JP4884350B2 - Supervisory control system - Google Patents

Description

  The present invention relates to a monitoring control system for monitoring and controlling a plant or the like, and in particular, a terminal monitoring control device that monitors a change in the state of a plurality of facilities to be monitored and controlled, and a terminal monitoring control device via a communication line And a server that collects a state change from the monitoring control target and presents it to the operator and outputs a control signal to the monitoring control target via the terminal monitoring control device. The monitoring control system which performs transmission / reception of the state change signal and control signal performed between a server and a server using a predetermined communication object, and a character transmission / reception method thereof.

  In general, a monitoring control system for monitoring and controlling a plant or the like is composed of one or a plurality of servers and one or a plurality of end monitoring control devices. Terminal monitoring and control devices are installed in certain units that are subject to monitoring and control, and DI (digital input: equipment on / off status and alarm generation status) from monitoring and control targets. Input) and AI (analog input: input of numerical values such as measured values) are monitored and transmitted to the server via the communication line. Also receives and monitors DO (digital output: mainly ON / OFF two-state output such as device open / close control) and AO (analog output: output of numerical values such as set values) signals from the server. Performs control output for the controlled object. The server collects DI / AI from the monitoring control target via a plurality of terminal monitoring control devices and presents it to the operator, and also passes through the terminal monitoring control device according to the operation of the operator and the internal automatic logic sequence. Then, control by DO / AO is performed on the monitoring control target. Communication between the server and the terminal monitoring control device is performed using a general purpose or dedicated protocol capable of transmitting / receiving DI / DO / AI / AO.

  In the conventional supervisory control system, when information such as DI is input from the supervisory control target to the terminal supervisory control device, the DI is sent to the server as an event, and the character is based on the conversion table set in advance on the server. It was converted into a column and presented to the operator (for example, see Patent Document 1).

JP 09-016249 A

  However, since the conventional monitoring control system converts input data into a character string based on a conversion table registered in advance, an arbitrary character string not registered in the conversion table is converted into a server and a terminal monitoring control device. There was a problem that it was not possible to send and receive between them.

  Alternatively, when an attempt is made to implement a function for transmitting and receiving an arbitrary character string between a server and a terminal monitoring control device in a conventional monitoring control system, restrictions on H / W (hardware) of the terminal monitoring control device There was a problem that it could not be implemented due to a small memory capacity or no file system. Alternatively, there is a problem that costs are required when mounting by solving the limitation of H / W.

  The present invention has been made to solve the above-mentioned problem, and only communication objects of DI / DO or AI / AO used in existing protocols are used in communication between the server and the terminal monitoring control device. Monitoring control that can display any character (any character string not registered in advance) entered by the operator on the server on the display device of the terminal monitoring controller without increasing the cost. It is an object to obtain a system and a method for transmitting and receiving characters thereof.

  In order to solve the above-described problems and achieve the object, a monitoring control system according to the present invention includes a terminal monitoring control device that monitors a change in state of a plurality of facilities to be monitored and controlled, and a terminal monitoring control device via a communication line. And a server that collects a state change from the monitoring control target, presents it to the operator, and outputs a control signal to the monitoring control target via the terminal monitoring control device. In a monitoring control system that uses a communication object consisting of a number and a signal value determined for each facility to send and receive state change signals and control signals performed between and Character information is placed in association with the input device and a number to which no facility in the communication map is assigned, and the input character information is stored in the communication object. And over data processing unit, characterized by comprising a communication unit for transmitting the communication object to end the monitoring control unit.

  Further, the character transmission / reception method of the monitoring control system of the present invention includes a terminal monitoring control device that monitors a change in the state of a plurality of equipment to be monitored and controlled, and a terminal monitoring control device that is connected to the terminal monitoring control device via a communication line. A state change that is collected between the terminal monitoring control device and the server, and includes a server that outputs a control signal to the monitoring control target via the terminal monitoring control device. A method for transmitting and receiving characters in a monitoring control system that performs transmission and reception of signals and control signals using a communication object consisting of a number and a signal value determined for each facility, and at least an input device for inputting characters to a server is provided. By using a communication object and using a number that is not assigned a facility in the communication map, the entered characters are sent from the server to the terminal monitoring controller. Characterized in that it.

  According to the supervisory control system and the character transmission / reception method of the present invention, the supervisory control system can be realized using only the communication object that is an existing protocol that is always used, and between the server and the terminal supervisory control device. There is an effect that the function of transmitting / receiving an arbitrary character string and displaying it can be realized at low cost by using an existing communication protocol.

  Embodiments of a monitoring control system according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is an overall configuration diagram of a monitoring control system according to the present invention. The supervisory control system 11 communicates with the terminal supervisory control device 13 for inputting / outputting data to / from the supervisory control target, and monitors and controls the supervisory control target (not shown) and data with the operator. It comprises a server 12 that performs input / output and a communication line 14 that connects them.

  The server 12 is received by the input device 121 that receives input from the operator, the display device 122 that displays data on the screen and presents it to the operator, the communication unit 123 that performs data transmission and reception with the terminal monitoring control device 13, and the communication unit 123 A data processing unit 124 that processes data and data input from the input device 121 and a storage unit 125 that stores various types of data are included.

  On the other hand, the terminal monitoring control device 13 displays the data on the screen and presents it to the operator, the communication unit 131 that communicates with the server 12, the data received from the server 12 and the data input from the monitoring target device. A data processing unit 133 for processing, a storage unit 134 for storing various data, and a monitoring control input / output unit 135 for performing data input from the monitoring control target and control output to the monitoring control target.

  FIG. 2 is a diagram showing a structure of a general communication map database and an example of communication map data in the monitoring control system having the above configuration. The communication map data includes “equipment” 22 indicating a device to be monitored input or control output in the monitoring control target, or a virtual device used in the internal logic processing of the server / terminal monitoring control device, and this communication. The DI / DO number 21 is an index number that uniquely represents each data row in the map data.

  FIG. 3 is a diagram showing a format of a general DI / DO communication object in the monitoring control system having the above configuration. The format of the DI / DO communication object is composed of a DI / DO number 31 to be transmitted / received and a “DI / DO value” 32 for storing the equipment state corresponding to the DI / DO number as a value of 1 or 0. . For example, when the target equipment is a switch, “DI / DO value = 0” is set when the switch state is “open”, and “DI / DO value = 1” is set when the switch state is “closed”. The correspondence between the DI / DO value and the state of the target equipment is uniquely determined in advance for each equipment in the system.

  FIG. 4 is a diagram showing a structure of the DI / DO communication map database and an example of communication map data in the monitoring control system of the present embodiment. The data item of the DI / DO communication map data in the present embodiment includes characters used for character string transmission in addition to the DI / DO number 41 (similar to the DI / DO number 21) and the equipment 42 (similar to the equipment 22). The “character” 43 to be expressed is included.

  In the example of the DI / DO communication map data of FIG. 4, in addition to normal DI / DO data (DI / DO number = 1 to n) used for the open / closed state of the switch to be monitored and controlled, character string transmission / reception Data (DI / DO number = n + 1 to n + 26) are set.

  Next, the operation will be described. Here, first, an operation in the case of performing normal device control will be described, and then an operation for displaying an arbitrary character string, which is a feature of the present embodiment, will be described. When performing normal device control, an operator first inputs a device to be controlled and a control direction with the input device 121 of the server 12. The data processing unit 124 of the server 12 searches the DI / DO communication map database for communication map data having equipment that matches the input device to be controlled, acquires the corresponding DI / DO number, and performs DI / DO communication. The object is set in the DI / DO number field, and the designated control direction is set in the DI / DO value field. The communication unit 123 of the server 12 transmits this DI / DO communication object to the terminal monitoring control device 13.

  The communication unit 131 of the terminal monitoring control device 13 receives this DI / DO communication object, and the data processing unit of the terminal monitoring control device 13 matches the DI / DO number set in the DI / DO communication object. By searching the communication map data having the DI / DO number from the DI / DO communication map database and acquiring the corresponding equipment, the control target device is specified, and the DI of the DI / DO communication object is specified for this control target device. Control output in the direction indicated by the / DO value.

  For example, when the operator inputs a control “switch 2 is closed (1)”, the DI / DO number “DI / DO number = 2, DI / DO value = 1” is sent from the server 12 to the terminal monitoring control device 13. The terminal communication control device 13 outputs the closing direction corresponding to “DI / DO value = 1” to the switch 2 which is the facility corresponding to “DI / DO number = 2”. .

  Next, as a feature of the present embodiment, an operation when an arbitrary character string input by the operator using the input device 121 of the server 12 is displayed on the display device 132 of the terminal monitoring control device 13 will be described. First, the operator uses the input device 121 of the server 12 to input an arbitrary character string to be displayed on the display device 132 of the terminal monitoring control device 13.

  The data processing unit 124 of the server 12 extracts the first character of the input character string, searches the DI / DO communication map database for communication map data in which a character matching the extracted character is set, and responds. The DI / DO number is acquired and set in the DI / DO number column of the DI / DO communication object. The communication unit 123 of the server 12 transmits this DI / DO communication object to the terminal monitoring control device 13. Subsequently, when the second character is input, the same processing as the first character is performed. In this way, the same processing is performed for each character after the second character.

  For example, when the character string input by the operator is “ABC”, the first character “A” is searched from the communication map data to obtain “DI / DO number = n + 1”, and “DI / DO number = The communication object for DI / DO of “n + 1, DI / DO value = 1” is transmitted to the terminal monitoring control device 13. Here, “DI / DO value = 1” is used, but in the case of character string transmission, the value of the DI / DO value is meaningless (it is not used by the terminal monitoring control device 13 on the receiving side) and is unnecessary. However, in order to match the format with the normal control message, it is included as dummy data. Subsequently, the second character and the third character are processed in the same manner, and three DI / DO communication objects are transmitted from the server 12 to the terminal monitoring control device 13 as shown in FIG.

  On the other hand, in the terminal monitoring control device 13, the communication unit 131 receives the DI / DO communication object transmitted from the server 12. The data processing unit of the terminal monitoring control device 13 first refers to the DI / DO number of the first DI / DO communication object among the received DI / DO communication objects, and matches the DI / DO number. The communication map data having the / DO number is searched from the communication map database. When the equipment is set in the equipment field of the retrieved communication map data and the character field is not set, the data processing unit assumes that this DI / DO communication object is a communication object for normal device control. The communication map data having the DI / DO number that matches the DI / DO number set in the DI / DO communication object is converted into DI / DO as in the case of the description of the operation in the case of normal device control described above. The control target device is specified by searching the DO communication map database and acquiring the corresponding equipment, and the control output in the direction indicated by the DI / DO value of the DI / DO communication object is performed on this device. On the other hand, if no equipment is set in the equipment field of the retrieved communication map data and characters are set in the text field, it is determined that this DI / DO communication object is a communication object for character string transmission. The character is acquired from the character column of the communication map data, and the character is displayed on the display device 132. Subsequently, by performing the same processing for the second and subsequent DI / DO communication objects, a series of character strings input by the operator on the server 12 side is displayed on the display device 132 on the terminal monitoring control device 13 side. The

  As described above, by transmitting a character string using an existing DI / DO communication object, an arbitrary character string input by the operator to the input device 121 of the server 12 can be changed without changing the existing communication protocol. Can be displayed on the display device 132 of the terminal monitoring control device 13.

Embodiment 2. FIG.
FIG. 6 is a diagram showing an AI / AO communication map database structure and an example of AI / AO communication map data in the monitoring control system according to the second embodiment of the present invention. The data item of the AI / AO communication map data in the present embodiment includes an AI / AO number 61 and equipment 62. The structure of this communication map database is the same as the structure of the AI / AO communication map database of a general supervisory control system.

  In the example of the communication map data in FIG. 6, in addition to normal AI / AO data (AI / AO number = 1 to n) such as current and voltage to be monitored and controlled, data for character string transmission / reception (AI) / AO number = n + 1) is set.

  FIG. 7 shows the format of an AI / AO communication object. The format of the AI / AO communication object includes an AI / AO number 71 to be transmitted / received and an “AI / AO value” 72 that stores an analog value corresponding to the AI / AO number as a numerical value. The correspondence between the AI / AO value and the target analog value is uniquely determined in advance for each analog value in the system.

  FIG. 8 shows a character code table. As shown in FIG. 8, the character code table includes a character 81 and a code 82 that is a number that uniquely represents the character in the character code table.

  Next, the operation will be described. Here, first, an operation in the case of performing normal analog value control will be described, and then an operation of displaying an arbitrary character string, which is a feature of the present embodiment, will be described. When performing normal analog value control, the operator first inputs the control target analog value and the control target value with the input device 121 of the server 12. The data processing unit 124 of the server 12 searches the AI / AO communication map database for communication map data having equipment that matches the input analog value to be controlled, acquires the corresponding AI / AO number, and uses the AI / AO The communication target is set in the AI / AO number field, and the designated control target value is set in the AI / AO value field. The communication unit 123 of the server 12 transmits the AI / AO communication object to the terminal monitoring control device 13.

  The communication unit 131 of the end monitoring control apparatus 13 receives this AI / AO communication object, and the data processing unit 133 of the end monitoring control apparatus 13 receives the AI / AO number set in this AI / AO communication object. The control target analog value is specified by searching the communication map data having the matching AI / AO number from the AI / AO communication map database and acquiring the corresponding equipment, and AI / AO communication is performed for this control target analog value. The analog value control output of the value indicated by the AI / AO value of the object is performed.

  For example, when the operator inputs analog value control “set the set value X to 200”, the AI / AO “AI / AO number = 2, AI / AO value = 200” is sent from the server 12 to the terminal monitoring control device 13. The communication object is transmitted, and the terminal monitoring control device 13 outputs the set value X, which is equipment corresponding to “AI / AO number = 2”, to 200.

  Next, an operation when an arbitrary character string input by the operator using the input device 121 of the server 12 is displayed on the display device 132 of the terminal monitoring control device 13 will be described. The operator uses the input device 121 of the server 12 to input an arbitrary character string to be displayed on the display device 132 of the terminal monitoring control device 13.

  The data processing unit 124 of the server 12 acquires an AI / AO number for character string transmission. Here, since there is only one map data for character string transmission in the AI / AO communication map database, the data processing unit 124 is referred to as “character string” when acquiring the AI / AO number for character string transmission. The AI / AO communication map database may be searched by the equipment name, or a value “n + 1” may be stored in advance as a system constant for the character transmission AI / AO number.

  The data processing unit 124 extracts the first character of the input character string, searches the character code table for a character that matches the extracted character, obtains the corresponding code, and performs AI / AO communication object AI / Set in the AO value field. Further, the previous AI / AO number for character string transmission is set in the AI / AO number column of this AI / AO communication object. The communication unit 123 of the server 12 transmits the AI / AO communication object to the terminal monitoring control device 13. Subsequently, the same processing is performed for each second character after the second character of the input character string.

  For example, when the character string input by the operator is “ABC”, the first character “A” is searched from the character code table to obtain “code = 65”, and “AI / AO number = n + 1”. An AI / AO communication object with “AI / AO value = 65” is transmitted to the terminal monitoring control device 13. Subsequently, the second character and the third character are processed in the same way, and three AI / AO communication objects are transmitted from the server 12 to the terminal monitoring control device 13 as shown in FIG.

  On the other hand, in the terminal monitoring control apparatus 13, the communication unit 131 receives the AI / AO communication object transmitted from the server 12. First, the data processing unit 133 of the terminal monitoring control device 13 refers to the AI / AO number of the first AI / AO communication object among the received AI / AO communication objects.

  If the AI / AO number is not an AI / AO number for character string transmission, it is determined that this AI / AO communication object is a communication object for normal analog value control, and the normal analog value control described above is performed. As in the case of the operation description, the communication map data having the AI / AO number that matches the AI / AO number set in the AI / AO communication object is searched from the communication map database to obtain the corresponding equipment. The control target analog value is specified by this, and the analog value control output of the value indicated by the AI / AO value of the AI / AO communication object is performed on the control target analog value.

  On the other hand, if the AI / AO number is an AI / AO number for character string transmission, it is determined that this AI / AO communication object is a communication object for character string transmission, and this AI / AO communication object The data having the same value as the value set in the AI / AO value field is searched from the character code table to obtain the corresponding character, and the character is displayed on the display device 132. Subsequently, by performing the same processing for the second and subsequent AI / AO communication objects, a series of character strings input by the operator on the server 12 side is displayed on the display device 132 on the terminal monitoring control device 13 side. The

  As described above, by transmitting a character string using an existing communication object for AI / AO, an arbitrary character string input by the operator to the input device 121 of the server 12 can be changed without changing the existing communication protocol. Can be displayed on the display device 132 of the terminal monitoring control device 13.

Embodiment 3 FIG.
In the first and second embodiments described above, the operation when the character string input on the server 12 side is displayed on the display device 132 of the terminal monitoring control device 13 has been described. When provided, the operator can input an arbitrary character string on the terminal monitoring control device 13 side and display the character string on the server 12 side by the same processing as in the first embodiment.

  As described above, the monitoring control system according to the present invention is useful when applied to a monitoring control system for monitoring and controlling a plant or the like.

1 is an overall configuration diagram of a monitoring control system according to a first embodiment of the present invention. It is a figure which shows the structure of the general communication map database of the monitoring control system of Embodiment 1 of this invention, and the example of communication map data. It is a figure which shows the format of the object for general DI / DO communication of the monitoring control system of Embodiment 1 of this invention. It is a figure which shows the structure of the DI / DO communication map database of the monitoring control system of Embodiment 1 of this invention, and the example of communication map data. It is a figure which shows the example of the communication object for DI / DO in the case of displaying character string "ABC." It is a figure which shows the structure of the AI / AO communication map database of the monitoring control system of Embodiment 2 of this invention, and the example of AI / AO communication map data. It is a figure which shows the format of the object for general AI / AO communication of the monitoring control system of Embodiment 2 of this invention. It is a figure which shows a character code table. It is a figure which shows the example of the communication object for AI / AO in the case of displaying character string "ABC".

Explanation of symbols

11 Monitoring control system 12 Server 13 Terminal monitoring control device 14 Communication line 15 Monitoring control target 21, 31, 41 DI / DO number 22, 42, 62 Equipment 32 DI / DO value 43, 81 Character 61, 71 AI / AO number 72 AI / AO value 82 Code 121 Server input device 122 Server display device 123 Server communication unit 124 Server data processing unit 125 Server storage unit 131 Terminal monitoring control device communication unit 132 Terminal monitoring control device display device 133 Terminal Data processing unit of monitoring control device 134 Storage unit of terminal monitoring control device 135 Monitoring control input / output unit of terminal monitoring control device

Claims (5)

A terminal monitoring control device that is connected to a plurality of facilities as monitoring control targets and monitors state changes of the monitoring control targets ;
It is through a communication line connected to the terminal monitoring control device, wherein while presenting to the operator collects a change in the state of monitoring the controlled plant, control signal to the supervisory control via the terminal monitoring control device And a server for outputting
Transmission / reception of the state change signal and the control signal performed between the terminal monitoring control device and the server, a first area storing a number determined for each monitoring control target , and the state change signal or the In a monitoring and control system that uses a communication object including a second area that stores a control signal ,
Provided at least the server-side, an input device for inputting characters,
Provided in both the server and the terminal monitoring control device, when the character information input by the input device is transmitted and received between the server and the terminal monitoring control device, the monitoring control target is not assigned A data processing unit that performs a process of storing character information managed in association with a number in either the first area or the second area of the communication object ;
A communication unit for transmitting the communication object to the terminal monitoring control device;
A supervisory control system characterized by comprising: The communication object is a digital communication object in which a number for identifying the monitoring control target is stored in the first area, and an on / off two-state signal value is stored in the second area .
The data processing unit uses the digital communication object for character transmission by storing in the first area a number representing a character to be transmitted and received instead of the number assigned to the monitoring control target. The monitoring control system according to claim 1. 3. The number after n + 1 associated with characters to be transmitted and received is stored in the first area when the number assigned to the monitoring control target is 1 to n. The monitoring and control system described. The communication object is an analog communication object in which a number for identifying the monitoring control target is stored in the first area, and an analog value representing a state is stored in the second area .
In place of the number assigned to the monitoring control target , the data processing unit stores, in the first area, a number meaning that characters are transmitted and received, and a character code representing the characters to be transmitted and received The supervisory control system according to claim 1 , wherein the analog communication object is used for character transmission by storing in the second area . The monitoring control system according to any one of claims 1 to 4, wherein the input device is also provided on the terminal monitoring control device side.

Images