JP2000039901A - Remote monitoring and adjusting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remotely adjust control parameters of a controller in the field while sending and receiving necessary data without thinning out them. SOLUTION: In the field 2, a communication line 13 for sending data of a control system 1 consisting of a controller 11 and a control object 12 to a field terminal 14 and a display device 15 are arranged. In a remote place 3, a remote terminal 17 and a display device 18 are installed and connected to the field terminal 14 through a communication line 16. Control parameters are adjusted from the remote terminal 17 and sent to the field terminal 14 to adjust the control function of the controller 11. Further, transmission and reception data on the communication line 16 are thinned out according to the priority.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for transmitting and receiving data between a local terminal and a remote terminal that is separate from a control system, or adjusting a control function of a local control device. Remote monitoring and adjustment devices.

[0002]

2. Description of the Related Art Conventionally, when data of a control device and a control target is transmitted to a terminal at a remote place, when the amount of transmission data exceeds the communication capability of a communication line, one of the following means is used. It was common to send.

[0003] First, transmission is performed by reducing the type of transmission data so that the data amount is equal to or less than the communication capability of a communication line from among a plurality of control devices and control target data. Alternatively, secondly, all the data to be transmitted is thinned out so that the total amount of the plurality of control devices and the data to be controlled is equal to or less than the communication capacity of the communication line, and the data is converted into data having a long sampling interval and transmitted.

Conventionally, when adjusting a control function of a control device, an adjuster goes to a site where the control device is installed, and the adjuster manually changes the control function from a local terminal or uses an adjustment tool. Means for calculating a new control function and changing the control function.

[0005]

As described above, when it is necessary to adjust the control parameters of the control function in the conventional control device, if the coordinator is not resident at the site, the control function is different from the site. Site coordinators and technicians need to go to the site for coordination. Therefore, a business trip time and expenses required to go to the site are required, and there is a problem of delay in adjustment work and burden of expenses.

Further, as described above, when data of a local control device and a control target are conventionally transmitted to a remote terminal, not all data is transmitted and the control device and the control target cannot all be monitored. There is a problem that only thinned-out data with a time interval can be obtained, and data with a time interval insufficient for adjusting the control function in the control device can be obtained.

Therefore, the present invention provides a remote monitoring / adjusting device which enables the control parameters of a local control device to be adjusted from a remote place, and which can efficiently transmit and receive data between the local and remote terminals. The purpose is to provide.

[0008]

According to a first aspect of the present invention, there is provided a local terminal provided near a control system having a control device for controlling a control target, and a remote terminal provided separately from the control system. A remote terminal for transmitting and receiving data to and from a local terminal via a transmission medium, a remote monitoring / adjusting device, wherein the local terminal collects data of a control target of the control system and the control device. Data storage means for storing, variable data thinning means for thinning data stored by the data storage means at different time intervals according to a predetermined data type, and data thinned by the variable data thinning means. Data transmission means for transmitting to a remote terminal via a transmission medium;
Data receiving means for receiving data transmitted from a remote terminal via a transmission medium, and changing control parameters of a control device based on control parameters of a control function included in the data received by the data receiving means. The remote terminal includes a data receiving means for receiving data transmitted from a local terminal via a transmission medium, and a data storage for storing data received by the data receiving means and necessary data. Means, control function adjusting means for adjusting a control parameter of a control function set in the control device, and data transmitting means for transmitting the control parameter adjusted by the control function adjusting means to a local terminal. It is. According to this means, the control parameter of the control function adjusted by the control function adjusting means of the remote terminal is transmitted to the local terminal via the transmission medium, and the control parameter of the control device is changed by the control function changing means of the local terminal. You. This allows for immediate adjustment and generally eliminates the need for the coordinator to travel to an unmanned site for adjustment of control parameters, thus avoiding the situation where an unstable state is left until the visitor arrives at the site. be able to. Further, the data is decimated and transmitted by the variable data decimating means according to the type of data such as importance. As a result, data such as truly necessary control parameters is transmitted in a short time and accurate control can be performed.

According to a second aspect of the present invention, in the remote monitoring / adjusting apparatus according to the first aspect, test condition determining means for determining test conditions such as a type, a magnitude, and an application time of a test signal for performing a test of the control system. Is provided on at least one of the local terminal and the remote terminal, and the local terminal has a test condition determined by the test condition determining means,
A test signal generating means for generating a test signal and a test signal transmitting means for applying a test signal generated by the test signal generating means to a control system via a communication circuit are provided. According to this means, the test condition determination means is provided in at least one of the local terminal and the remote terminal, and various test signals for the control system are provided to various parts of the control system, so that the soundness of the control system can be verified. Therefore, the reliability of the control system can be improved.

According to a third aspect of the present invention, there is provided a remote monitoring / adjusting device according to the first or second aspect,
The remote terminal or the local terminal includes a communication line capability determining unit that determines the communication capability of the communication line, and the variable data thinning unit performs the thinning according to the determination of the communication line capability determining unit. . According to this means, since the current communication capability of the communication line is known, the optimum thinning interval can be determined by the variable data thinning means. Therefore, the transmission interval between important data and non-critical data can be made appropriate, the communication line can be operated efficiently, and there is no risk of failure in changing control parameters or monitoring the control target. can do.

According to a fourth aspect of the present invention, in the remote monitoring / adjusting device according to the first or second aspect, a communication line capacity determining means for determining the communication capacity of the communication line, and a determination result by the communication line capacity determining means. Communication path selection means for switching communication lines so as to select an optimum communication path from a plurality of communication lines based on the communication path. According to this means, a communication line having a high communication capability is selected from the plurality of communication lines, so that necessary data can be transmitted and received in a short time without running short, and the communication line can be operated efficiently. .

According to a fifth aspect of the present invention, in the remote monitoring / adjusting apparatus according to the first aspect, the remote terminal or the local terminal transmits data between the remote terminal and the local terminal via a plurality of communication lines. When transmitting and receiving, when the transmission data is divided into groups, the communication path distribution means for transmitting data using the communication line selected for each group, and when receiving data from a plurality of paths transmitted by the communication path distribution means. And a reception data integration means for integrating data from a plurality of paths while adjusting the time difference in reception time. According to this means, the transmission data is divided into groups and each communication line is shared, so that all data can be transmitted without having to thin out, and loss of transmission data does not occur. Further, since the time lag of the data received from the plurality of paths is adjusted and the respective data are integrated, the same time-accurate data as the online data can be obtained.

According to a sixth aspect of the present invention, there is provided the remote monitoring / adjusting device according to the first aspect, wherein the local terminal or the remote terminal verifies whether or not the data received by the local terminal has any loss. Means are provided. According to this means, it is verified whether there is any loss in the received data, so that accurate data can be obtained.

According to a seventh aspect of the present invention, in the remote monitoring / adjusting device according to the first aspect, the local terminal or the remote terminal is controlled based on data from the control system so that the state of the control target is within a stable range. A control object monitoring means for judging whether or not there is, and displaying the judgment result on a display device; and a control performance for judging the control performance of the control device based on data from the control system and displaying the judgment result on the display device. A determination means and an alarm generation means for notifying by an alarm when the control target is determined to be unstable by the control target monitoring means, or a recovery presentation means for displaying an operation procedure for shifting to a stable state on a display device are provided. It is like that. According to this means, it is determined whether the control target is stable or unstable based on the data from the control system. Therefore, measures can be taken immediately, and the control performance of the control device can be determined. Responsive measures can be taken promptly. Also, since the state of the control target is notified,
Immediate action can be taken or a recovery procedure can be presented, so recovery can be done in a short time.

[0015]

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

FIG. 1 is a block diagram of a remote monitoring / adjustment device according to a first embodiment of the present invention. A control system 1 includes a control device 11 and a control object 12 provided at a site 2.
And a control device 11 and a control target 12
Is connected to a local terminal 14 and a display device 15 via a communication line 13 provided at the local site 2.

On the other hand, a remote terminal 17 provided at the remote location 3
Is connected to the display device 18. Further, the local terminal 14 at the local site 2 and the remote terminal 17 at the remote site 3 are connected to a communication line 16.
Connected by

The input data to the control device 11 at the site 2, the output data of the control device 11, the output data of the control target 12, and the control function data in the control device 11 are sent to the local terminal 14 via the communication line 13. In this case, the communication line 13 is generally configured by a wire such as an ISDN line, a telephone line, and a dedicated line. However, wireless communication such as a mobile phone may be used. Alternatively, a plurality of lines may be used simultaneously.

The local terminal 14 is configured as shown in FIG. 2, stores data obtained via the communication line 13 in the data storage means 25, and displays the data on the display device 15 as numerical values or graphs.

Further, the data obtained via the communication line 13 is sent to the variable data thinning means 24 shown in FIG. 2 and subjected to a thinning process. Via the remote terminal 17. This communication line 16 is, like the communication line 13,
Use a wired line such as a DN line, a telephone line, a dedicated line, or a wireless line such as a mobile phone. Alternatively, a plurality of lines may be used simultaneously.

When the control parameters of the control function are sent from the remote terminal 17, the local terminal 14 receives the control parameters by the data receiving means 22, displays the control parameters on the display device 15, and displays the control parameters by the control function changing means 23. The control device 11 via the communication line 13 by means not shown
To adjust the control parameters of the corresponding control function in the control device 11.

The remote terminal 17 receives the control parameters of the control function of the control device 11 provided in the control system 1 transmitted from the local terminal 14 via the communication line 16 by the data receiving means 31 and stores the control parameters in a memory or a hard disk. The data stored in the data storage unit 34 and received by the display device 18 is displayed in a numerical value or a graph format.

If necessary, control parameters of the control function of the control device 11 are calculated by the control function adjusting means 33 using the received data, and transmitted to the local terminal 14 via the communication line 16 by the data transmitting means 32. I do.

The variable data thinning means 24 is a communication line 1
3, the thinning-out interval is calculated for each type of data according to a preset priority, the data is thinned out, and the thinned-out data is passed to the data transmitting means 21. This thinning interval can be determined in advance for each type of signal, but can also be set individually by a coordinator at the site 2 or at the remote site 3.

FIG. 4 shows an example of an input screen 70 for inputting the thinning interval. At least the name of the data and the description of the data are displayed in advance on the input screen, and a priority can be input for the displayed data.

The control function adjusting means 33 allows the coordinator at the remote location 3 to determine a new control parameter based on the past adjustment experience and past cases based on the data sent from the local terminal 14, or Determine new control parameters using existing tuning tools.

Various control functions such as PID type, optimal regulator type, H∞ control type, delay / advance type can be used for the control function of the controller 11, but in the following, the PID type is used as an example to adjust the existing adjustment function. The tool will be described.

A transfer function model of the controlled object 12 is calculated by using the least squares method or the like for input data and output data for the controlled object 12. At this time, by adding a test signal to the control system 1 and using input data and output data at that time, a transfer function model with higher accuracy can be calculated. For this transfer function model, the limit sensitivity method, which is a method for calculating the control parameters of the PID type control function, Zieg
Calculate control parameters using the ler and Nichols method, partial model matching for closed-loop response, and model matching in the frequency domain.

As described above, according to the first embodiment, the control parameters of the control function adjusted by the control function adjusting means of the remote terminal are transmitted to the local terminal via the transmission medium,
The control parameters of the control device are changed by the control function changing means of the local terminal. This allows for immediate adjustment and generally eliminates the need for the coordinator to travel to an unmanned site for adjustment of control parameters, thus avoiding the situation where an unstable state is left until the visitor arrives at the site. be able to. Further, the data is decimated and transmitted by the variable data decimating means according to the type of data such as importance. As a result, data such as truly necessary control parameters is transmitted in a short time and accurate control can be performed.

FIG. 5 is a configuration diagram of a local terminal according to the second embodiment of the present invention.

Referring to FIG. 5, FIG. 2 shows the first embodiment.
The same reference numerals as those shown in FIG.
Differs from FIG. 2 in that a test condition determining means 41, a test signal generating means 42, and a test signal transmitting means 43 are additionally provided.

Here, the test condition determining means 41 determines the type, magnitude and application time of the test signal to be applied to the control system 1. The test signal generating means 42 generates a test signal according to a test condition. The test signal transmitting means 43 is for applying a test signal to the control system 1 via the communication line 13.

First, the test condition determining means 41
The type of signal, signal magnitude, signal application time, and signal application location required to generate the test signal are determined. The types of the signal include a step signal, a rectangular wave signal, an M-sequence signal, a random signal, and the like. In addition, the signal application location includes an input signal of the control target 12, a target value signal, and the like. Next, an actual test signal is calculated by the test signal generator 42 based on the condition determined by the test condition determiner 41, and the test signal is applied to the application point designated by the test signal transmitter 43.

As described above, according to the second embodiment, various test signals for the control system are provided from the local terminal to various parts of the control system, and the soundness of the control system can be verified. Therefore, the reliability of the control system can be improved.

FIG. 6 is a block diagram of a local terminal of the remote monitoring / adjustment device according to the third embodiment of the present invention.
FIG. 2 is a configuration diagram of a remote terminal of the remote monitoring / adjustment device.

FIG. 6 shows a first embodiment of FIG.
6 denote the same or corresponding parts, and FIG.
Is different from FIG. 2 in that a test signal generating means 42B and a test signal transmitting means 43B are additionally provided. 7, the same reference numerals as those in FIG. 3 showing the first embodiment denote the same or corresponding parts, and FIG. 7 additionally includes a test condition determining means 53 in FIG.

The test condition determination means 53 provided in the remote terminal 17B determines the test conditions of the type, magnitude and application time of the test signal to be applied to the control system 1, and uses the data transmission means 32 to convert the test conditions to the local terminal 14B. To send to. The test signal generating means 42B generates a test signal in accordance with the test condition received by the data receiving means 22 of the local terminal 14B and transmits the test signal to the communication line 13
Via the control system 1.

The test condition determination means 53 determines the type of signal, the signal magnitude, the signal application time, and the signal application location necessary for generating a test signal to be applied to the control system 1, and the data transmission means. At 32, the test conditions are transmitted to the local terminal 14B. Types of this signal include a step signal, a rectangular wave signal, an M-sequence signal,
There are random signals and the like. In addition, the signal application location includes an input signal of the control target 12, a target value signal, and the like. The test signal generator 42B calculates a test signal according to the test condition determined by the test condition determiner 53, and the test signal is applied to the application location specified by the test signal transmitter 43B.

As described above, according to the third embodiment, generally, the test condition is determined at the remote terminal where the coordinator is stationed, the test condition is transmitted to the local terminal, and the test signal is provided to the control system by the local terminal. And verify the soundness of the control system. Therefore, it is possible to reduce the trouble of the coordinator traveling on site with the measuring instrument, to perform the test in a short time, and to improve the reliability of the control system.

FIG. 8 is a configuration diagram of a local terminal according to a fourth embodiment of the present invention, and FIG. 9 is a configuration diagram of a remote terminal.

8 and 9, the same reference numerals as those in FIG. 2 showing the first embodiment denote the same or corresponding parts, and FIG. 8 additionally includes a communication line capability judging means 56 in FIG. FIG. 9 additionally includes a communication line capability determining means 58 in FIG.

Here, the communication line capability determining means 56 is provided in the local terminal 14C and determines the communication capability of the currently available communication line. Communication line capacity determination means 5
Reference numeral 8 is the same as the communication line capability determination means 56, which is provided in the remote terminal 17C and determines the communication capability of the currently usable communication circuit.

When the communication line 13 or the communication line 16 connected to the local terminal 14C or the remote terminal 17C is used, the communication line capability determination means 56 and the communication line capability determination means 58 Available data amount (usually bit (Kbit, Mbit) / sec or byte (Kbyte, Mby
te) / sec) is calculated. The calculation of the amount of data that can be transmitted / received in this unit time is performed, for example, by transmitting a test signal from the local terminal 14C to the remote terminal 17C, transmitting the transmission data from the remote terminal 17C to the local terminal 14C, and transmitting the data. It can be obtained from the time that was done.
The calculated data amount that can be transmitted / received in the unit time is displayed on the display device 15 or the display device 18 shown in FIG. 1, and the current status of the communication line can be confirmed.

Further, from the calculated data amount, the optimum thinning interval in the variable data thinning means 24 can be obtained. For example, if the data to be sent is 800
It is assumed that each data has a size of 4 bytes and is recorded every second. At this time, to send all data every second, a capacity of 3.2 kbyte / sec is required. However, the communication data amount of the communication line is 2 kbyte / sec (2000 byte / se
If c), the transmission capacity is insufficient. Now, it is assumed that the important data is 200 points in the transmission target data, and the important data is not thinned out. At this time, with respect to the remaining data, the thinning interval is 2 and the interval is 2 seconds. As a result, the transmission data per second is 200 important data, 300 non-important data,
The transmission data amount is (200 + 300) × 4 bytes = 2 kbytes, and all data can be transmitted while the transmission interval of important data is stored in the recording interval.

As described above, according to the fourth embodiment, since the current communication capability of the communication line is known, the optimum thinning interval can be determined by the variable data thinning means. Therefore, the transmission interval between important data and non-critical data can be made appropriate, the communication line can be operated efficiently, and there is no risk of failure in changing control parameters or monitoring the control target. can do.

FIG. 10 is a block diagram of a local terminal according to a fifth embodiment of the present invention, and FIG. 11 is a block diagram of a corresponding remote terminal.

In FIGS. 10 and 11, the same reference numerals as those in FIGS. 8 and 9 showing the fourth embodiment denote the same or corresponding parts, and FIG. FIG. 11 additionally shows a communication path selecting means 62 in FIG.

Here, the communication path selecting means 60 is provided in the local terminal 14D, and selects the optimum communication path based on the judgment result obtained by the communication line capacity judging means 56 so as to select the optimum communication path. 22. Further, the communication path selecting means 62 notifies the data receiving means 31 and the data transmitting means 32 to select the optimum communication path based on the determination result obtained by the communication line capacity determining means 58 provided in the local terminal 14D. Things.

When two or more communication lines are available, the communication path selecting means 60 and the communication path selecting means 62 select an optimum communication line from the available communication lines.
For example, the communication capability of each line is measured by the communication line capability determining means 56 or 58, and the line determined to have the highest communication capability is selected.

As described above, according to the fifth embodiment, a communication line having a high communication capability is selected from a plurality of communication lines, so that necessary data can be transmitted and received in a short time without running short. Can be operated efficiently.

FIG. 12 is a block diagram of a local terminal showing a sixth embodiment of the present invention, and FIG. 13 is a block diagram of a corresponding remote terminal.

In FIGS. 12 and 13, the same reference numerals as those in FIGS. 2 and 3 showing the first embodiment denote the same or corresponding parts, and FIG. FIG. 13 additionally shows a communication path distribution means 68 in FIG.

Here, the communication path distribution means 64 is provided in the local terminal 14E, divides transmission data into a plurality of groups, and transmits data using different communication circuits for each group. The communication path distribution means 68 is provided in the remote terminal 17E, divides transmission data into a plurality of groups, and transmits data using different communication circuits for each group.

First, when there are two or more communication lines, the communication path distribution means 64 and the communication path distribution means 68
The transmission data is divided into smaller pieces than can be transmitted on each line, and data transmission is performed using each communication line. For example, when 1 data is 4 bytes in size and 800 data are recorded per second, and as communication lines, two lines, a line 1 having a communication capability of 2 kbytes / sec and a line 2 having a communication capability of 1.5 kbytes / sec, can be used. Of the 800 data, 450 data (1.8kb
yte / sec) on communication line 1 and the remaining 350 data (1.4 kb
yte / sec) on line 2
All data can be transmitted without thinning.

As described above, according to the sixth embodiment, the transmission data is divided into groups, and each communication line is shared, so that it is possible to transmit the data without thinning out all the data, and it is possible to transmit data without loss. Will not occur.

FIG. 14 is a configuration diagram of a local terminal according to the seventh embodiment of the present invention, and FIG. 15 is a configuration diagram of a corresponding remote terminal.

In FIGS. 14 and 15, the same reference numerals as those in FIGS. 2 and 3 showing the first embodiment denote the same or corresponding parts, and FIG. FIG. 15 additionally shows the reception data integrating means 72 in FIG.

Here, the reception data integrating means 71 receives data from a plurality of paths provided in the local terminal 14F,
It adjusts the time lag due to each reception and integrates data of a plurality of paths. The reception data integration means 72 receives data from a plurality of paths provided in the remote terminal 17F,
It adjusts the time lag due to each reception and integrates data of a plurality of paths.

First, when there are two or more communication lines and communication is performed in a distributed manner by the communication path distribution means 64 or the communication path distribution means 68 as shown in FIG. 12 and FIG. The integration means 72
Receiving the distributed data, taking into account the effects of thinning and the transmission delay time depending on the communication path, correcting the time lag and integrating the divided data. FIG.
15, the communication path distribution means 64 and the communication path distribution means 68 are omitted.

For example, when data group A and data group B transmitted at the same time are transmitted using line 1 and line 2, respectively, and line 2 has a longer line transmission delay time than line 1, Data group A is received before data group B. In such a case, the reception data integration unit 71 or the reception data integration unit 72 stores the data of the data group A received earlier on a storage device such as a memory or a hard disk, and
Is received, the two data groups are integrated into one data group.

As described above, according to the seventh embodiment, the time lag of the data received from the plurality of paths is adjusted and the respective data are integrated, so that the same temporally accurate data as the online data can be obtained. Can be obtained.

FIG. 16 is a block diagram of a local terminal according to the eighth embodiment of the present invention, and FIG. 17 is a block diagram of a corresponding remote terminal.

In FIGS. 16 and 17, the same reference numerals as those in FIGS. 2 and 3 showing the first embodiment denote the same or corresponding parts, and FIG. FIG. 17 additionally shows a received data verification unit 76 in FIG.

Here, the received data verifying means 74 is provided in the local terminal 14G, and determines whether or not the data received by the data receiving means 22 is equal to the data transmitted by the data transmitting means 21. . Also,
The reception data verification unit 76 is provided in the remote terminal 17G, and determines whether the data received by the data reception unit 31 is equal to the data transmitted by the data transmission unit 32.

First, at the local terminal 14G, the data received by the data receiving means 22 is transmitted to the reception data verification means 74.
Passed to. Also, in the remote terminal 17G, the data received by the data receiving means 31 is
Passed to. The reception data verification unit 74 or the reception data verification unit 76 checks whether there is any loss in the reception data. When a loss occurs in the received data, information on the lost data is displayed on the display device 15 or on the display device 18.

As means for investigating data loss, for example,
Transmit the same data two or more times and receive data verification means 7
4. Or, in the received data verifying means 76, a means for comparing data and determining that the data does not match as lost data, or, when there are two or more communication lines, transmitting the same data through the respective lines and Data verification means 7
4, or a means for comparing the data transmitted from the respective communication lines in the received data verification means 76, and setting the data which does not match as lost data.

As described above, according to the eighth embodiment, it is verified whether there is any loss in the received data, so that accurate data can be obtained.

FIG. 18 is a block diagram of a local terminal showing a ninth embodiment of the present invention, and FIG. 19 is a block diagram of a corresponding remote terminal.

In FIGS. 18 and 19, the same reference numerals as those in FIGS. 2 and 3 showing the first embodiment denote the same or corresponding parts, and FIG. In FIG. 19, a control target monitoring means 80 is additionally provided in FIG.

Here, the control target monitoring means 78 is provided in the local terminal 14H, determines whether or not the state of the control target 12 is within a stable range, and displays the determination result on the display device 15H.
To be displayed. The control target monitoring means 80
Is provided in the remote terminal 17H, determines whether or not the state of the control target 12 is within a stable range, and displays the determination result on the display device 18.

First, the control target monitoring means 78 determines whether or not the control system 1 is in a stable state based on the operation amount data and the control amount data of the control target 12 sent from the communication line 13. . Then, the determination result is displayed on the display device 15. In this case, remote location 3
It is also possible to display the same contents on the display device 18. Also, the control target monitoring means 80 controls the communication line 1
It is determined whether the control system 1 is in a stable state based on the operation amount data and the control amount data of the control target 12 transmitted from 6. Then, the determination result is displayed on the display device 18. In this case, it is also possible to display the same contents on the display device 15 at the site 2.

If it is determined that the state deviates from the stable state, the display device 15 or the display device 18
In addition to the above display, an alarm is sounded to notify the coordinator that the control target 12 has deviated from a stable state. In addition, an operation procedure necessary for returning the controlled object 12 deviating from the stable state to the stable state is displayed on the display device 15.
Alternatively, it can be displayed on the display device 18.

Here, in order to determine whether or not the control system 1 is stable, for example, it is checked whether or not the upper limit value of the predetermined control amount data is exceeded. I do. In addition, as a procedure for returning to a stable state, a similar case in the past is searched from the database, and a recovery procedure at that time is displayed.

As described above, according to the ninth embodiment, it is determined whether the control target is stable or unstable based on the data from the control system, so that a countermeasure or the like can be taken immediately.

FIG. 20 is a block diagram of a local terminal according to the tenth embodiment of the present invention, and FIG. 21 is a block diagram of a corresponding remote terminal.

20 and 21, the same reference numerals as those in FIGS. 2 and 3 showing the first embodiment denote the same or corresponding parts, and FIG. 20 shows control performance determining means 82 in FIG. FIG. 21 shows the control performance judging means 8 in FIG.
4 has been added.

Here, the control performance determining means 82 is provided in the local terminal 14I, determines the control performance of the control device 11 from the data of the control system 1, and displays the determination result on the display device 15
To be displayed. The control performance determination means 84 is provided in the remote terminal 17I, determines the control performance of the control device 11 from the data of the control system 1, and displays the determination result on the display device 1
8 is displayed.

First, the control performance judging means 82 determines the start-up time, settling time, time required for disturbance elimination, attenuation rate, and the like of the control system 1 from the operation amount and control amount data of the control system 1 sent from the communication line 13. The control performance is calculated, and the degree of deterioration and each control performance value when compared with a predetermined desired control performance are displayed on the display device 15. In this case, the same contents can be displayed on the display device 18 at the remote place 3.

Next, the control performance judging means 84 uses the operation amount of the control system 1 and the control amount data sent from the communication line 16 to calculate the rise time, settling time, time required for disturbance elimination, attenuation rate, etc. of the control system 1. Is calculated, and the degree of deterioration and each control performance value when compared with the desired control performance given in advance are displayed on the display device 18. In this case, it is also possible to display the same contents on the display device 15 at the site 2. When it is difficult to determine the control performance from the normal data, a test signal is added to the control system 1 to calculate the control performance from the data.

As described above, according to the tenth embodiment, since the control performance of the control device is determined, it is possible to quickly take a countermeasure.

As described above, according to the present invention, the data necessary for adjusting the control function in the local control device can be transmitted to the remote terminal without any shortage at the remote terminal, and other data is also transmitted to the remote terminal. It is possible to adjust the control function in the local control device at a remote location while monitoring the data of the local control device and the control target, and it is not necessary to go to the local site, and the adjustment efficiency can be improved.

[0082]

As described above, according to the first aspect of the present invention, the control parameters of the control function adjusted by the control function adjusting means of the remote terminal are transmitted to the local terminal via the transmission medium, and Since the control parameters of the control device are changed by the control function changing means, adjustment can be performed immediately,
In general, it is not necessary for the coordinator to travel to an unmanned site for adjusting control parameters, and it is possible to avoid a situation in which an unstable state is left until the visitor arrives at the site. In addition, since the data is thinned out by the variable data thinning means according to the type of data such as the degree of importance, it is possible to transmit data such as truly necessary control parameters in a short period of time and perform accurate control.

According to the second aspect of the present invention, since various test signals for the control system are provided from the local terminal to various parts of the control system to verify the soundness of the control system, the reliability of the control system is improved. Can be improved.

According to the third aspect of the present invention, since the current communication capability of the communication line is known, the optimum thinning interval can be determined by the variable data thinning means, and the important data and the non-important data can be determined. The transmission interval can be made appropriate, the communication line can be operated efficiently, and the possibility of a failure occurring in changing control parameters or monitoring a control target can be avoided.

According to the fourth aspect of the present invention, a communication line having a high communication capability is selected from a plurality of communication lines, so that necessary data can be transmitted / received in a short time without running short and efficient operation is possible. can do.

Further, according to the fifth aspect of the present invention, the transmission data is divided into groups and each communication line is shared, so that it is possible to transmit the data without having to thin out all the data, and the transmission data can be lost. Will not occur. Further, since the time lag of the data received from the plurality of paths is adjusted and the respective data are integrated, the same time-accurate data as the online data can be obtained.

Further, according to the invention of claim 6, since it is verified whether there is any loss in the received data, accurate data can be obtained.

According to the seventh aspect of the present invention, whether the control target is stable or unstable is determined based on the data from the control system, so that it is possible to immediately take measures.
In addition, since the control performance of the control device is determined, it is possible to quickly take a countermeasure. In addition, since the state of the control target is notified, a response measure can be taken immediately, or
Since the restoration procedure is presented, restoration can be performed in a short time.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram applied to first to tenth embodiments of the present invention.

FIG. 2 is a configuration diagram showing a local terminal provided in FIG. 1;

FIG. 3 is a configuration diagram showing a remote terminal provided in FIG. 1;

FIG. 4 is an example of a thinning-out interval input screen displayed on each display device provided in FIG. 1;

FIG. 5 is a configuration diagram of a local terminal according to a second embodiment of the present invention.

FIG. 6 is a configuration diagram of a local terminal according to a third embodiment of the present invention.

FIG. 7 is a configuration diagram of a remote terminal according to a third embodiment of the present invention.

FIG. 8 is a configuration diagram of a local terminal according to a fourth embodiment of the present invention.

FIG. 9 is a configuration diagram of a remote terminal according to a fourth embodiment of the present invention.

FIG. 10 is a configuration diagram of a local terminal according to a fifth embodiment of the present invention.

FIG. 11 is a configuration diagram of a remote terminal according to a fifth embodiment of the present invention.

FIG. 12 is a configuration diagram of a local terminal according to a sixth embodiment of the present invention.

FIG. 13 is a configuration diagram of a remote terminal according to a sixth embodiment of the present invention.

FIG. 14 is a configuration diagram of a local terminal according to a seventh embodiment of the present invention.

FIG. 15 is a configuration diagram of a remote terminal according to a seventh embodiment of the present invention.

FIG. 16 is a configuration diagram of a local terminal showing an eighth embodiment of the present invention.

FIG. 17 is a configuration diagram of a remote terminal according to the eighth embodiment of the present invention.

FIG. 18 is a configuration diagram of a local terminal showing a ninth embodiment of the present invention.

FIG. 19 is a configuration diagram of a remote terminal according to a ninth embodiment of the present invention.

FIG. 20 is a configuration diagram of a local terminal according to the tenth embodiment of the present invention.

FIG. 21 is a configuration diagram of a remote terminal according to a tenth embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 control system 2 on-site 3 remote location 11 control device 12 controlled object 13, 16 communication line 14 on-site terminal 15, 18 display device 17 remote terminal 21, 32 data transmitting means 22, 31, data receiving means 23 control function changing means 24 variable data Thinning-out means 25, 34 Response data storage means 33 Control function adjusting means 41, 53 Test condition determining means 42 Test signal generating means 43 Test signal transmitting means 56, 58 Communication line capacity determining means 60, 62 Communication path selecting means 64, 68 Communication Route distribution means 71, 72 Received data integration means 74, 76 Received data verification means 78, 80 Control target monitoring means 82, 84 Control performance determination means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H004 GA25 GA27 GA28 GA34 KA31 KA78 KB01 KB18 KC17 KC18 KC44 MA52 5H223 DD07 EE06 5K048 AA00 AA06 BA21 CA05 CA07 DC04 DC07 EB02 FB08 GB01 5K101 KK11 LL03 VV01

Claims (7)

[Claims] An on-site terminal provided near a control system having a control device for controlling a control target;
A remote monitoring / adjusting device, which is provided at a remote location separate from the control system and includes a remote terminal that transmits and receives data to and from the local terminal via a transmission medium. A data storage unit that collects and stores data of a control target of the control system and the control device, and a variable that thins out data stored by the data storage unit at different time intervals according to a predetermined data type. Data thinning means, data sending means for sending data thinned out by the variable data thinning means to the remote terminal via the transmission medium, and receiving data sent from the remote terminal via the transmission medium The data receiving means and a control function of a control function included in the data received by the data receiving means. The remote terminal is provided with data receiving means for receiving data transmitted from the local terminal via the transmission medium, and the data receiving means. Data storage means for storing received data and necessary data; control function adjustment means for adjusting control parameters of a control function set in the control device; and control parameters adjusted by the control function adjustment means in the local area. A remote monitoring / adjustment device comprising: a data transmission unit for transmitting data to a terminal. 2. At least one of the local terminal and the remote terminal includes a test condition determining means for determining a test condition such as a type, a magnitude, and an application time of a test signal for performing a test of the control system. On the terminal,
Test signal generating means for generating a test signal according to a test condition determined by the test condition determining means;
2. The remote monitoring / adjusting device according to claim 1, further comprising a test signal transmitting unit that applies a test signal generated by the test signal generating unit to the control system via a communication circuit. 3. The remote terminal or the local terminal includes a communication line capability determining unit that determines a communication capability of a communication line, and the variable data thinning unit corresponds to the determination of the communication line capability determining unit. 3. The remote monitoring / adjusting apparatus according to claim 1, wherein the remote monitoring / adjusting apparatus performs thinning. 4. A communication line capacity judging means for judging the communication capacity of a communication line, and a communication line so as to select an optimum communication path from a plurality of communication lines based on a judgment result by said communication line capacity judging means. 3. The remote monitoring / adjusting device according to claim 1, further comprising a communication path selecting means for switching. 5. When the remote terminal or the local terminal transmits and receives data between the remote terminal and the local terminal via a communication path of a plurality of paths, the remote terminal or the local terminal divides transmission data into groups, and Communication path distributing means for transmitting data using a communication line selected separately, and adjusting a time difference in reception time when receiving data from a plurality of paths transmitted by the communication path distributing means; 2. The remote monitoring / adjusting device according to claim 1, further comprising a receiving data integrating means for integrating data from a plurality of paths. 6. The remote monitoring system according to claim 1, wherein the local terminal or the remote terminal includes a reception data verification unit for verifying whether data received by the local terminal is missing or not.・ Adjustment device. 7. The local terminal or the remote terminal determines whether the state of the control target is within a stable range based on data from the control system, and displays the determination result on a display device. Control performance monitoring means for displaying on the display device; control performance determination means for determining the control performance of the control device based on data from the control system; and displaying the determination result on a display device; 2. The apparatus according to claim 1, further comprising: an alarm generating unit for notifying an alarm when an object is determined to be unstable, or a restoration presenting unit for displaying an operation procedure for shifting to a stable state on a display device. Remote monitoring and adjustment device.