JP2002095068A - Monitoring control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide versatile communication function by separating a control function and the communication function of a controller. SOLUTION: A monitoring control system comprises a central supervisory chamber side unit 1, having a supervisory monitoring unit 16 with a display unit for providing necessary information for an operator, and field side units disposed dispersively at remote positions via a communication channel network 3. The field side unit is a monitor control system, having communication equipment 10, 10a for communicating data to each other, controllers 15, 15a which have predetermined control functions, communication equipment control function means 11, 11a for controlling communication equipment 14, 14a, and a controller communication unit 20 for mounting data supervisory communication control function means 12, 12a for controlling and supervising these communication equipment control function means and controller communication function means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to plant equipment such as water supply equipment in which equipment is distributed over a wide area, and mutually transmits and receives data between a central monitoring and control device or a central controller and a field controller. It relates to a supervisory control system.

[0002]

2. Description of the Related Art Conventionally, when data is transmitted and received between a central monitoring and control device or a central controller and a controller installed at a remote location, the controller itself has a communication function for sending and receiving data and retrying, and has a fixed function. A method of transmitting and receiving data based on a cycle or a request from a partner is adopted. That is, in many cases, the controller itself integrates the communication function and the control function integrally, and the various functions are often left to the development and technical capabilities unique to the manufacturer.

[0003]

Therefore, in the above-described monitoring and control system, controllers are installed in various plant facilities, but it is difficult to add a new communication function to the existing controllers. Even if added, it is often very difficult. Even when a controller is installed in new plant equipment, it is necessary to allocate more communication functions to the controller's original resources that control the required equipment. It is often accompanied.

Further, since this type of controller is made by integrating various functions without separating the communication function and the control function, the communication function is generally developed for each controller. Development man-hours increase. In addition, since the time is different for each controller, it is difficult to reproduce the data of the central side and the remote site, as one time series.

In the conventional remote monitoring and control system,
There is no means to uniformly set the time for the entire plant such as a plant located at a remote location, and therefore, the remote plant cannot add accurate time data to the data collected at the remote plant. . As a result, the communication control device of the central control room uses the time at that time approximately as the data collection time when data arrives from the remote station side, but when the station is located in a remote place, There is a time difference between the time at which the data was actually collected and the time at which the data arrived at the central control room, causing a problem in analyzing the data.

The present invention has been made in view of the above circumstances, and aims to provide a monitoring and control system which can be easily used for an existing controller by generalizing a communication function, and which contributes to improvement of development efficiency. is there.

Another object of the present invention is to provide a monitoring and control system for easily and accurately adjusting the time of data collected from each controller and reproducing time-series data.

[0008]

In order to solve the above-mentioned problems, a monitoring and control system according to the present invention is provided so as to be remote from a central control room side device having a management and monitoring device with a display device for providing necessary information to an operator. A site device distributed on the ground is connected via a communication network, and the central control room side device and the site device exchange data with each other via the communication network. A communication device, a controller having a required control function, a communication device control function unit for controlling the communication device, a controller communication function unit for performing read / write processing of an internal register of the controller, and the communication device control function unit And a data management communication control function means for controlling and managing the controller communication function means, wherein the communication device control function means and the data The management communication control function means and the controller communication function means are mounted in a single unit, and each function means in the single unit is provided with an instruction from the management and monitoring device or a communication function of the controller under a predetermined cycle. This is a configuration in which a role is provided as a controller communication unit acting as a proxy.

According to the present invention having the above-described configuration, the data handled by each controller is periodically or arbitrarily collected by each functional means in the controller communication unit and stored in the register of the controller. In addition, the controller itself can perform its original control function, and by making the controller communication unit versatile, it can be easily used for the existing controller, and the development efficiency can be improved.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

(One Embodiment of Monitoring and Control System) FIG.
1 is a configuration diagram showing one embodiment of a monitoring and control system according to the present invention.

This monitoring and control system comprises a central control room-side device 1 and remote site-side devices (site-side devices) 2 at remote locations.
, a, 2b,... are connected via the communication network 3.

The central control room side device 1 is connected to a communication network 3 and communicates with the outside and the central control side device 1-remote station side devices 2a, 2b,... A communication device control function unit 11 for performing control;
A data management communication control function unit 12 having functions such as unauthorized access processing, data format analysis, and data validity check, for transmitting the system time of the central control room-side device 1 based on the time synchronization cycle, Time synchronization function unit 13 for checking the delay time, controller communication function unit 14, central controller 15, central monitoring and control device 1
6 and a central monitoring and display device 17 are provided. The controller communication function unit 14 has a function of performing read / write processing of an internal register of the controller 15. The data management communication control function unit 12 has a communication device control function unit 11 and a controller communication function in addition to the above functions. The unit 14 has a function of performing various controls and managements.

On the other hand, remote station side devices 2a, 2b,.
The communication device 10a,
Communication equipment control function unit 1 for controlling this communication equipment 10a
1a, a data management communication control function unit 12a, a time synchronization function unit 13a, a controller communication function unit 14a, and a site controller 15a.

(Embodiment Corresponding to Claim 1) In the monitoring control system as described above, the communication equipment control function unit 11, the data management communication control function unit among the constituent elements of the central control room side device 1 With the configuration in which the controller 12 and the controller communication function unit 14 are mounted in the same unit, this unit plays a role of a controller communication unit function that substitutes for the communication function of the controller 15.

On the other hand, the remote station side devices 2a, 2b,.
And the communication device control function unit 11a,
The data management communication control function unit 12a and the controller communication function unit 14a are configured to be mounted on the same unit, and this unit plays the role of a controller communication unit function that substitutes for the communication function of the controller 15a.

That is, both the central control room-side device 1 and the remote local station-side devices 2a and 2b use general communication devices 10 and 1 as well.
0a and the controllers 15 and 15a, the communication device control function units 11 and 11a, the data management communication control function unit 1
2, 12a and a controller communication unit function including the controller communication function units 14 and 14a are interposed to separate the controller control function from the communication function and set an environment in which the controller can execute its original function independently. Is what you do.

For example, when the data management / communication control function unit 12a of the central control room side device 1 transfers the data request of the controller 15a at regular intervals or based on a request from the monitoring management device 16, the communication device of the remote local station side device 2a 10
a receives the data from the central control room side device 1 and passes it to the data management communication control function unit 12a via the communication device control function unit 11a. This data management communication control function unit 12a
Determines whether the request is an access request to the site controller 15a, and when the request is determined, instructs the controller communication function unit 14a to execute processing of an internal register of the site controller 15a. The data of this processing result is transmitted to the central control room side device 1 via the reverse order to the above, and the communication device 10-the communication device control function unit 11, the data management communication control function unit 12, and the controller communication function unit 14 and stored in an internal register of the central controller 15 by the controller communication function unit 14.

Therefore, as the central controller 15,
The data of the site-side controller collected by the controller communication unit function as described above is
Or by sending the data to the display device 17, these devices 16, 1
In 7, the status of plant equipment and processes can be monitored.

FIG. 2 is a conceptual diagram for explaining the above-mentioned respective functional units in an easily understandable manner.

In the internal register of the central controller 15, an area for storing the controller information of the remote station side devices 2a, 2b,..., That is, the central controller transmission areas 15A11, 15B11,. By making an access request from the data management communication control function unit 12 every time, the collected data of the station controller 15a can be mapped to the central controller transmission area 15A11 under the communication device control function unit 11 and the controller communication function unit 14. Can,
The original function of the central controller 15 can be executed. The same applies to each of the remote station side devices 2a, 2b,. Therefore, the communication and data processing functions can store required data in the central controller transmission areas 15A11, 15B11,.

FIG. 3 is a diagram in which, for example, the configuration of the central control room side device 1 in the configuration shown in FIG.

That is, the controller communication unit 20 including the communication device control function unit 11, the data management communication control function unit 12, and the controller communication function unit 14 is constituted by a box-shaped unit or module board as independent hardware, Similarly to the controller communication unit 20, the independent communication device 10 and the controllers 15, 15 'are connected to connection cables 20a, 20b, respectively.
Connected by That is, the controller communication unit 20 has an interface with the communication device 10, has an interface function of the controller 15 of the backplane bus (not shown), and is newly connected to the controller 15 via the connection cable 20c. A simple controller 15 'can be added. These controller communication unit 20, communication device 10, controller 1
5, 15 'communicate with a predetermined protocol.

Incidentally, the connection cable 20c is for performing a digital chain connection with a plurality of controllers 15, 15 ', and can communicate with the plurality of controllers 15, 15'.

(Embodiment Corresponding to Claim 2) FIG. 4 is a configuration diagram showing another embodiment of the monitoring control system according to the present invention.

The monitoring and control system includes a controller protocol unit 30 which implements a plurality of controller protocols 30A, 30B and 30C in the controller communication unit 20 or in a single controller communication function unit 14, among the components shown in FIG. Since the protocol to be used is different for each system, a protocol selection unit 32 for selecting any one protocol based on an externally designated input and a protocol selected by the selection unit 32 A controller protocol conversion unit 32 to be set is provided. 12a is a data management communication control communication path, and 32A is a controller connection unit.

In the above system, data necessary for communication with the controller among the data via the data management communication control communication path 12aa is directly transmitted to the controller protocol conversion section 32 without passing through the controller protocol section 30. Sent to The data subjected to the protocol conversion by the conversion unit 32 is transmitted to the controllers 15, 15 '.
Are transmitted to the controllers 15 and 15 'via the controller connection unit 32A and the connection cables 20b and 20c.

When data communication is performed from the controllers 15 and 15 ', the reverse routine is followed.
It is possible to realize a similar function.

Therefore, even when the transmission formats of the controllers are different, the different transmission formats can be absorbed in the controller communication function unit 14 or the controller communication unit 20 having a plurality of protocols. , 12 without affecting the system.

(Embodiment Corresponding to Claim 3) FIGS. 5 to 7 are diagrams for explaining another embodiment of the monitoring control system according to the present invention.

In this supervisory control system, the data is transmitted to the controller 15 and the controller connection unit 32A in a data format 40 as shown in FIG. In such a transmission format, the controller 15 can interpret the command, and also corresponds to a data format when the controller 15 communicates with the outside.

This controller data format 4
0 is composed of several elements. Specifically, a start mark 40a indicating the beginning of data, a command word 4
0b, an address 40c, a size field 40d indicating a data amount (size), actual data 40e, redundant data 40f for error correction, and an end mark 40g indicating the end of the data.

FIG. 6 is a view for explaining the data arrangement of the controller register management table 45 set for the data management communication control function unit 12 in the central control room-side apparatus 1.

This controller register management table 4
Reference numeral 5 denotes a control performed on the controllers of all the stations (including the center itself) managed by the central control room side apparatus 1. Before writing the actual data received from the device, the validity of the data is checked.

The controller register management table 45 includes a machine name column 46, a station number 47 assigned to a controller managed in the machine, and register definitions for indicating the register range and type mapped to each controller. Column 48, the controller transmission area 15A1 of the central controller 15 for the register
Attribute items such as an access attribute definition field 49 for defining an access attribute to 1, 15B11 are provided, and are set when the system is constructed.

The register definition column 48 includes a register start address definition column 48A, a register end address definition column 48B, and a size definition column 48C indicating the total size. “R” in the access attribute definition column 49 is a flag indicating that reading of the central controller transmission area is permitted, W is writing permitted, and I is a flag indicating that access is completely prohibited.

Therefore, in this system, when data is transmitted in the data format 40 from the remote site-side devices 2a and 2b to the central control room-side device 1, the data, that is, the corresponding central data is transmitted from the data format 40. It is possible to check a register name, a size, and the like corresponding to the controller transmission area before actually writing the data in the controller 15. The controller data format 40 from the remote local device has an error, and by writing data to a portion of the internal register of the central controller 15 other than the transmission area, the controller 15 can be prevented from going down. .

FIG. 7 is a diagram showing an example of processing in which the data management communication control function unit 12 uses the data in the controller register management table 45 to prevent unauthorized access.

That is, the data management communication control function unit 12
Starts, after receiving data in the format of the controller data format 40 (S1), it analyzes the data format and checks the type, size, etc. (S1).
2) At the same time as calling the unauthorized access routine (S
3) Pass the analysis result. In the unauthorized access routine S3, the received data format analysis result and the contents of the controller register management table 45 are checked (S4).

Although the station name and station number are not included in the data format, the data management communication control function unit of the central control room side device 1 that has issued the request indicates which controller of which station is the data. 12 itself can be recognized.

Then, when it is determined as a result of the above check that the data is normal, the controller communication function unit 14 is accessed (S5), the register is accessed to the controller 15, and data is written (S6). If it is not normal, the process proceeds to the error processing routine and performs error processing (S7), thereby preventing access to the register.

(Another Embodiment of Monitoring and Control System) FIG.
FIG. 3 is a configuration diagram showing another embodiment of the monitoring control system according to the present invention.

The central control room-side device 1 is provided with a data management communication control computer 51, a modem 52, a programmable controller 53, and a central monitoring control device 55 having a central monitoring display device 54. Note that the central monitoring and control device 55 corresponds to the monitoring and management device 16 shown in FIG.

The data management communication control computer 51 and the modem 52 are connected by RS232C or the like, the data management communication control computer 51 and the programmable controller 53 are connected by RS232C or RS485 or the like. The device 55 is connected by Ethernet or S232C, RS485 or the like.

The data management communication control computer 51 has a setting file 56 and has a function of executing a communication device control process 57, a data management communication control process 58, and a controller communication process 59. That is, the communication device control process 57 and the controller communication process 59 perform communication between the modem 52 and the programmable controller 53 in response to a request from the data management communication control process 58, respectively. The communication device control process 57, the data management communication control process 58, and the controller communication process 59 have functions corresponding to the communication device control function unit 11, the data management communication control function unit 12, and the controller communication function unit 14, respectively, shown in FIG. I have.

On the other hand, the station-side devices 2a, 2b,... Are respectively data management communication control computers 61a, 61b, modems 62a, 62b, and a programmable controller 63.
a and 63b are provided.

This data management communication control computer, for example, 61
a has a setting file 66a and has a function of executing a communication device control process 67a, a data management communication control process 68a, and a controller communication process 69a. That is, the communication device control process 67a and the controller communication process 69a respond to the request from the data management communication control process 68a, respectively.
a, Communication is performed between the programmable controllers 63a. The connection of each component is the same as in the central control room side device 1.

(Embodiment Corresponding to Claim 4) In this monitoring control system, for convenience of explanation, only the central control room side device 1 and the plant A side device 2a are configured, and the plant side device 2a is programmable. An example in which the contents of the register of the controller 63a are transferred to the central monitoring and control device 55 of the central control room side device 1 will be considered.

The setting file 56 of the data management communication control computer 51 on the central side contains the conditions for executing the transfer of the contents of the registers of the programmable controller 63a on the station side and the conditions for connecting to the modem 62a on the station side. A telephone number and a command to be transmitted to the data management communication control computer 61a on the station side are set.

The programmable controller 63 on the machine side
An example of the setting file 56 for transferring data of 32 words from the register a to the central monitoring controller 55 will be described as follows.

<Condition setting file> Monitoring cycle: 600000 Execution condition: (A01DRRW0010) Connection destination: PLC-A (programmable controller) Transfer command: (A01DRRW002, 32) Result command: (A01DRWRW002, [ ^* ]) <Phone number setting File> PLC-A: xxx · xxx-xxx This example shows a case where the 0 bit of the RW001 word of the register of the programmable controller (hereinafter, collectively referred to as a controller) 53 is 1 as an execution condition. The execution condition describes an instruction for reading this bit from the controller. The data management communication control process 58 on the central side transmits an instruction of the execution condition to the controller communication process 59. Controller communication process 5
9 receives the command, immediately transmits the command to the controller 53, receives the command execution result by the controller 53, and returns it to the data management communication control process 58. The instruction execution result contains the value of 0 bit of the RW001 word of the register of the controller 53. When this value is 1, a request is made to transmit a condition setting file transfer command to the local controller 63a. In addition,
In the condition setting file 56, the data management communication control process 58 has a monitoring cycle of, for example, 10 minutes (= 60000).
(0 milliseconds).

On the other hand, the RW of the register of the controller 53
When the 0 bit of the 001 word is set as a request from the central monitoring controller 55, it may be set by the internal logic of the controller 53.

The communication device control process 57 reads out the telephone number of the controller 63a on the site side from the setting file 56, transmits a control command to the modem 52, and transmits the control command to the modem 62a of the device 2a on the site side. Here, modem 5
When the control command arrives at 2 and the line connection is established, the communication device control process 57 transmits a transfer instruction to the communication device control process 67a on the site side. Upon receiving the command, the communication device control process 67a transfers the command to the data management communication control process 68a. The data management communication control process 68a transfers the command to the controller communication process 69a. Controller communication process 69a
Transfers the command to the controller 63a, and upon receiving the command execution result, transfers the command to the data management communication control process 68a.

The data management communication control process 68a on the site side transfers the execution result to the communication device control process 57 on the central side via the communication device process 67a, the communication network 3, and the modem 52. The communication device process 57 transfers the received execution result on the local station side to the data management communication control process 58 on the central side. This execution result contains a value for 32 words. The configuration file 56 contains the controller 5
3 describes an instruction for writing data. However, the portion of the value to be written is "[ ^* ]". The data management communication control process 58 rewrites the 32-word data received in the “[ ^* ]” portion to create a complete command, and transmits this to the controller 53 via the controller communication process 59. As a result, the contents of the controller 63a on the site side can be transferred to the register of the controller 53.

The central monitoring and control device 55 checks the register of the controller 53 at regular intervals, and if the data is updated, reads the data and stores it in a storage device (not shown).

(Embodiment Corresponding to Claim 5) In this monitoring control system, for convenience of explanation, only the central control room side device 1 and the plant A side device 2a are constituted, and the controller 63a of the plant side is The data of 32 words is transferred from the register to the central monitoring controller 55. However, the usable register area of the controller 53 has only 16 words. In this case, if 32 words of data are written into the register of the controller 53 at one time, the data will be destroyed. Therefore, the data is transferred twice in 16 words. Configuration file 5 at this time
The example of No. 6 is as follows.

<Condition setting file> Monitoring cycle: 600000 Execution condition: (A01DRRW0010) Writing condition: (A01DRRW0011) Connection destination: PLC-A (programmable controller) Transfer command: (A01DRW002, 32) Result command: (A01DRWRW002, [ 16]) <Phone number setting file> PLC-A: xxx · xxx-xxx In this example, the monitoring cycle, the execution condition, the connection destination, and the transfer command are the same as those in the embodiment according to the fourth aspect. When the execution condition is satisfied, a line is established with the local equipment 2a, and a transfer command is transmitted. At this time, similarly to the above, the transfer command to the controller 63 and the execution result are returned to the data monitoring communication control process 58 on the central side. The execution result contains data for 32 words. However, the writable register area of the controller 53 is R
There are only 16 words from W002. The portion where the result of receiving the result command is embedded is "[16]", which indicates that.

Therefore, the data management communication control process 58
Creates a result instruction for embedding the first 16 words of data in the result instruction. Next, an instruction to read a bit indicating whether writing to the controller 53 is possible is described. The operation is the same as the execution condition. When the bit RW0011 of the write condition is 1, it indicates that 16 writable register areas of the controller 53 are in use. In this case, retry is repeated at regular intervals, and when the bit RW0011 of the write condition becomes 0,
The created result command is transmitted to the controller 53 via the controller communication process 59, and the data is written to the register. When the data writing is completed, an instruction for setting the bit RW0011 specified by the writing condition is created, and similarly, the command is transmitted to the controller 53 via the controller communication process 59, and the bit RW0011 is set.

The central monitoring controller 55 monitors the write condition bit RW0011. When this bit is set, it determines that valid data has been written, and transfers the data from the register area of the controller 53. When the data transfer is completed, the write condition bit RW0011 is erased.

When the writing of the first 16 words is completed, the data management communication control process 58 creates a write command for writing the next 16 words. Writing is performed after checking the same writing condition RW0011 as the writing of the first 16 words. The central monitoring controller 55 also monitors the write condition bit RW0011 and transfers data.

Thus, the transfer of 32-word data can be completed as described above. That is, when data in a larger register area is transferred, the data can be written to the register of the controller 53 by repeating such an operation.

(Embodiment Corresponding to Claim 6) In this monitoring and control system, the central control room side device 1 and a plurality of plant A and B side devices 2a and 2b are provided. 2a controller 63 and station B side device 2b
Transfer of the contents of the register with the controller 63 to the central monitoring and control device 55 is considered. On the other hand, the writable register area of the central controller 53 is 32 words,
The transfer data from the controllers 63a and 63b is also 32 words each. Configuration file 56 at this time
Is as follows.

<Condition Setting File> * Condition 1 Monitoring cycle: 600000 Execution condition: (A01DRRW0010) Write condition: (A01DRRW0011) Connection destination: PLC-A (programmable controller 63)
a) Transfer command: (A01DRRW002, 32) Result command: (A01DRWRW002, [32]) <Phone number setting file> PLC-A: xxx · xxx-xxx * Condition 2 Monitoring cycle: 600000 Execution condition: (A01DRRW0020) Write Condition: (A01DRRW0011) Connection destination: PLC-B (programmable controller 63
b) Transfer command: (A01DRW002, 32) Result command: (A01DRW002, [32]) * Condition 3 <Phone number setting file> PLC-A: xxx.xxx-xxx PLC-B: yyy.yyyy-yyy The monitoring cycle, execution condition, write condition, connection destination, and transfer command are the same as those in the embodiment according to the fifth aspect. The reception result embedded part of the result instruction is "[3
2] ", and although there is an area necessary for writing, writing cannot be performed for the same reason as in the above-described embodiment corresponding to claim 4. Note that the setting file 56 has two controllers. If the data transfer from the controllers 63a and 63b is set and the execution condition is satisfied at the same time, it is necessary not to write the data into the register area in use. If the execution conditions are satisfied at the same time,
Processing is performed in the order described in the setting file 56.

The data management communication control process 58 first requests the communication device control process 57 to connect to the site-side device 2a. The communication device control process 57 searches the setting file 56, checks the telephone number of the station side device 2a, and establishes a communication line. After that, as described above, the data of the controller 63a is transferred to the data management communication control process 58. This data management communication control process 58
The write condition bit RW0011 is checked, and first, data is written to the register of the controller 53.

Next, before the central supervisory control unit 55 transfers the data in the register area of the controller 53, the station B
Write condition bit RW so as not to overwrite the data of controller 63b on the
Stand 0011. When the data transfer is completed, central monitoring controller 55 erases write condition bit RW0011. By performing the same processing for the controller 63b, the controllers 63a, 6
3b can be collected by the central monitoring and control device 55.

(Embodiment Corresponding to Claim 7) In this monitoring control system, only the central control room side device 1 and the plant A side device 2a are configured, and the central monitoring room 32 for the controller 63a of 2a
Consider the case of transferring data for words. An example of the setting file 56 at this time is as follows.

<Condition Setting File> * Condition 1 Monitoring cycle: 10000 Execution condition: (A01DRRW0010) Connection destination: PLC-A (programmable controller 63)
a) Transfer instruction: (A01DRRW003, [RW002,3
2]) Result command: (A01DWRW010, [ ^* ]) <Phone number setting file> PLC-A: xxx.xxx-xxx In this monitoring control system, the central monitoring control device 5
5 writes data of 32 words from the area RW002 to the register of the controller 63a, and executes the execution condition bit RW
Make 0010. Data management communication control process 58
Checks the execution condition bit every 10 seconds (= 10000 milliseconds), and when the execution condition is satisfied, transmits a transfer command in the same manner as in the embodiment according to claim 4. However, before transmitting the transfer command, the data in the register area of the controller 53 must be read to complete the transfer command. The part of the transfer instruction that is "[RW002, 32]" has that meaning. Therefore, the controller 5
The data of 32 words is read from the third register RW002, and the data is partially replaced with "[RW002, 32]". The data management communication control process 58 transfers the completed transfer command in the same manner as the embodiment according to claim 4, and receives the execution result. This reception result is the status of execution of the write command. This is written in a word determined by the result command. (Embodiment corresponding to claim 8) In this monitoring control system, the central control room side device 1 and the plant A side device 2a
A case will be considered in which only the configuration is the same as that of the embodiment according to claim 7, and data of 32 words is transferred from the central monitoring and control device 55 to the controller 63a of the site A-side device 2a. However, in this example,
It is assumed that the available register area of the controller 53 has only 16 words. As a result, if 32 words of data are written to the register of the controller 53 at one time, the data will be destroyed. Therefore, data transfer is performed twice in 16 word units. An example of the setting file 56 at this time is as follows.

<Condition setting file> Monitoring cycle: 10000 Execution condition: (A01DRRW0010) Writing condition: (A01DRRW0011) Connection destination: PLC-A (programmable controller 63)
a) Transfer instruction: (A01DRRW003, [RW002, 1
6]) Result instruction: (A01DRW002, [ ^* ]) Execution condition: (A01DRRW0020) Write condition: (A01DRRW0011) Connection destination: PLC-A (programmable controller 63)
a) Transfer instruction: (A01DRRW019, [RW002, 1
6]) Result command: (A01DWRW002, [ ^* ]) <Phone number setting file> PLC-A: xxx.xxx-xxx In the child monitoring control system, the central monitoring control device 55 stores the first 16 words in the register of the controller 53. Write to the area, and set the first execution condition bit RW0010 and write condition bit RW0011. Thereafter, data transfer is performed in the same manner as in the embodiment corresponding to claim 7. When the data transfer is completed, the execution condition bit RW0010 and the write condition bit RW0011s are erased. When the write condition bit RW0011 is erased, the central monitoring controller 55 writes the next 16 words into the register of the controller 53, and sets the second execution condition bit RW0020 and the write condition bit RW0011. In the second transfer instruction, the write address to the controller 63a is 16
Specify the address (RW019) ahead of the word. Thereafter, data transfer is performed in the same manner as in the embodiment corresponding to claim 7. With the above processing, the transfer of the 32-word data is completed.

(Embodiment Corresponding to Claim 9) This monitoring and control system comprises a central control room side device 1 and a plurality of plant A and B side devices 2a and 2b. From 55, the controller 6 of the station A side device
Consider a case where data is transferred to the register of the controller 3 and the controller 63 on the site B side. The writable register area of the controller 53 on the center side is 32 words, and the transfer data from the controllers 63a and 63b is 3 words each.
Assume two words. An example of the setting file 56 at this time is as follows.

<Condition setting file> Monitoring cycle: 10000 Execution condition: (A01DRRW0010) Writing condition: (A01DRRW0011) Connection destination: PLC-A (programmable controller 63)
a) Transfer instruction: (A01DRRW003, [RW002,3
2]) Result command: (A01DRW002, [ ^* ]) Execution condition: (A01DRRW0020) Write condition: (A01DRRW0011) Connection destination: PLC-B (programmable controller 63)
b) Transfer command: (A01DRRW003, [RW002,3
2]) Result command: (A01DWRW002, [ ^* ]) <Phone number setting file> PLC-A: xxx.xxx-xxx PLC-B: yyy.yyy-yyy In this example, the embodiment corresponds to claim 8. Works the same as. However, processing is performed in the order described in the setting file 56, and first, the central control room side device 1 and the plant A side device 2
a, Central control room side device 1 and plant B side device 2a
Establish a line between them and perform data transfer.

FIG. 9 is a block diagram showing another embodiment of the monitoring and control system according to the present invention.

This monitoring control system is a block diagram showing a portion related to time synchronization processing extracted from the system shown in FIG.

In this monitoring and control system, the central control room side device 1 and the remote local station side devices 2a,... At remote locations are connected via a communication network 3.

The central control room side device 1 is connected to the communication network 3 and is connected to the outside and the central control room 1-remote station 2
, a communication device control function unit 11 for controlling the communication device 10, a data management communication control function unit 12, and a time synchronization function unit 13 are provided. The side devices 2a,.
0a, a communication device control function unit 11a for controlling the communication device 10a, a data management communication control function unit 12a, and a time synchronization function unit 13a are provided.

Next, the operation of the above system will be described.

Time synchronization function unit 13 of central control room side device 1
Sends a connection request for the station side device 2a to the data management communication control function unit 12 in accordance with a preset time synchronization cycle. Here, the data management communication control function unit 12 communicates with the station side via the communication device control function unit 11, the communication device 10, the communication network 3, the communication device 10a, the communication device control function unit 11a, and the data management communication control function unit 12a. A line for data communication with the device 2a is established.

When the communication line is established as described above,
The time synchronization function unit 13 reads the system time of the central control room-side device 1 and sends a time synchronization request to the data station communication device 12a to the data management communication control function unit 12. Here, the data management communication control function unit 12 converts the read system time (time data) into the communication device control function unit 11,
The data is transmitted to the time synchronization function unit 13a via the communication device 10, the communication network 3, the communication device 10a, the communication device control function unit 11a, and the data management communication control function unit 12a. The time synchronization function unit 13a sets the system time of the remote local apparatus 2a using the received time data.

Therefore, according to the above-described embodiment, the time synchronization function unit 13 of the central control room-side device 1 transmits the data management communication control function unit 12 to the station side device 2a at every preset time synchronization period. Is transmitted and the time data is transmitted after the line connection is established, and is transmitted to the time synchronization function unit 13a. Therefore, the time of the remote facility side device 2a can always be adjusted to the time of the central control room side device 1. . Moreover, if the instruction format for the time synchronization process is the same as the instruction format in normal data processing,
Other time data transmission and line processing are performed by the data management communication control function units 12 and 12a, the communication device control function units 11 and 11a, and the communication devices 10 and 10 that perform normal communication processing.
a can be used as it is. As a result, even if the system is modified, only the time synchronization function needs to be modified,
A highly reliable and flexible system can be realized.

Further, another operation example of the system of the present invention shown in FIG. 9 will be described.

The time synchronization function unit 13 sends a connection request to the remote station side device 2a to the data management communication control function unit 12 based on a preset time synchronization period. Here, the data management communication control function unit 12 sends the connection request to the communication device control function unit 11-communication device 10-communication network 3
When the request is transmitted via the communication device 10a, the communication device control function unit 11a, and the data management communication control function unit 12a, the time synchronization function unit 13a of the remote local apparatus 2a that has received the request returns a message indicating the connection completion. I do.

Next, when the time synchronization function unit 13 receives the message transmitted from the remote site device 2a, the time synchronization function unit 13 informs the data management communication control function unit 12 of the time required for communication with the remote site device 2a ( A message for checking the communication delay time is transmitted, and the time is recorded at the same time.

In this state, the time synchronization function unit 13
When a response message is received from the time synchronization function unit 13a of the remote local apparatus 2a, the reception time is recorded, and the time at which the message is checked to check the time and the message received from the remote local apparatus 2a are received. The communication delay time is calculated from the time. Subsequently, the time synchronization function unit 13 transmits the time synchronization command data to the remote station 2a including the time data obtained by adding the calculated communication delay time to the current time of the system via the data management communication control function unit 12 to the remote station side. Transmit to the device 2a. When the time synchronization function unit 13a of the remote apparatus 2a cuts out the time data in the received message, the time synchronization function unit 13a changes the system time of the remote apparatus 2a according to the time data. Finally, the end message is confirmed, and a series of time synchronization work is completed.

Therefore, according to such an embodiment,
After the time synchronization function unit 13 of the central control room-side device 1 obtains a communication delay time while exchanging messages with the time synchronization function unit 13a of the remote station side devices 2a and 2b, the time synchronization function of the central control room-side device 1 Since necessary data including the communication delay time obtained from the unit 13 is transmitted, each remote station side apparatus adjusts the time while considering an error due to the time required for transmission. Can be set on the device.

Further, another example of the system according to the present invention will be described. The configuration of the system is the same as that of FIG.

The case where the contents of the registers of the controller 63a of the plant side device 2a and the controller 63b of the plant side device 2b are transferred to the central supervisory controller 55 will be considered.

In this example, the operation flow itself, such as a monitoring cycle, an execution condition, a write condition, a connection destination, a transfer instruction, etc., is described in claim 6.
This is the same as the embodiment corresponding to. Upon receiving the command, the controller communication process 69a immediately transmits the command to the controller 53, and waits for a command execution result from the controller 53. Here, upon receiving the command execution result from the controller 53, the controller communication process 69a adds the time at which the command execution result was received, and returns the result to the data management communication control process 58.

When the data management communication control process 58 receives the data of the controller 63a including the reception time, it writes it to the central controller 53 via the controller communication process 59. Thereby, the central controller 53
The acquisition time is attached to the controller 63a of each remote site transferred to the controller 63a. When collecting the data of the central controller 53, the central monitoring and control device 55 can reproduce the data collected from each of the controllers 63a and 63b as one time series by arranging the data in the order of the data acquisition time.

The present invention is not limited to the above embodiment, but can be implemented with various modifications without departing from the spirit of the invention. Further, the embodiments can be implemented in combination as much as possible, and in that case, the effect of the combination can be obtained. Furthermore, the above embodiments include various upper and lower stage inventions.
Various inventions can be extracted by appropriately combining a plurality of disclosed components. For example, if an invention is extracted because some constituent elements can be omitted from all the constituent elements described in Means for Solving the Problems, the omitted part may be omitted when implementing the extracted invention. Is appropriately supplemented by well-known conventional techniques.

[0089]

As described above, according to the present invention, the following various effects can be obtained.

Conventionally, in order to transfer data from a controller installed at a remote site to a central monitoring and control device via a communication network, it is necessary to implement a communication control function by the controller itself. Resources need to be allocated to the communication function, and there are many inconveniences in the development man-hours and changes in existing facilities.

On the other hand, in the monitoring and control system according to the present invention, the controller and the communication function are separated from each other, and the communication function enables data transmission and reception without affecting the controller. Since it can be used and the communication function can be used for general purposes, the number of development steps can be significantly reduced.

Further, according to the present invention, even if the writable register area of the controller of the central control room side device is small, since the interlock function is provided, the data of the controller of the central supervisory control device can be maintained without losing data. It is possible to reliably transfer data between the controller and the controller of the remote local equipment. Similarly, data collection and distribution can be easily performed between the central monitoring control device and the controllers of the plurality of station side devices.

Further, according to the present invention, data collected from a controller of each remote station apparatus scattered in a remote place includes:
By attaching the collection time at each remote station side device, it is possible to reproduce the data collected from each controller as one time series, and even in a system consisting of many distributed control devices located at remote locations ,
Time management can be performed accurately, and monitoring of the central control room-side device can be performed efficiently.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a monitoring control system according to the present invention with a functional concept.

FIG. 3 is a block diagram showing, for example, a unit of the central control room side device shown in FIG. 1;

FIG. 4 is a diagram showing a selection configuration of a plurality of protocols implemented in the controller communication function unit shown in FIG. 1;

FIG. 5 is a diagram illustrating a data format of a controller.

FIG. 6 is a data array configuration diagram of a controller register management table set in the data management communication control function unit 12 of the central control room side device.

FIG. 7 is a diagram showing a processing flow for preventing unauthorized access using data of a controller register management table.

FIG. 8 is a configuration diagram showing another embodiment of the monitoring control system according to the present invention.

FIG. 9 is a configuration diagram showing still another embodiment of the monitoring control system according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Central control room side apparatus 2a, 2b ... Remote station side apparatus 3 ... Communication network 10, 10A ... Communication equipment 11, 11A ... Communication equipment control function part 12, 12A ... Data management communication control function part 13, 13A ... Time synchronization Functional unit 15, 15A Controller 16 Monitoring management device 51 Data management communication control computer 53 Controller 55 Central monitoring control device 56 Setting file 57 Communication device control process 58 Data management communication control process 59 Controller communication process 61a, 61b: Data management communication control computer 63a, 63b: Controller 66a, 66b: Setting file 67a, 67b: Communication device control process 68a, 68b: Data management communication control process 69a, 69b: Controller communication process

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H04M 11/00 301 H04M 11/00 301 (72) Inventor Yukihiko Tomizawa 1-1-1, Shibaura, Minato-ku, Tokyo, Ltd. In the Toshiba head office (72) Inventor Akira Hirahara 1 Toshiba-cho, Fuchu-shi, Tokyo Tokyo, Japan Inside the Fuchu office, Toshiba Corporation (72) Inventor Hiroshi Nakatani 1 Toshiba-cho, Fuchu-shi, Tokyo, Tokyo Fuchu office, Toshiba Corporation (72) Invention Person Yasuo Yamamoto 1 Toshiba-cho, Fuchu-shi, Tokyo F-term in the Fuchu office of Toshiba Corporation 2F073 AA11 AB01 BB09 BC01 CC03 CC05 CC07 CC09 CD17 DD03 DE13 FG01 FG02 FG03 GG01 GG06 GG08 GG09 5H215 BB16 CC09 CX08 GG03 H07 BA23 DA02 DC04 DC07 EB02 EB06 EB11 HA01 HA02 5K101 KK11 LL01

Claims (12)

[Claims] 1. A central control room side device provided with a management and monitoring device with a display device for providing necessary information to an operator and a field side device distributed and arranged at a remote place are connected via a communication network. In the monitoring control system, the central control room-side device and the site-side device control a communication device that exchanges data with each other via the communication network, a controller having a required control function, and the communication device. A communication device control function unit, a controller communication function unit for performing read / write processing of an internal register of the controller, and a data management communication control function unit for controlling and managing the communication device control function unit and the controller communication function unit. The communication device control function unit, the data management communication control function unit, and the controller communication function unit. Implemented in a unit, and that each functional unit in this single unit has a role as a controller communication unit acting as a substitute for the communication function of the controller under an instruction from the management and monitoring device or under a predetermined cycle. Characteristic monitoring and control system. 2. The supervisory control system according to claim 1, wherein the controller communication function means of the central control room side device comprises:
A monitoring and control system comprising: a plurality of controller protocols; and a protocol selection unit that selects one of the controller protocols based on an external instruction. 3. The monitoring control system according to claim 1, wherein the data management communication control function means of the central control room-side device describes an accessible controller register and an access prohibition attribute of at least the site-side device managed by itself. Before writing the data collected from each field-side device to its own central controller, the controller checks the attributes of the registers described in the table and prohibits unauthorized access. Monitoring and control system. 4. The monitoring control system according to claim 1, wherein the controller communication unit is provided with a setting file for setting conditions for transferring the contents of a register of the controller, a telephone number of a partner device, a command for transmission, and the like. The controller communication unit of the site-side device transfers the register content of the site-side controller to the register of the central controller in the central control room-side device according to the content of the setting file, A supervisory control system, wherein the controller communication unit transfers the contents of a register of the central controller to a storage device of the management and monitoring device. 5. The monitoring control system according to claim 1, wherein a register area of a central controller in the central control room-side device is smaller than a data amount sent from a register of a controller of the site-side device. The controller communication unit is provided with a setting file describing at least a writable register area and a writing condition of the central controller, and the data management communication control function means is configured to register the controller of the site-side device according to the description contents of the setting file. A data sent from the central controller in a register area of the central controller. 6. The supervisory control system according to claim 1, wherein a central controller in the central control room-side device receives data sent from a register of a controller of the plurality of site-side devices. Providing a setting file that describes at least a plurality of site-side devices in the execution order, and when receiving the register data of the controllers of the plurality of site-side devices substantially simultaneously, monitors and manages the data in accordance with the execution order of the setting file. A monitoring and control system, wherein the transfer is stored in a register of the central controller while confirming the transfer in a storage device of the device. 7. The monitoring and control system according to claim 1, wherein when the management and monitoring device stores data in a register of the central controller under a predetermined execution condition bit setting, A supervisory control system, wherein the management communication control function means transfers data stored in the register to a register of a required field-side device controller based on an execution condition bit in a register of the central controller. 8. The monitoring and control system according to claim 1, wherein a register area of a controller of the on-site device is smaller than a data amount sent from a register of a central controller in the central control room-side device. The controller communication unit of the field device is provided with a setting file describing at least a writable register area and a writing condition of the field controller, and the data management communication control function means of the field device, according to the description contents of the setting file A supervisory control system, wherein data sent from a register of a central controller of the central control room-side device is written in a register area of the site-side controller. 9. The monitoring control system according to claim 1, wherein the data stored in the storage device of the monitoring management device in the central control room is transferred to a register of a controller of a plurality of field devices. The controller communication unit of the control room side device is
At least a setting file describing the execution order of the plurality of site-side devices is provided, and the data management communication control function means of the central control room-side device establishes a line with the site-side device sequentially according to the execution order of the setting file, A supervisory control system wherein the information is stored in a register of a controller of a side device. 10. The monitoring and control system according to claim 1, wherein the central control room-side device includes means for transmitting a time synchronization request of current time data, and The apparatus further comprises means for setting a current time based on the current time data, and supervising and controlling the current times of the plurality of site-side devices based on the current time from the central control room-side device. system. 11. The monitoring control system according to claim 1, wherein the central control room-side device is configured to send a request to the site-side device via the data management communication control function means. A time synchronization function unit for measuring a communication delay time from a signal transmission time and a reception time of a signal returned from the site device based on the required signal; The communication control function means communicates time data obtained by adding the communication delay time measured by the time synchronization function means to the current time to the site-side device, and the site-side device calculates a time in consideration of the communication delay time. A monitoring control system characterized by comprising setting means for setting. 12. The method according to claim 1, wherein:
In the monitoring and control system according to (1), the site-side device is configured to set time data based on current time data notified from the central control room-side device, and the setting is performed at the time of data transfer of a register of the site-side controller. Means for attaching and transferring the current time to be clocked based on the received time data, wherein the central control room-side device transmits a time synchronization request for the current time data, and the site-side device Means for attaching and storing the transferred current time when storing the register data of the controller transferred from the central controller in the register of the central controller, and chronologically collecting the data collected from each controller of the on-site side device. A monitoring and control system characterized by being reproducible.