JP6477319B2 - Plant control system - Google Patents

Description

  The present invention relates to a plant control system for controlling a plant.

  Conventionally, in a plant control system, a plant is controlled by a programmable logic controller. This programmable logic controller is connected to a monitoring control device having an HMI (Human Machine Interface) via a network between the monitoring control device and the controller (scan transmission device). The programmable logic controller and the supervisory control device transmit data to each other.

  Here, SCADA (Supervision Control And Data Acquisition) is applied to the monitoring control device. In this SCADA, a plurality of monitoring screens are created. In SCADA, an internal TAG (a tag that does not communicate with the programmable logic controller) is used as an internal signal. Furthermore, in SCADA, I / OTAG (Input / Output TAG) (a tag that communicates with the programmable logic controller) is used as a signal for transmission with the programmable logic controller. There is an upper limit to the number of TAG points that can be used with one SCADA. Therefore, if the number of TAGs used as internal TAGs increases, the number of TAGs that can be used as I / OTAGs decreases.

  In such a plant control system, the plant may be controlled from a monitoring control device. In this case, the operator presses a control operation button or the like displayed on SCADA. Thereby, the I / OTAG corresponding to the control operation button or the like is selected. Thereafter, a confirmation button such as an execution button is pressed. As a result, the selected I / OTAG is turned ON. The I / OTAG in the ON state is transmitted to the programmable logic controller.

  If this ON state is controlled as it is on the network between the monitoring control device and the controller, the selected I / OTAG may not reach the programmable logic controller due to disconnection of the network between the monitoring control device and the controller. In this case, the programmable logic controller may erroneously determine that the selected I / OTAG has been turned off (for example, the programmable logic controller may determine that the I / OTAG is ON by continuing to receive the I / OTAG. If programmed). In order to prevent this erroneous determination, normally, the programmable logic controller detects a change in the selected I / OTAG and maintains the ON state of the selected I / OTAG.

  Here, the I / OTAG held in the ON state needs to be turned off before the next operation of the control operation button or the like. As a method for turning off the I / OTAG, there is a method in which a program that issues a command to turn off the selected I / OTAG after a certain time is executed in the SCADA and a command signal is output to the programmable logic controller. As described above, the command signal output that is turned off after a predetermined time after the I / OTAG is turned on is called a single shot output.

  In the above configuration, in order to prevent malfunction, control is executed only after the control button is pressed and then the confirmation button is pressed. Therefore, in order to hold the selected I / OTAG in SCADA, an internal TAG is required for each control operation button. Also, an internal TAG for a counter that measures a certain time on the basis of pressing of the confirmation button is required for each control operation button. Therefore, as the number of control operation buttons increases, the number of internal TAGs increases greatly. Along with this, the number of control programs increases. For this reason, there is a problem that a large amount of programs and an internal TAG are required to create a single shot output. Along with such problems, there have been problems such as a decrease in SCADA performance, a decrease in reliability due to a program error, and an increase in the amount of work when signals are added and deleted. Furthermore, since the number of TAG points is limited, there is a problem that internal TAGs are exhausted in a large-scale system.

  In order to solve such problems, various proposals have been made, for example, a plant control system capable of performing a single shot output without adding a program related to signal transmission to a monitoring controller and a programmable logic controller is proposed. (Patent Document 1). This plant control system has a control signal (control I / OTAG) corresponding to the control content of the selected plant (defined for each control operation button) for SCADA connected to a programmable logic controller that controls the plant. Is transmitted to the programmable logic controller, and then includes a single shot output function unit for transmitting an erase signal (erase I / OTAG) for erasing a control signal held in the programmable logic controller to the programmable logic controller. The output function unit has a configuration provided outside the SCADA and outside the programmable logic controller.

  According to the plant control system of Patent Document 1, since a single shot output can be realized without using a TAG other than I / OTAG (without increasing the internal TAG), a large number of TAG points are used for I / OTAG. be able to.

International Publication No. 2011/036799

  However, in the plant control system described in Patent Document 1, since SCADA directly transmits data to and from the programmable logic controller, the number of TAGs that can be handled by the entire plant control system is the number of TAGs for one SCADA. Is the upper limit. In addition, since SCADA of each supervisory control device individually manages the TAG, in a large-scale plant with a large number of SCADA, every SCADA data must be updated. Therefore, there is a problem that the amount of work for managing data increases. Furthermore, since the monitoring and control device that did not update the TAG monitors and controls the plant with the old TAG data, it is controlled with incorrect control data, the product is scratched, and the dimensions are different from the requirements. There is a risk of quality degradation. In addition, there is a possibility that an abnormality may occur in plant equipment due to an erroneous operation due to old TAG data.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a plant control system capable of expanding the TAG score. In addition, a plant control system capable of realizing a single shot output without adding a program related to signal transmission between the monitoring controller and the programmable logic controller and without using a TAG other than I / OTAG. It is.

  In order to achieve the above object, a plant control system according to the present invention has the following configuration. The plant control system includes a client machine, a server machine, and a programmable logic controller. The client machine and the server machine as the monitoring control device cooperate to control the programmable logic controller.

  The client machine has a SCADA client unit that transmits an I / OTAG name corresponding to the control content of the plant selected by the operator.

  The server machine includes a single shot output function unit and a SCADA server unit. The single shot output function unit is provided outside the SCADA server unit. The single shot output function unit receives the I / OTAG name transmitted from the SCADA client unit. The SCADA server unit manages the SCADA TAG and outputs an I / OTAG related to the I / OTAG name in accordance with a signal output from the single shot output function unit.

  The programmable logic controller controls the plant based on the I / OTAG output from the SCADA server unit.

  The client machine, the server machine, and the programmable logic controller are connected via a network device. Specifically, the SCADA client unit of the client machine is connected to the single shot output function unit of the server machine via the network between monitoring and control apparatuses. The single shot output function unit is connected to the SCADA server unit inside the server machine. The SCADA server unit is connected to the programmable logic controller via the monitoring control device / controller network.

  The single shot output function unit described above includes a storage unit, a timer counter unit, and an output unit. The storage unit stores the I / OTAG name transmitted from the SCADA client unit. When the server machine is connected to a plurality of client machines, the single shot output function unit includes a storage unit for each SCADA client unit of each client machine.

  The timer counter unit starts measurement for a predetermined time when an operation for executing control contents is performed in the SCADA client unit.

  The output unit outputs an ON signal for transmitting a control I / OTAG corresponding to the I / OTAG name stored in the storage unit to the SCADA server unit at the start of measurement for a predetermined time. Thereafter, the output unit outputs, to the SCADA server unit, an OFF signal for transmitting an erasing I / OTAG for erasing the control I / OTAG at the end of measurement for a predetermined time.

  According to the present invention, SCADA is separated into a SCADA server that manages SCADA TAGs and a SCADA client that consists of operation screens, and the management of TAGs is unified by the SCADA server. Therefore, the number of TAG points can be expanded by providing a plurality of SCADA servers. Further, according to the present invention, in a configuration in which SCADA is separated into a SCADA server and a SCADA client, without interfering with each other, without adding a program related to signal transmission between the monitoring control device and the programmable logic controller, In addition, single shot output can be realized without using a TAG other than I / OTAG.

It is a block diagram of the plant control system in Embodiment 1 of this invention. It is a data flow figure for demonstrating operation | movement of the plant control system in Embodiment 1 of this invention. It is a block diagram for demonstrating the detail of the single shot function part of the plant control system in Embodiment 1 of this invention. It is a timing chart for demonstrating operation | movement of the plant control system in Embodiment 1 of this invention. It is a block diagram of the plant control system in Embodiment 2 of this invention.

  A mode for carrying out the invention will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram of a plant control system according to Embodiment 1 of the present invention. The plant control system shown in FIG. 1 controls a programmable logic controller in cooperation with a client machine and a server machine as a monitoring control device. The monitoring control device (HMIC 1) 1 is a client machine. The monitoring control device (HMIC 2) 3 is a client machine. The monitoring control device (HMIS1) 5 is a server machine.

  A SCADA client 2 is applied to the monitoring control device (HMIC 1) 1. The SCADA client 2 displays a screen A11. On this screen A11, buttons corresponding to various control contents of the plant (not shown) are arranged. Specifically, a control operation button A14 is arranged on this screen A11. There are multiple types of control operation buttons. Specifically, a control operation button B15... And a control operation button n (not shown) are provided in addition to the control operation button A14. The control operation button A14 includes a manual button and an automatic button. The control operation button B15 includes a backward button and a forward button. In addition, a clear button 12 and an execution button 13 are also arranged on the screen A11.

  Similarly, a SCADA client 4 is applied to the supervisory control device (HMIC 2) 3. The SCADA client 4 can display a screen A21 that is the same screen as the screen A11 of the SCADA client 2. Buttons corresponding to various control contents of the plant (not shown) are arranged on the screen A21. Specifically, a control operation button A24 is arranged on this screen A21. There are multiple types of control operation buttons. Specifically, in addition to the control operation button A24, control operation buttons B25 ... and a control operation button n (not shown) are provided. In addition, a clear button 22 and an execution button 23 are also arranged on the screen A21.

  On the other hand, a SCADA server 6 is applied to the monitoring control device (HMIS 1) 5. The SCADA server 6 manages the SCADA TAG and outputs an I / OTAG related to the I / OTAG name according to the signal output from the single shot output function unit 51. The SCADA server 6 is provided with an I / OTAG storage unit 20. The I / OTAG storage unit 20 stores I / OTAG. This I / OTAG is used as a signal for transmission with the outside. Specifically, a Bit signal, an analog signal, or the like is assigned to the I / OTAG. This I / OTAG includes a signal corresponding to the control content of the plant. There is a limit to the number of I / OTAGs. Further, the SCADA server 6 is provided with an internal TAG storage unit (not shown). The internal TAG is stored in the internal TAG storage unit. This internal TAG is used as an internal signal in the SCADA server 6. There is a limit to the number of internal TAGs.

  Reference numeral 32 denotes a network between monitoring control devices. The network between monitoring control devices 32 connects the monitoring control device (HMIC1) 1, the monitoring control device (HMIC2) 3, and the monitoring control device (HMIS1) 5. In FIG. 1, the wirings of the SCADA client 2 and the SCADA client 4 and the single shot output function unit 51 in the supervisory control device (HMIS 1) 5 are not shown. The supervisory control device (HMIS1) 5 may have a redundant configuration in order to improve reliability.

  41 is a programmable logic controller. This programmable logic controller 41 is provided outside the SCADA server 6. The programmable logic controller 41 has a function of controlling a plant (not shown) based on the I / OTAG output from the SCADA server 6.

  Reference numeral 31 denotes a network between the monitoring control device and the controller. The monitoring control device / controller network 31 connects the I / OTAG storage unit 20 and the programmable logic controller 41. With this connection, the I / OTAG stored in the I / OTAG storage unit 20 is output to the programmable logic controller 41.

  In the monitoring control apparatus (HMIS 1) 5 of the present embodiment, a single shot output function unit 51 is provided outside the SCADA server 6. The single shot output function unit 51 has a function of transferring data to and from the SCADA client 2 using a function for the SCADA client 2. Similarly, a function of transferring data to and from the SCADA client 4 using a function for the SCADA client 4 is also provided. The single shot output function unit 51 has a function of outputting to the I / OTAG storage unit 20 of the SCADA server 6. Specifically, the single shot output function unit 51 includes a storage unit 60, a timer counter unit 65, and an output unit 81.

  The storage unit 60 stores the I / OTAG name transmitted from the SCADA client 2 or the SCADA client 4. The timer counter unit 65 starts measurement for a predetermined time when an operation for executing control content is performed on the SCADA client 2 or the SCADA client 4. The output unit 81 outputs to the SCADA server 6 an ON signal for transmitting a control I / OTAG corresponding to the I / OTAG name stored in the storage unit 60 at the start of measurement for a predetermined time. Thereafter, the output unit 81 outputs to the SCADA server 6 an OFF signal for transmitting an erasing I / OTAG for erasing the control I / OTAG at the end of measurement for a certain time.

  Here, the delivery of data of each function will be described using the SCADA client 2 as an example with reference to FIG. FIG. 2 is a data flow diagram for explaining the operation of the plant control system according to the first embodiment of the present invention.

  The SCADA client 2 of the client machine is connected to the single shot output function unit 51 of the server machine via the monitoring control apparatus network 32. The single shot output function unit 51 is connected to the SCADA server 6 inside the server machine. The SCADA server 6 is connected to the programmable logic controller 41 via the monitoring control device / controller network 31.

  The SCADA client 2 transmits an I / OTAG name corresponding to the control content of the selected plant to the operator. The SCADA client 2 describes a function that outputs an I / OTAG name or the like when the control operation button A14 is pressed. Specifically, when the control operation button A14 is pressed, a signal related to a symbol such as an I / OTAG name corresponding to the control operation button A14 is transmitted. The single shot output function unit 51 of the monitoring control device (HMIS1) 5 receives the signal related to the I / OTAG name transmitted from the SCADA client 2, and stores the I / OTAG name in the storage unit 60.

  At this time, if the I / OTAG name is not stored in the storage unit 60, the I / OTAG name is stored in the storage unit 60. On the other hand, when the I / OTAG name is stored in the storage unit 60, the storage of the I / OTAG name is erased from the storage unit 60. Thus, the selection of the control operation button A14 can be canceled by pressing the control operation button A14 again.

The SCADA client 2 also describes a function that responds to whether or not the I / OTAG name is stored in the storage unit 60, corresponding to the control operation button A14. Specifically, the nameplate (“manual” or “automatic”) such as the control operation button A14 corresponding to the I / OTAG name stored in the storage unit 60 is blinked, or the control operation button A14 is depressed. It is supposed to change. Thus, the selection status of the control operation button A14 and the like is clearly shown to the operator who is operating the SCADA client 2.

  Further, two functions are described in the SCADA client 2 corresponding to the execution button 13. These functions are related to the deletion of the I / OTAG name stored in the storage unit 60 and the startup of the timer counter unit 65. Specifically, when a predetermined execution operation is performed on the SCADA client 2, the I / OTAG name stored in the storage unit 60 is erased. At the same time, the timer counter unit 65 starts measuring a preset timer time as a predetermined time. Note that this function may be set to transmit the timer setting time as a factor to the timer counter unit 65.

  Further, the SCADA client 2 describes a function related to the deletion of the I / OTAG name stored in the storage unit 60 in correspondence with the clear button 12. Specifically, when the clear button 12 is pressed, the I / OTAG name stored in the storage unit 60 is deleted.

  Since there are a plurality of monitoring control devices, a single shot output function corresponding to the plurality of monitoring control devices will be described with reference to FIG. FIG. 3 is a configuration diagram for illustrating details of a single shot function unit of the plant control system according to Embodiment 1 of the present invention.

  The single shot output function unit 51 includes a storage unit 60, a timer counter unit 65, and an output unit 81. The storage unit 60 includes a control operation button storage unit (for HMIC1) 61, a control operation button storage unit (for HMIC2) 71,..., A control operation button storage unit (for HMICn) (not shown). Yes. Further, the control operation button storage unit (for HMIC1) 61 is provided with a control operation button storage unit A62, a control operation button storage unit B63,..., A control operation button storage unit n64. Similarly, the control operation button storage unit (for HMIC2) 71 is provided with a control operation button storage unit A72, a control operation button storage unit B73,..., A control operation button storage unit n74.

  The timer counter unit 65 includes a timer counter unit (for HMIC1) 66, a timer counter unit (for HMIC2) 76,..., A timer counter unit (for HMICn) (not shown).

  Next, operation | movement of a plant control system is demonstrated using FIG. FIG. 4 is a timing chart for explaining the operation of the plant control system according to the embodiment of the present invention.

  In FIG. 4, the horizontal axis is time. Reference numeral 91 denotes a storage state of the I / OTAG name corresponding to the control operation button A of the monitoring control apparatus (HMIC 1) 1. Reference numeral 92 denotes a storage state of an I / OTAG name corresponding to the control operation button B of the monitoring control apparatus (HMIC 1) 1. Reference numeral 93 denotes a storage state of an I / OTAG name corresponding to the control operation button A of the monitoring control device (HMIC 2) 3. Reference numeral 94 denotes a storage state of the I / OTAG name corresponding to the control operation button B of the monitoring control apparatus (HMIC 2) 3. Reference numeral 95 denotes a timer value corresponding to the supervisory control device (HMIC 1) 1. Reference numeral 96 denotes a timer value corresponding to the monitoring control apparatus (HMIC 2) 3. Reference numerals 97 and 98 denote output signals. Specifically, the output signal 97 is output from the output unit 81 corresponding to the control operation button A14. The output signal 98 is output from the output unit 81 corresponding to the control operation button B15.

In FIG. 4, the I / OTAG names corresponding to the control operation button A14 and the control operation button B15 are stored in the storage unit A62 and the storage unit B 63 in the order of operation when the operation is performed from the monitoring control device (HMIC1) 1. It will be done. That is, at time _{t 1,} the control when the operation button A14 is pressed by the monitor controller (HMIC1) 1, I / OTAG name corresponding to the control operation buttons A14 as shown in memory state 91 stored in the storage unit A62 Is done.

At time _{t 2} after the time _{t 1,} the control operation button B25 is pressed by the monitor controller (HMIC2) 3, I / OTAG name corresponding to the control operation button B25 as shown in memory state 94 storage unit Stored in B72.

At time _{t 3} after the time _{t 2, the} execution button 13 by monitoring the control device (HMIC1) 1 is pressed, the storage unit A62, I / OTAG name corresponding to the control operation button A14 is deleted. At the same time, the timer counter unit 66 starts a timer.

Until the timer value 95 reaches the timer set time (until the time _{t 5),} each of all the I / OTAG name output section 81, stored in the storage unit A62~ storage unit n64 The ON signal is output while synchronizing with the output signal 97 corresponding to the. When the ON signal is input, the I / OTAG storage unit 20 outputs a control I / OTAG corresponding to the ON signal to the programmable logic controller 41 via the monitoring control device / controller network 31. Thereby, it will be in the state which can control a plant by the control content of all the control I / OTAG corresponding to the output signal 97. FIG.

At time _{t 4} after time _{t 3,} in this state, the execution button 23 is pressed by the monitor controller (HMIC2) 3, the memory unit A72, the I / OTAG name corresponding to the control operation button B25 Clear Is done. At the same time, the timer counter unit 76 starts a timer.

Until the timer value 96 reaches the timer set time (until the time _{t 8),} each of all the I / OTAG name output section 81, stored in the storage unit A72~ storage unit n74 An ON signal is output while synchronizing with the output signal 98 corresponding to the above. When the ON signal is input, the I / OTAG storage unit 20 outputs a control I / OTAG corresponding to the ON signal to the programmable logic controller 41 via the monitoring control device / controller network 31. Thereby, it will be in the state which can control a plant by the control content of all the control I / OTAG corresponding to the output signal 98. FIG.

At time t ₅ after time t _4, when the timer value 95 reaches the timer setting time, the output unit 81 simultaneously outputs an output signal 97 or the like in the OFF signal. When the output signal 97 or the like that has been turned OFF is input, the I / OTAG storage unit 20 outputs all the erase I / OTAGs corresponding to each of the output signals 97 and the like to the programmable logic controller 41. As a result, the plant is brought into a stopped state with the control contents of the control I / OTAG corresponding to each of the output signals 97 and the like.

At time t ₈ after time t _7, the timer value 96 reaches the timer setting time, the output unit 81 simultaneously outputs an output signal 98 or the like in the OFF signal. When the output signal 98 or the like that has been turned OFF is input, the I / OTAG storage unit 20 outputs all the erase I / OTAGs corresponding to each of the output signals 98 and the like to the programmable logic controller 41. As a result, the plant is brought into a stopped state with the control contents of the control I / OTAG corresponding to each of the output signals 98 and the like.

At time _{t 6} after time _{t 5,} when the control operation button A24 is pressed by the monitor controller (HMIC2) 3, I / OTAG name corresponding to the control operation buttons A24 as shown in memory state 93 storage unit Stored in A72.

At time _{t 7} after the time _{t 6,} the control operation when the button A14 is pressed by the monitor controller (HMIC1) 1, I / OTAG name corresponding to again control the operation button A14 as shown in memory state 91 Is stored in the storage unit A62.

At time _{t 9} after the time _{t 8,} in this state, when the clear button 22 of the monitoring control unit (HMIC2) 3 is pressed, the storage unit A72~ storage unit n74 of HMIC2 storage unit 71 stores All I / OTAG names are erased simultaneously. Therefore, the control I / OTAG corresponding to the output signal 97 is not output from the I / OTAG storage unit 20. That is, the control state of the control I / OTAG corresponding to each of the output signals 97 etc. maintains the state where the control is stopped.

At time _{t 10} after the time _{t 9,} the execution button 13 by monitoring the control device (HMIC1) 1 is pressed, the storage unit A62, I / OTAG name corresponding to the control operation button A14 is deleted. At the same time, the timer counter unit 66 starts a timer.

Until the timer value 95 reaches the timer set time (until the time _{t 11),} each of all the I / OTAG name output section 81, stored in the storage unit A62~ storage unit n64 The ON signal is output while synchronizing with the signal output 97 corresponding to the. When the ON signal is input, the I / OTAG storage unit 20 outputs a control I / OTAG corresponding to the ON signal to the programmable logic controller 41 via the monitoring control device / controller network 31. As a result, the plant can be controlled again with the control contents of all the control I / OTAGs corresponding to the output signal 97.

At time _{t 11} after time _{t 10,} the timer value 95 reaches the timer setting time, the output unit 81 simultaneously outputs an output signal 97 or the like in the OFF signal. When the output signal 97 or the like that has been turned OFF is input, the I / OTAG storage unit 20 outputs all the erase I / OTAGs corresponding to each of the output signals 97 and the like to the programmable logic controller 41. Thereby, the plant returns to the state where the control is stopped by the control contents of the control I / OTAG corresponding to each of the output signals 97 and the like.

  According to the plant control system according to the first embodiment described above, the SCADA is separated into the SCADA server that manages the SCADA TAG and the SCADA client configured by the operation screen, and the management of the TAG is unified by the SCADA server. be able to. Therefore, by providing a plurality of SCADA servers, the number of TAG points can be expanded, and it can be applied to a large-scale plant that requires many I / OTAGs. One client machine cooperates with the single shot output function unit of a plurality of server machines, so that the entire large-scale system can be monitored by one client machine.

  Further, according to the plant control system according to the first embodiment, at the start of measurement for a certain period of time, the output unit 81 has a plurality of ONs for each of a plurality of I / OTAG names operated from a plurality of monitoring control devices. The signal output is started at the same time without interfering with each other in accordance with the operation timing of each monitoring control device. The output unit 81 outputs a plurality of OFF signals corresponding to each of the plurality of I / OTAG names at the same time without interfering with each other according to the operation timing of each monitoring control device at the end of the measurement for a certain time. . Since the I / OTAG can be output without using the internal TAG by using the I / OTAG name, the TAG in the SCADA server 6 is prevented from being enlarged. Further, without making the I / F program of the SCADA server 6 and the programmable logic controller 41 complicated, a plurality of control contents can be collectively executed without interfering with each other corresponding to the plurality of monitoring control devices. That is, the operability of plant control is improved.

Embodiment 2. FIG.
FIG. 5 is a configuration diagram of a plant control system according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to Embodiment 1 and an equivalent part, and description is abbreviate | omitted. In FIG. 5, wiring between the SCADA client 2 and the SCADA client 4 and the single shot output function unit 51 in the monitoring control device (HMIS1) 5 and the single shot output function unit 52 in the monitoring control device (HMIS2) 7. Is omitted in the figure. The monitoring control device (HMIS1) 5 and the monitoring control device (HMIS2) 7 may have a redundant configuration in order to improve reliability.

  Only one monitoring control device (HMIS1) 5 of the first embodiment is provided. On the other hand, in the second embodiment, a plurality of monitoring control devices as server machines are provided. Specifically, in addition to the supervisory control device (HMIS1) 5, a supervisory control device (HMIS2) 7,..., A supervisory control device (HMISn) (not shown) are provided as server machines.

  In the example shown in FIG. 5, the network between monitoring control devices 32 connects the monitoring control device (HMIC 1) 1, the monitoring control device (HMIC 2) 3, the monitoring control device 5 (HMIS 1), and the monitoring control device (HMIS 2) 7.

  The monitoring control device (HMIS2) 7 of the present embodiment is provided with a single shot output function unit 52 outside the SCADA server 8 as in the monitoring control device (HMIS1) 5. The single shot output function unit 52 has a function of exchanging data with the SCADA client 2 using a function for the SCADA client 2. Specifically, the function for the SCADA client 2 can specify the monitoring control device (HMIS1) 5 or the monitoring control device (HMIS2) 7 as the transmission destination of the I / OTAG name. Therefore, the SCADA client 2 can transmit the I / OTAG name to the transmission destination based on the transmission destination and the I / OTAG name predetermined for each control operation button (control content). That is, the SCADA client 2 can transmit the I / OTAG name to the single shot output function unit of a different server machine for each control operation button (control content) to be pressed.

  Similarly, a function of transferring data to and from the SCADA client 4 using a function for the SCADA client 4 is also provided. The single shot output function unit 52 has a function of outputting to the I / OTAG storage unit 30 of the SCADA server 8. Specifically, the single shot output function unit 52 includes a storage unit 80, a timer counter unit 85, and an output unit 82. Since the configuration of each unit is the same as that of the monitoring control apparatus (HMIS 1) 5 described in the first embodiment, the description thereof is omitted.

  According to the second embodiment described above, not only the I / OTAG storage unit 20 in the monitoring control device (HMIS1) 5 but also the I / OTAG storage unit 30 in the monitoring control device (HMIS2) 7 is used. Thus, the number of I / OTAG interfaces in the plant control system can be expanded. Further, without making the I / F programs of the SCADA server 6 and the SCADA server 8 and the programmable logic controller 41 complicated, a plurality of control contents are collectively executed without interfering with each other corresponding to the plurality of monitoring control devices. be able to. That is, the range of plant control can be expanded while improving the operability of plant control.

  In the second embodiment described above, the monitoring control device (HMIC1) 1 or the monitoring control device (HMIC1) 3 is “client machine” in claim 1, and the monitoring control device (HMIS1) 5 is “ Any one of the supervisory control device (HMIS2),..., The supervisory control device (HMISn) is the “second server machine” in claim 2 and the SCADA server 8 is the “second SCADA in claim 2. In the server section, the single shot output function section 52 is in the “second single shot function section” in claim 2, the storage section 80 is in the “second storage section” in claim 2, and the timer counter section 85 is in claim 2. The output unit 82 corresponds to the “second output unit” in claim 2.

  As described above, the plant control system according to the present invention can be used for a plant that is monitored and controlled using SCADA.

1 Monitoring and control device (HMIC1)
2, 4 SCADA client 3 Supervisory control device (HMIC2)
5 Monitoring and control device (HMIS1)
6, 8 SCADA server 7 Monitoring and control device (HMIS2)
12, 22 Clear button 13, 23 Execution button 14, 24 Control operation button A
15, 25 Control operation button B
20, 30 I / OTAG storage unit 31 Network between monitoring control devices and controller 32 Network between monitoring control devices 41 Programmable logic controllers 51, 52 Single shot output function unit 60, 80 Storage unit 61 Storage unit for HMIC1 62, 72 Storage unit A
63, 73 Storage unit B
64, 74 Storage unit n
65, 85 Timer counter section 66 Timer counter section (for HMIC1)
71 Memory unit for HMIC2 76 Timer counter unit (for HMIC2)
81, 82 Output unit 91 I / OTAG name storage state corresponding to control operation button A of monitoring control apparatus (HMIC1) 1 92 Storage of I / OTAG name corresponding to control operation button B of monitoring control apparatus (HMIC1) 1 State 93 Storage state of I / OTAG name corresponding to control operation button A of monitoring control apparatus (HMIC2) 3 Storage state of I / OTAG name corresponding to control operation button B of monitoring control apparatus (HMIC2) 3 Monitoring control Timer value 96 corresponding to the device (HMIC1) 1 Timer values 97 and 98 corresponding to the monitoring control device (HMIC2) 3 Output signal

Claims (1)

A client machine having a SCADA client unit that transmits an I / OTAG name corresponding to the control content of the plant selected by the operator;
The first single shot output function unit that receives the first I / OTAG name transmitted from the SCADA client unit, and the SCADA TAG are managed, and according to the signal output from the first single shot output function unit A first server machine having a first SCADA server unit for outputting an I / OTAG related to the first I / OTAG name;
The second single shot output function unit that receives the second I / OTAG name transmitted from the SCADA client unit, and the SCADA TAG is managed, according to the signal output from the second single shot output function unit A second server machine having a second SCADA server unit for outputting an I / OTAG related to the second I / OTAG name;
A programmable logic controller for controlling the plant based on the I / OTAG output from the first SCADA server unit and the second SCADA server unit,
Wherein the client machine and the first server device and the second server device connected via a first network, the first server device and the second server device and the programmable logic controller through a second network Connected,
The first single shot output function unit includes:
A first storage unit for storing the first I / OTAG name transmitted from the SCADA client unit;
A first timer counter unit that starts measuring a predetermined time when an operation to execute the first control content is performed in the SCADA client unit;
At measurement start of the predetermined time, it outputs an ON signal for transmitting the first control I / OTAG corresponding to the first I / OTAG name stored in the first storage unit to the first SCADA server unit A first output unit that outputs an OFF signal to the first SCADA server unit for transmitting the first erasure I / OTAG for erasing the first control I / OTAG at the end of the measurement of the predetermined time; , equipped with a,
The SCADA client unit sends the first I / OTAG name corresponding to the first control content to the first single shot output function unit, and the second I / OTAG name corresponding to the second control content to the second single shot. Each can be sent to the output function part,
The second single shot output function unit includes:
A second storage unit for storing the second I / OTAG name transmitted from the SCADA client unit;
A second timer counter unit that starts measuring a predetermined time when an operation to execute the second control content is performed in the SCADA client unit;
At the start of measurement for the predetermined time, an ON signal for transmitting the second control I / OTAG corresponding to the second I / OTAG name stored in the second storage unit is output to the second SCADA server unit, A second output unit that outputs an OFF signal to the second SCADA server unit for transmitting a second erasure I / OTAG for erasing the second control I / OTAG at the end of the measurement of the predetermined time;
A plant control system comprising:

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