, an HDLC method, and a change of these frequencies. In the case of the polling method or the sequential search method, in addition to the above-described determination (determination of whether or not an abnormality requiring responsiveness), in addition to the above-mentioned slave station state identification processing section 7 and the above-mentioned parameter section 8, the master station apparatus 1 Polling order / period changing device 17 which is a polling period changing device provided therein
Changes the polling (search) order or polling cycle in accordance with the specificity, importance, priority, and relevance of the position information. That is, the parameter unit 8 such as the peculiarity in the polling method, in other words, the position information and the like coming from the polled slave station 12.
According to the specificity registered in the, the polling order of the slave stations 12 can be arbitrarily changed, or by changing the polling cycle, it is possible to form a closed loop between slave stations flexibly and quickly, It is possible to perform communication control with high communication efficiency and high flexibility.

Note that the peculiarity of the polling method is that the parameter section 8 contains a slave station number, position information,
The change rate of the measured value is registered in advance, and when an abnormality occurs in a certain slave station 12, the slave station state identification processing unit 7 changes the polling order according to the registration of the parameter unit 8, or The polling cycle of the slave station or the relevant slave station is advanced or delayed according to the parameter cycle, so that necessary information of the system can be freely collected.

Next, in the remote monitoring control system described above in detail, in the remote monitoring control system, the local station state identification processing section 7 and the parameter section 8 are formed by a cyclic transmission or HDLC transmission procedure which is a normal data transmission in the system.
The operation of the master station device 1 including the above processing will be described in detail with reference to the flowchart shown in FIG.

First, when the processing is started (START),
In step A10 of FIG. 2, communication between the master station and the slave station (NT
T) It is checked whether or not traffic congestion / line disconnection has occurred on the line. As a result, if normal (in the case of “N”), the process proceeds to the received data determination processing of the slave station in step A20.

On the other hand, if traffic congestion / line disconnection occurs in step A10 (in the case of "Y"), the process proceeds to step A10.
The process jumps to step 110, where it is checked that the search for all the slave stations has been completed. Further, in step A115, the slave station NO is incremented, and the process returns to step A10 again to receive the data of the next slave station. .

After step A20, step A30
Then, it is checked whether the received data is a position or a word registered in the parameters of the parameter section 8, and if the received data corresponds to the registered parameters ("Y").
Is not transferred to the host computer 2 or the monitoring control unit 5,
The process branches to the next step according to the contents of the setting parameter.

In the branch of this step, first, if the received position corresponds to the emergency shutoff valve registered in the parameter, the process proceeds to step A40, where the slave station of the channel (CH) designated by the parameter is set. An emergency stop command is sent as answer back.

On the other hand, when the received data corresponds to the detection of the change rate of the measured value or more, for example, when the difference between the previous value and the present value (previous value−current value) is more than a certain value, in step A50,
As this answer back, a command for adjusting the control of the valve of the reservoir in the upstream system is transmitted.

Further, when there is a state change in the relevant position, that is, when a state change occurs in the parameter position corresponding to the closed loop, the received data itself is sent back to the channel corresponding to the parameter in step A60, or in step A70. A control output command is issued to a plurality of channels corresponding to the parameters. Alternatively, in step A80, other parameter corresponding processing is performed.

In step A30, if the received data does not correspond to the parameter, that is, if the received data does not correspond to the registered parameter ("N"),
The process proceeds to step A80, and the received data is transferred to the host computer 2 or the monitoring control unit 5 as it is.

Thereafter, when the above-described series of procedures is completed, the process proceeds to step A100, where it is checked whether or not the search of all words has been completed. As a result, if all words have not been completed ("N"), the word address is incremented in step A105, and the process returns to the initial operation in step A10 again.

On the other hand, if it is determined in step A100 that the search for all words has been completed ("Y"), it is further checked in step A110 whether the search for all slave stations has been completed. When finished ("N")
In step A115, the mobile station No. is advanced.
Thereafter, the process returns to the initial operation step A10. On the other hand, in the case of termination (“Y”), all reception data processing is completed (END), and a new reception interrupt is awaited.

The operation of the master station apparatus 1 including the processing of the slave station state identification processing section 7 and the parameter section 8 by the polling method or the sequential search method will be described in detail with reference to the flowchart shown in FIG. First, the process starts (STA
RT), at step B10 in FIG. 3, it is checked whether or not congestion / line disconnection has occurred on the communication (NTT) line between the master station and the slave station. N)), in step B20, poll the slave stations according to the order of the parameters and collect data. Thereafter, in step B30, the process proceeds to the received data determination processing of the slave station.

On the other hand, if traffic congestion / line disconnection occurs in the above step B10 (in the case of "Y"), the process proceeds to step B10.
The process jumps to step 120, where it is checked that the search for all the slave stations has been completed. Further, in step B130, the order in which the slave stations face each other is increased, and the process returns to step B10 again to receive the data of the next slave station. I do.

Next, after step B30, in step B40, it is checked whether the received data is a position or a word registered in the parameters of the parameter section 8, and if the received data corresponds to the registered parameters. In the case of "Y", the process is not transferred to the host computer 2 or the monitoring control unit 5, but branches to the next step depending on the contents of the setting parameter.

That is, in the step branch, first,
(1) When the received position corresponds to the emergency shutoff valve registered in the parameter, (2) when the received data corresponds to the detection of the change rate of the measured value or more, for example, the difference between the previous value and the current value (previous value− Is higher than a certain value,
(3) There is a change in the state of the related position, that is,
If a state change has occurred in the corresponding parameter position in the closed loop, the process proceeds to step B70, and it is determined whether the corresponding parameter is a change in polling order or a change in cycle. As a result, if it is determined that the polling cycle has been changed (“cycle change”), the process proceeds to step B80, and the polling cycle is changed to the corresponding parameter. On the other hand, if it is determined that the polling order has been changed (“order change”), the process proceeds to step B90, and the polling order is changed to the corresponding parameter.

In step B40, when the received data does not correspond to the parameter, that is, when the received data does not correspond to the registered parameter ("N"),
The process proceeds to step B50, and the received data is transferred to the host computer 2 or the monitoring control unit 5 as it is.

Thereafter, when the above-described series of procedures is completed, the process proceeds to step B100, where it is checked whether or not the search of all words has been completed. As a result, if all words have not been completed ("N"), the word address is incremented in step B110, and the process returns to the initial operation in step B10 again.

On the other hand, if it is determined in step B100 that the search of all words has been completed ("Y"), it is further checked in step B120 whether or not the opposition of the slave stations has been completed. In this case ("N"), the process proceeds to step B130, in which the order of opposing child stations is increased, and thereafter, the process returns to the initial operation step B10. On the other hand, in the case of termination ("Y"), the slave station facing order is returned to the initial value, all the received data processing is completed (END), and a new reception interrupt is awaited.

Subsequently, various operation patterns shown in FIGS. 2 and 3, that is, operations in a branch of steps executed after the processing procedure shown in step A 30 in FIG. 2 and step B 40 in FIG. Patterns, especially
Emergency stop command etc. transmission pattern ("Emergency shut-off valve applicable"),
The transmission pattern corresponding to the change rate abnormality detection (“measurement value change rate abnormality detection”), the closed loop applicable transmission pattern (“the relevant position has a state change”), the polling order change pattern shown in FIG. 3, and the polling The detailed contents of the cycle change pattern (SS common polling cycle) 1 and the polling cycle change pattern (SS individual polling cycle) 2 will be described taking the reception data parameter, the transmission data parameter, or the polling order parameter as an example.

FIG. 4 shows a case of an example of a transmission pattern such as an emergency stop command. In this case, in the master station apparatus 1, data is received by the transmission / reception section 6, and the data is transmitted to the slave station state determination processing section 7 and the parameter. The unit 8 determines whether or not the parameter corresponds to the emergency stop command parameter registered. When the received data corresponds to the emergency stop parameter, for example, in the case of No.
= 1, SS1, W2, P3 are ON and SS3, W
1, when P5 is ON, SS2, W5 and P1 of transmission data 1 are turned ON using transmission channel (CH) 1 and sent to the slave station. Here, SS1 and SS3 are slave stations (numbers)
1, 3; W2, W1 indicate words 2, 1;
3 and P5 indicate positions 3 and 5, respectively. Thus S2
2. A command to urgently stop the position P1 of W5 is issued.
It will be sent to the slave station S22. In addition, No. = 2
-No. Pattern examples up to N are registered. Similarly, if it is applicable, a command for emergency stop is sent to the corresponding SS.

In the case of the transmission pattern example corresponding to the change rate abnormality detection shown in FIG. 5, the maximum difference value of the change rate (current value-previous value) in the reception measurement data is set in advance in the parameter ((A)
To (E)) in the parameter section 8. For example, on the reception data parameter side in the figure, “N
o. In “receive data 1” of “1”, “SS1” (slave station No. 1), “W3” (word 3), and the rate of change (= current value−previous value) in the received measurement data are When the maximum difference value (= (A)) of the previously stored change rate is exceeded (that is, when the present value−the previous value ≧ (A)), “transmission data 1” to “transmission data” on the transmission data parameter side are used. 3 "(transmission CHs 1 to 3) (here,
“SS2” (slave station No. 2) to “SS4” (slave station No. 2)
4) Send to).

Next, in the case of the transmission pattern corresponding to the closed loop shown in FIG. 6, for example, for “No.” and “1”, “SS” of “Reception data 2” (reception CH2) on the reception data parameter side
2 "(slave station No. 2)," W3 "(word 3)
The data of “(1)” previously stored in the parameter section 8 as parameters ((1) to (5)) is “SS1” (slave station No.) of “received data 1” (received CH1).
1), “SS5” (slave station No. 5) of “transmission data 2” (transmission CH2) on the transmission data parameter side according to the condition that “W2” (word 2) and “P3” (position 3) are turned on. , "W6" (word 6) and parameter "(1)", and at the same time, SS4 (slave station No. 4), W5 (word 5), P2 (position 2) of "transmission data 1" (transmission CH1) ) Is turned ON and transmitted to the slave station.

Further, in the case of the example of the polling order change pattern shown in FIG. 1, SS1 (slave station No. 1) of “reception position 1” on the reception data parameter side.
1), W2 (word 2), P3 (position 3) ON
And SS2 of the “receiving position 2” (slave station No.
2), W3 (word 3), P4 (position 4) ON
, The slave station polling order (1 → 2 → 3 → 4 →
5) is changed to the order of “polling order after change” (1 → 3 → 4
→ Change from 5 to 2).

The polling cycle change pattern (SS
In the case of “No. 1” in the case of “common polling cycle” 1, SS1 (slave station No. 1), W2 (word 2), P2 of “reception position 1” on the reception data parameter side
3 (Position 3) and SS2 of "Receive Position 2"
(Slave station No. 2), W3 (word 3) and P4 (position 4) are ON, and the rate of change of “received data 3” is greater than or equal to the previously stored maximum difference value “(A)”. In this case, the polling cycle common to all SSs is changed from “500 ms” as the “polling cycle before change” to “300 ms” as the “polling cycle after change”.

Finally, in the case of the polling cycle change pattern (SS individual polling cycle) 2 in FIG.
In the example shown in "1", SS1 (slave station No. 1), W2 (word 2) and P3 (position 3) of "reception position 1" on the reception data parameter side are ON, and
When the change rate of “received data 2” is equal to or greater than the previously stored maximum difference value “(A)”, “SS1” to “SS5”
As shown in FIG. 1 to slave station No. 1 5 are changed respectively. Specifically, SS1
In SS5 and SS5, "50 ms" is changed to "30 ms", in SS2 and SS3, no change is made, and in SS4, "50 ms" is changed to "40 ms".

As is apparent from the above detailed description, according to the remote monitoring control system and the communication control method thereof, the corresponding control output such as the emergency shutoff valve operation command is automatically transmitted to the corresponding slave station in accordance with the parameters. Due to the efficient transmission, it is possible to reduce the answer back transmission time and to provide a highly reliable device.

As is clear from the above detailed description, according to the remote monitoring control system and the communication control method therefor, further, the parameters can be arbitrarily changed by a loading tool such as a PC. In the case where the system uses a polling (calling) method from the master station apparatus to the slave station apparatus or a sequential search method calling the slave stations in a specific order, the polling order / period change By adding a device and changing the polling (search) order or polling cycle in accordance with the specificity of the position information to allow a closed loop between slave stations, communication control with high communication efficiency and high flexibility can be performed.

Although various examples have been given as the above control information, there are various other modes for controlling the slave station in addition to the above. (1) For example, change control of data capture from a device in a slave station (change in number or capture cycle). (2) Change control of data processing contents in the slave station (statistical processing, change of feature extraction mode, change of edit processing). (3) Control of how data is output from the slave station to the master station (change of data number, change of transmission cycle, etc.). (4) In the case of a closed loop, there is also an example of forming a global closed loop system including a parent station in addition to the closed loop between slave stations.

[0061]

According to the present invention, the master station determines whether or not to perform slave station control based on data and position information from the slave station, and sends control information to the slave station accordingly. I did it. As a result, communication efficiency as a system and communication control with high flexibility became possible.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall system configuration of a remote monitoring control system according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a transmission operation by cyclic transmission or HDLC transmission in a master station of the remote monitoring control system.

FIG. 3 is a flowchart illustrating a transmission operation by a polling method or a sequential search method in a master station of the remote monitoring control system.

FIG. 4 is a diagram showing an example of an emergency stop command transmission pattern in a master station of the remote monitoring control system.

FIG. 5 is a diagram showing an example of a transmission pattern corresponding to change rate abnormality detection in a master station of the remote monitoring control system.

FIG. 6 is a diagram showing an example of a closed loop applicable transmission pattern in a master station of the remote monitoring control system.

FIG. 7 is a diagram showing an example of a polling order change pattern in a master station of the remote monitoring control system.

FIG. 8 is a diagram showing an example of a polling cycle change pattern in a master station of the remote monitoring control system.

FIG. 9 is a diagram showing another example of the polling cycle change pattern in the master station of the remote monitoring control system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Master station apparatus 2 Computer 3 System bus 4 Upper system interface part 5 Monitoring control part 6 Transmission / reception part 7 Child station state identification processing part 8 Parameter part 9 Modem 10 Monitoring control console 12 Child station 13 Main unit, main board (device to be controlled) 15) NTT line 16 PC (personal computer) 17 Polling order / cycle changing device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kimio Nemoto 3-2-1 Sachimachi, Hitachi City, Ibaraki Prefecture Inside Hitachi Engineering Co., Ltd. (72) Inventor You Yo Takahashi 3--18, Omikamachi, Hitachi City, Ibaraki Prefecture No. 1 Ibaraki Hitachi Information Service Co., Ltd.

Claims (18)

[Claims] In a remote monitoring control system, a master station device and a plurality of slave station devices are connected by a transmission line, and the master station device monitors and controls a device connected to the slave station device. In, the state of the slave station is determined based on data or position information collected from the slave station device, and when control over the slave station device is required, control information on the slave station device and / or other slave station devices is determined. Is transmitted to the slave station device. 2. The slave station device receiving the control information controls data input from a device and / or data output control to a master station device based on the control information and / or data processing content in the slave station device. 2. The method according to claim 1, wherein the change control is performed.
Remote monitoring control method. 3. A remote monitoring control system in which a master station device and a plurality of slave station devices are connected by a transmission line, and the master station device monitors and controls a device connected to the slave station device. Then, the slave station state is determined based on the data or position information collected from the slave station apparatus, and when it is necessary to change the communication method in the slave station apparatus, the communication to be sent from the slave station apparatus to the master station apparatus is required. A remote monitoring control method for transmitting information indicating the method to the slave station device and / or another slave station device. 4. The remote monitoring control method according to claim 3, wherein the slave station device that has received the communication method transmits data to the master station device in accordance with the communication method. 5. A remote monitoring control system for connecting a master station device and a plurality of slave station devices via a transmission line, and monitoring and controlling a device connected to the slave station device from the master station device. Then, the slave station state is determined based on the parameter of interest of the position information collected from the slave station device, and when a control change or a communication method change to the slave station device is required, the slave station device and / or other A remote monitoring control method in which information indicating the fact is transmitted to the slave station device, and the slave station device changes the control or the communication method based on the information. 6. The remote monitoring control method according to claim 5, wherein the parameter of interest is at least one of specificity, importance, priority, and relevance of the position information. 7. The communication method according to claim 3, wherein a method of transmitting data such as polling, sequential search, CDT, HDLC, etc., an order of transmission, and a data format are defined.
4. A remote monitoring control method according to any one of 4 and 5. 8. The communication method according to claim 1, wherein the data transmission frequency includes:
8. The remote monitoring control method according to claim 7, wherein the method includes a period. 9. A remote monitoring control system for connecting a master station device and a plurality of slave station devices via a transmission line, and monitoring and controlling a device connected to the slave station device from the master station device. In the means for determining the state of the slave station based on data or position information collected from the slave station device,
A remote monitoring control system provided with means for sending control information to the slave station device or another slave station device when control is required for the slave station device. 10. A remote monitoring control system for connecting a master station device and a plurality of slave station devices via a transmission line, and monitoring and controlling a device connected to the slave station device from the master station device. In the means for determining the status of the slave station based on data or position information collected from the slave station device, if the slave station device requires a communication method, the information indicating the communication method, the corresponding slave station device or A remote monitoring control system provided with means for transmitting to another slave station device. 11. A remote monitoring control system that connects a master station device and a plurality of slave station devices via a transmission line, and monitors and controls a device connected to the slave station device from the master station device. Means for judging the status of the slave station based on the parameter of interest of the position information collected from the slave station device, and when a control change or communication method change to the slave station device is required, And / or a means for transmitting information to that effect to another slave station apparatus, and wherein the slave station apparatus is provided with means for changing control or communication method based on this information. 12. The remote monitoring control system according to claim 10, wherein the slave station device includes means for receiving the information indicating the communication method and transmitting data to the master station device according to the communication method. 13. The remote monitoring control method according to claim 11, wherein the parameter of interest is at least one of specificity, importance, priority, and relevance of the positioning information. 14. A remote monitoring control system for connecting a master station device and a plurality of slave station devices via a transmission line, and monitoring and controlling devices connected to the slave station device from the master station device. In the specificity of the position information collected from the slave station device, importance, priority, judge the slave station state based on at least one of the relevance, and requires responsiveness in a certain slave station device A remote monitoring control method, comprising: a slave station state identification processing unit that automatically sends an emergency command to the slave station device when an abnormality is detected. 15. The master station device further includes a parameter unit for registering the specificity, importance, priority, and relevance of the position information as parameters to the slave station state identification processing unit. 15. The remote monitoring control system according to claim 14, wherein the remote monitoring control system is provided. 16. The remote monitoring control system according to claim 15, wherein the content of the parameter section of the master station device can be arbitrarily changed from outside. 17. The slave station device further performs the master station device based on at least one of specificity, importance, priority, and relevance of position information from the slave station device. 15. The remote monitoring control system according to claim 14, further comprising: a polling order / cycle changing device for changing the order or cycle of polling or search for calling the plurality of slave stations from the master station according to the determination of the slave station status. 18. The remote monitoring control system according to claim 14, wherein a closed loop is formed between the slave station devices including the transmission destination of the emergency command.