TWI761886B - Scada web hmi server device - Google Patents

Abstract

An objective of the present invention is accelerating browser-based HMI server devices. A HMI server device (10) of the present invention is connected to a HMI terminal (21) running a web browser (21) and a PLC (2). The HMI server device (10) is equipped with a changed PLC signal extraction process (16) and a browser display update process (18). The changed PLC signal extraction process (16) is to extract a changed PLC signal name and a changed PLC signal value of a changed PLC signal. The browser display update process (18) is to extract a screen name and a part name associated with a PLC signal name that is the same as the changed PLC signal name from the screen information (13), and extract a browser name associated with the aforementioned screen name extracted from browser information (15), and send updated data containing the aforementioned extracted part name and aforementioned changed PLC signal value to a running web browser (21) corresponding to the aforementioned extracted browser name.

Description

SCADA Network HMI Server Device

The present invention relates to a SCADA web HMI server device for operating a SCADA Human Machine Interface (HMI) on a web browser.

SCADA (Supervisory Control And Data Acquisition) is known as a mechanism for monitoring and controlling social infrastructure. Social infrastructure such as steel rolling system, power transmission and transformation system, water and sewage treatment system, building management system, road system, etc.

SCADA is an industrial control system that uses computers for system monitoring and process control. SCADA systems require ad hoc (immediacy) that can match the processing capabilities of the system.

SCADA generally consists of the following sub-systems.

(1) HMI (Human Machine Interface)

The human-machine interface is a mechanism that prompts the operator the data of the object process (the monitoring object device), so that the operator can monitor and control the process. For example, Patent Document 1 discloses a SCADA human-machine interface, which is provided with a human-machine interface screen that operates on a SCADA client.

(2) Monitoring and control system

The monitoring system collects the signal data on the process and sends control commands to the process. It consists of PLC (Programable Logic Controller, programmable logic controller) and the like.

(3) Remote input and output device (Remote Input Output: RIO)

The remote input and output device is connected with the sensor set in the process, converts the sensor signal into digital data, and sends the digital data to the monitoring and control system.

(4) Communication infrastructure

The communication infrastructure connects the supervisory control system with the remote input and output devices.

[Prior Art Literature]

[Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2017-27211

The SCADA client of Patent Document 1 operates as a high-performance computer capable of executing supervisory control logic. Furthermore, when setting up a plurality of SCADA clients, it is necessary to prepare high-performance computers corresponding to the number of SCADA clients, and it is necessary to install monitoring control logic individually. Furthermore, when the SCADA client is configured as a multi-monitor configuration, it is necessary to install monitoring control logic for each HMI screen displayed on the monitor. Therefore, it is desirable to reduce the cost of SCADA human-machine interfaces.

In order to reduce the cost of SCADA human-machine interface, the applicant of the present invention is committed to developing a browser-based human-machine interface sub-system. By executing the monitoring control logic on the server The network application programming, in the user terminal (network terminal) system does not need to install individual monitoring and control logic. The user terminal only needs to display the result of the monitoring and control logic processed by the server on the web browser. Therefore, the user terminal only needs to be a low-spec computer capable of operating a web browser. For example, mobile terminals such as tablet devices can also monitor and control the system. Accordingly, a configuration in which a plurality of user terminals are connected to the server can be realized at low cost. In addition, a network terminal that does not include monitoring and control logic is called a thin client.

However, in factory monitoring, tens of thousands of PLC signals need to be processed at high speed and reflected on the HMI screen. Therefore, the high speed of the human-machine interface sub-system based on the browser is expected.

The present invention was developed to solve the above-mentioned problems. The object of the present invention is to provide a SCADA network human-machine interface server device, which reduces the data processing amount and speeds up the signal processing.

In order to achieve the above-mentioned purpose, the SCADA network human-machine interface server device of the present invention is constructed in the following manner.

The SCADA network human-machine interface server device is connected with a human-machine interface (HMI) terminal and a programmable logic controller (PLC). The human-machine interface terminal executes at least one web browser, and the web browser displays a man-machine interface screen equipped with parts for displaying the status of the factory. The aforementioned SCADA network human-machine interface server device transmits the update data required for updating the status of the aforementioned components according to the PLC signal received from the aforementioned PLC.

The aforementioned SCADA network human-machine interface server device is provided with at least one processor and a memory for storing programs. The aforementioned program is executed by the aforementioned at least one processor to cause the aforementioned at least one processor to execute processing including the following processing.

The screen information management process manages screen information, which is formed by associating the following information: the screen name of the human-machine interface screen, the part name of the part arranged on the human-machine interface screen, and the name of the part that makes the part of the human-machine interface. The PLC signal name of the aforementioned PLC signal whose state has changed.

The browser information management process manages browser information, and the browser information associates the browser name of the web browser in execution with the screen name displayed on the man-machine interface screen of the web browser in execution become.

The changing PLC signal extraction process receives a plurality of PLC signals from the above-mentioned PLC, and extracts the changed PLC signal name and the changed PLC signal value of the changed PLC signal among the plurality of PLC signals.

The browser display update process extracts the aforementioned screen name and component name associated with the PLC signal name that is the same as the aforementioned changed PLC signal name from the aforementioned screen information, extracts the aforementioned browser name associated with the aforementioned extracted screen name from the aforementioned browser information, and Send the update data including the extracted component name and the changed PLC signal value to the running web browser corresponding to the extracted browser name.

In a preferred form, the aforementioned screen information management process reads the first screen device list, the second screen device list and the derivative device list. The above-mentioned first screen device list is information formed by associating the following information: the first screen name of the first man-machine interface screen, the first part name of the first part arranged on the first man-machine interface screen, and make the state of the first part The first PLC signal name of the changed PLC signal. The second screen device list is information formed by at least associating the second screen name of the second human-machine interface screen with the second component name of the second component disposed on the second human-machine interface screen. The derivative device list is information formed by associating the name of the second part with the name of the first part of the first part that affects the state of the second part.

Furthermore, the above-mentioned screen information management process reads the device list, and adds the first screen information, the second screen information and the additional screen information to the above-mentioned screen information. The first screen information is information formed by associating the first screen name, the first component name and the first PLC signal name. The second screen information is information formed by at least associating the second screen name and the second component name. The additional screen information is the information formed by associating the following information: the second screen name, the first part name linked to the second part name through the derivative device list, and the first part name The first PLC signal name of the associated first screen device list.

Furthermore, when the name of the changed PLC signal is the same as the name of the first PLC signal, the browser display update process transmits the update data including the first part name and the value of the changed PLC signal to the current display The web browser during execution of the second human-machine interface screen.

Furthermore, the web browser in execution that is displaying the second man-machine interface screen receives the update data, and the update data includes the change PLC of the first PLC signal that changes the state of the first component. signal value. In addition, the web browser during the execution inputs the changed PLC signal value of the first PLC signal to the input for the first PLC signal. The state changes of the two parts are predetermined scripts (script), and according to the calculation result of the script, the state of the second part is changed.

According to the present invention, the SCADA network human-machine interface server device transmits updated data only to the web browser during execution of the human-machine interface screen that displays the components corresponding to the changed PLC signals. That is, the human-machine interface server device 10 only needs to perform signal processing on the PLC signal that has a change in the received PLC signal. Therefore, the amount of data processing can be greatly reduced. Furthermore, the update data is not transmitted in units of human-machine interface terminals, but in units of web browsers. Therefore, when a plurality of web browsers are executed on one HMI terminal, the update data is only transmitted to the running web browser that displays the man-machine interface screen configured with the components related to the update data. As a result, processing is not performed in a web browser irrelevant to updating data, and the data processing amount of the human-machine interface terminal can be reduced.

According to the present invention, it is possible to realize cost reduction through web application programming of the human-machine interface sub-system, and to achieve high speed by reducing the amount of data processing.

1: Human-Machine Interface

2: PLC

3: Communication device

4: RIO

5: Monitoring target device

10: Human-machine interface server device

10a: Processor

10b: Memory

10c: Web Interface

11: HMI Server Application

12: Screen information management and processing

12a: Screen information management and processing

13: Screen information

14: Browser information management processing

15: Browser Information

16: Change PLC signal extraction processing

17: PLC signal status information

18: Browser display update processing

20: Human-machine interface terminal

20A: Human-Machine Interface Terminal

20B: Human-Machine Interface Terminal

20a: Processor

20b: Memory

20c: Web Interface

20d: Input interface

20e: Monitor

21: Web Browser

21a1: Web browsers

21a2: Web browsers

21b1: Web browsers

31: Screen information

32: Device List

32a: Device List

32b: Device List

32c: Device List

32d: Device List

33: List of derivatives

S1: Step

S2: Step

S3: Step

S4: Steps

S5: Steps

S6: Steps

S7: Steps

S8: Steps

FIG. 1 is a diagram for explaining the system configuration of SCADA according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram for explaining the structure of the SCADA network human-machine interface server device according to the first embodiment of the present invention.

FIG. 3 is a diagram showing an example of the device list read by the SCADA network human-machine interface server device according to the first embodiment of the present invention.

FIG. 4 is a diagram for explaining a signal processing example of the SCADA network human-machine interface server device according to the first embodiment of the present invention.

FIG. 5 is a block diagram for explaining the structure of the SCADA network human-machine interface server device according to the second embodiment of the present invention.

FIG. 6 is a diagram showing an example of the device list and the derivative device list read by the SCADA network human-machine interface server device according to the second embodiment of the present invention.

FIG. 7 is a diagram for explaining a signal processing example of the SCADA network human-machine interface server device according to the second embodiment of the present invention.

FIG. 8 is a block diagram showing an example of the hardware configuration of the human-machine interface terminal and the network human-machine interface server.

Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. However, in the embodiments shown below, there are cases where numerical values such as the number, quantity, quantity, range, etc. of each element are described. The inventors are not limited. In addition, the structure etc. which were demonstrated in the embodiment shown below are not essential to this invention except the case where it specifically states or the case where it is limited to this structure obviously in principle. In addition, the same code|symbol is attached|subjected to the element common to each drawing, and the overlapping description is abbreviate|omitted.

Implementation type 1.

<Overall composition>

FIG. 1 is a diagram for explaining the system configuration of SCADA. The SCADA system has the following components as a sub-system: a human-machine interface (HMI) 1 , a programmable logic controller (PLC) 2 as a supervisory control system, a communication device 3 as a communication infrastructure, and an RIO 4 . The SCADA system is connected to the monitoring target device 5 via the PLC 2 or the RIO 4 .

The related descriptions of the PLC 2 (monitoring and control system), the communication device 3 (communication infrastructure), and the RIO 4 have been described in the prior art, so they are omitted here. The monitoring target device 5 is a sensor and an actuator constituting a factory to be monitored and controlled.

The human-machine interface 1 (SCADA network human-machine interface system) includes a SCADA network human-machine interface server device 10 (hereinafter referred to as the human-machine interface server device 10 ) and at least one human-machine interface terminal 20 .

The human-machine interface server device 10 is connected to the PLC 2 via a computer network. The human-machine interface server device 10 is connected to the human-machine interface terminal 20 via a computer network. The HMI server device 10 can also be connected to a plurality of HMI terminals 20 . When there is no need to distinguish each human-machine interface terminal, it is simply referred to as the human-machine interface terminal 20 .

The HMI terminal 20 is a thin client that does not include monitoring and control logic, and executes at least one web browser 21 . The web browser 21 displays a human-machine interface screen provided with components that display the status of the factory. Specifically, the human-machine interface terminal 20 has at least one monitor (display 20e in FIG. 8 ), and in one monitor, a web browser 21 is displayed in full screen. When the human-machine interface terminal 20 has a plurality of monitors, the web browser 21 is displayed in full screen on each monitor. That is, the human-machine interface terminal 20 executes a plurality of web browsers 21 .

The human-machine interface server device 10 executes the human-machine interface server application program 11 . The human-machine interface server application program has a network server function for communicating with the human-machine interface terminal 20 and an I/O server function (application server function) for communicating with the PLC 2 . The human-machine interface terminal 20 executes a web browser 21 . The human-machine interface 1 belonging to the execution environment operates as a web application in which a script (eg, JavaScript (registered trademark)) operating on the web browser 21 cooperates with the human-machine interface server application 11 .

The human-machine interface server device 10 transmits the update data required for updating the status of the parts to the web browser 21 according to the PLC signal received from the PLC 2 . The man-machine interface server device 10 receives control commands from the web browser 21 and transmits them to the PLC 2 .

<SCADA Network HMI Server Device>

Referring to the examples shown in FIG. 2 and FIG. 3 , the characteristic processing of the human-machine interface server application 11 operating in the human-machine interface server device 10 of the implementation type 1 will be described.

In FIG. 2, the human-machine interface server device 10 is connected to the human-machine interface terminal A (20A) and the human-machine interface terminal B (20B). The human-machine interface terminal A is provided with a first monitor and a second monitor. The human-machine interface terminal B is equipped with a third monitor. The first monitor displays browser A1 (21a1) in full screen. The second monitor displays browser A2 (21a2) in full screen. The third monitor displays the browser B1 (21b1) in full screen. In Figure 2, the browser A1 displays the human-machine interface screen G1, the browser A2 displays the human-machine interface screen G2, and the browser B1 displays the human-machine interface screen G3, but the human-machine interface screen displayed by each web browser The system can be freely changed by the operator's operation. When there is no need to distinguish each web browser, it is simply referred to as the web browser 21 .

As shown in FIG. 8 to be described later, the human-machine interface server device 10 includes at least one processor 10a and a memory 10b for storing programs. By being executed by the processor 10a, the program causes the processor 10a to execute processing including the following processing.

The HMI server application 11 generates a communication object for communicating with the web browser 21 and a communication object for communicating with the PLC when it is started.

Furthermore, the human-machine interface server application 11 reads the screen data 31 and the device list 32 of the human-machine interface screen where the components are arranged when it starts.

The screen data 31 is vector data defined by each HMI screen. For example, the vector data is data in Scalable Vector Graphics (SVG, Scalable Vector Graphics) format. The SVG data includes the part name, shape, position, color, and size of the parts arranged on the human-machine interface screen as attributes of the SVG components. In addition, the file name of the screen data 31 includes the screen name.

The device list 32 is the data defined by each HMI screen. For one example, the data is data in Comma-Separated Values (CSV, comma-separated values) format. The device list 32 contains part name (item name), type, comment, output PLCID, PLC address, and communication address as fields (FIG. 3). The part name is, for example, a name obtained by combining the screen name and the device number in the screen. In addition, it can also be a name formed by combining the types of parts. Each part name is a name unique to the human-machine interface 1 . In addition, the file name of the device list 32 includes the screen name.

Furthermore, the human-machine interface server application 11 generates the content of each screen according to the read screen data 31 and the device list 32 . The content includes SVG data and screen information. The HMI server application 11 is the HMI that will be requested from the web browser 21 The content corresponding to the screen is transmitted to the web browser 21 . The web browser 21 receives the content and displays a human-machine interface screen.

The human-machine interface server application 11 stores the PLC signal received from the PLC 2 in the PLC signal status information 17 . The PLC signal state information 17 stores information obtained by associating the PLC signal name of the received PLC signal with the PLC signal value. The PLC signal name is, for example, a name formed by combining the output PLCID and PLC address of FIG. 3 . Each PLC signal name is a unique name in the HMI 1.

The screen information management process 12 manages the screen information 13, which is formed by associating the following information: the screen name of the human-machine interface screen, the part name of the part arranged on the human-machine interface screen, and the part name used for the part. The PLC signal name of the PLC signal whose state changes.

The screen information 13 is generated according to the device list 32 defined by each HMI screen. In FIG. 3, as an example of the device list 32, the G1 device list 32a of the HMI screen G1, the G2 device list 32b of the HMI screen G2, and the G3 device list 32c of the HMI screen G3 are described. In FIG. 3, the screen information 13 generated according to the device list is recorded.

The browser information management process 14 manages the browser information 15, the browser information 15 is the browser name of the web browser 21 in execution and the screen name of the man-machine interface screen displayed on the web browser 21 in execution Established associations. That is, the displayed man-machine interface screen is not managed by the unit of the man-machine interface terminal, but by the unit of browser (unit of monitor). The browser name is a combination of the HMI terminal name and the monitor number (browser number). Each browser name is a unique name in the human-machine interface 1 .

In FIG. 2, the browser information management process 14 manages the following information as the browser information 15: information obtained by associating the browser name (A1) and the screen name (G1) of the web browser 21a1 in execution; Information obtained by associating the browser name (A2) of the web browser 21a2 with the screen name (G2); and associating the browser name (B1) of the web browser 21b1 in execution with the screen name (G3) information created.

The browser information 15 is updated when the web browser 21 is activated, when the web browser 21 is terminated, and when the HMI screen displayed on the web browser 21 is transferred to another HMI screen.

The changing PLC signal extraction process 16 receives a plurality of PLC signals from the PLC2, and extracts the signal name (changed PLC signal name) and the signal value (changed PLC signal value) of the changed PLC signal in the plurality of PLC signals.

Specifically, the variable PLC signal extraction process 16 compares the value (previous value) of each PLC signal recorded in the PLC signal status information 17 with the value (current value) of each PLC signal received this time, and Determine if there is a change. When there is a change, the change PLC signal extraction process 16 extracts the signal name (change PLC signal name) and the signal value (change PLC signal value) of the changed PLC signal.

The browser display update process 18 extracts from the screen information 13 the screen name and the part name associated with the PLC signal name that is the same as the changed PLC signal name extracted by the changed PLC signal extraction process 16 .

Then, the browser display update process 18 extracts the browser name associated with the extracted screen name from the browser information 15 .

In addition, the browser display update process 18 transmits the update data including the extracted part name and the extracted changed PLC signal value to the running web browser 21 corresponding to the extracted browser name.

According to the browser display update process 18, the transmitted update data is only for the data of the PLC signal that has changed. Therefore, the amount of data is extremely small. Furthermore, the update data is only transmitted by the running web browser that is displaying the HMI screen that configures the part corresponding to the changed PLC signal. Therefore, updates will not be sent to web browsers that do not require an update.

<Human Interface Terminal>

The executing web browser 21 designated as the transmission destination by the browser display update process 18 receives the update data. The web browser 21 changes the state (value, color, shape, position) of the part corresponding to the part name included in the update data according to the changed PLC signal value.

When the human-machine interface terminal 20 has a plurality of web browsers operating, the update data is processed only in the web browser 21 that is displaying the man-machine interface screen in which the components related to the update data are arranged. Therefore, the web browser 21 which is not related to the update does not perform processing, and the data processing amount of the human-machine interface terminal 20 can be reduced. By reducing the amount of data processing, the human-machine interface terminal 20 only needs to be a low-spec computer capable of operating the web browser 21 . For example, mobile terminals such as tablet devices can also monitor and control the system.

<Flow of Signal Processing>

Referring to the example shown in FIG. 4 , the flow of the signal processing of the implementation type 1 will be described.

FIG. 4 is a diagram for explaining the process of updating the state of the part G1_1 arranged on the screen G1 of the browser A1 according to the PLC signal P1_1 from the PLC2. Also, P1_1 It is a name formed by combining the output PLCID (P1) and the PLC address (1) in the G1 device list 32a of FIG. 3 .

In step S1, the variable PLC signal extraction process 16 receives a plurality of PLC signals (P1_1, P2_1, P3_1) from the PLC2.

In step S2, the variable PLC signal extraction process 16 compares the value (previous value) of each PLC signal stored in the PLC signal state information 17 with the value (current value) of each PLC signal received this time, and determine whether there is a change. When there is a change, the change PLC signal extraction process 16 extracts the changed PLC signal name and the changed PLC signal value of the changed PLC signal. In the example of FIG. 4 , the PLC signal with change is P1_1.

In step S3, the human-machine interface server application 11 updates the PLC signal value corresponding to the PLC signal name (P1_1) stored in the PLC signal state information 17 with the current value.

In step S4, the browser display update process 18 extracts the screen name (G1) and the part name (G1_1) associated with the same PLC signal name (P1_1) as the extracted changed PLC signal name from the screen information 13.

In step S5, the browser display update process 18 extracts the browser name (A1) associated with the extracted screen name (G1) from the browser information 15.

In step S6, the browser display update process 18 transmits the updated data including the extracted part name (G1_1) and the extracted changed PLC signal value to the execution corresponding to the extracted browser name (A1). The communication object that the web browser communicates with.

In step S7, the update data is sent to the browser A1 via the communication object.

After that, the browser A1 receives the updated data, and changes the state of the part G1_1 according to the changed PLC signal value. For example, the display color of the part G1_1 is changed.

As explained above, the human-machine interface server device 10 of the implementation type 1 only transmits the update data to the running web browser 21 that is displaying the human-machine interface screen that configures the parts corresponding to the changed PLC signal. That is, the human-machine interface server device 10 only needs to perform signal processing on the PLC signal that has a change in the received PLC signal. Therefore, the amount of data processing can be greatly reduced. Furthermore, the update data is not transmitted in units of human-machine interface terminals, but in units of web browsers. Therefore, when a plurality of web browsers 21 are executed on a human-machine interface terminal, the update data is only transmitted to the running web browser that is displaying the man-machine interface screen configured with the components related to the update data. twenty one. As a result, the web browser 21 which is not related to updating data will not perform processing, and the data processing amount of the human-machine interface terminal 20 can be reduced.

However, the processing when the web browser 21 is activated and when the human-machine interface screen of the web browser 21 transitions is as follows. First, when the web browser 21 is activated or when the HMI screen of the web browser 21 is transferred, the browser (eg 21a1 ) will transmit the newly opened HMI screen to the HMI server application 11 . information, the human-machine interface server application 11 will update the browser information 15 according to the information. Next, the HMI server application 11 uses the screen information 13 to extract the PLC signal required for the HMI screen. Then, the human-machine interface server application 11 obtains the value of the PLC signal required by the human-machine interface screen from the PLC signal state information 17, and transmits it to the browser.

Implementation type 2.

Next, referring to FIG. 5 to FIG. 7 , the second embodiment of the present invention will be described.

The human-machine interface server device 10 of the above-mentioned embodiment 1 performs the following processing: only transmits the update data to the web browser 21 which is displaying the part associated with the PLC signal that has changed. The above-mentioned screen information 13 is required for this processing. The screen information 13 is generated according to the device list 32 defined for each HMI screen. The device list 32 is information formed by associating the following information: the screen name of the man-machine interface screen, the part name (item name) of the part arranged on the man-machine interface screen, and the PLC signal that directly changes the state of the part the signal name. In principle, the intrinsic part names defined in the device list 32 are associated with the intrinsic PLC signals.

However, there are cases in which the state of a part arranged on a certain HMI screen is affected by the state of a part arranged in another HMI screen. For example, there is the following situation: when the signal value of the first PLC signal corresponding to the first part on the first man-machine interface screen satisfies a specific condition, the second part on the second man-machine interface screen will be set. The usage status is changed from disable (invalid) to enable (valid). This type of handling is extremely important as a safe handling for improving the safety of parts handling.

In this case, although the second component is arranged on the second man-machine interface screen, the first component is not arranged. Therefore, the device list of the second human-machine interface screen without the first component does not include the information obtained by associating the first component name with the first PLC signal name. Furthermore, the one directly related to the first PLC signal is the first component, and the second component is only indirectly related. Therefore, the device list on the second human-machine interface screen does not include the information associated with the second component and the first PLC signal name. Therefore, no update data related to the first part will be transmitted to the web browser displaying the second human-machine interface screen with the second part configured. Therefore, according to the configuration for speeding up described in Embodiment 1, there is a problem that the above-mentioned security processing cannot be realized.

In the second embodiment, a derivative device list is imported in order to be able to cope with this situation.

<SCADA Network HMI Server Device>

Referring to the example shown in FIG. 5 and FIG. 6 , the characteristic processing of the human-machine interface server application 11 in the operation of the human-machine interface server device 10 of the implementation type 2 will be described.

The configuration shown in FIG. 5 is the same as that of FIG. 2 except that the derivative device list 33 is added, and the screen information management process 12 a is provided instead of the screen information management process 12 .

The screen information management process 12a manages the screen information 13, which is formed by associating the following information: the screen name of the man-machine interface screen, the part name of the part arranged on the man-machine interface screen, The PLC signal name of the PLC signal whose state changes. The PLC signal name is, for example, a name formed by combining the output PLCID and PLC address of FIG. 6 . Each PLC signal name is a unique name in the HMI 1.

The screen information 13 is generated according to the device list 32 and the derived device list 33 defined for each screen. 6 shows an example of the device list 32, which records the G1 device list 32a of the HMI screen G1, the G2 device list 32b of the HMI screen G2, the G4 device list 32d and the derivative device list 33 of the HMI screen G4. FIG. 6 records the screen information 13 generated according to the device lists 32 and the derived device lists 33 .

Referring to the example shown in FIG. 6 , the method for generating the screen information 13 according to the device list 32 and the derived device list 33 is directed.

First, the screen information management process 12a reads the first screen device list (G1 device list 32a, G2 device list 32b), second screen device list (G4 device list 32d) and derivative device list 33.

The information constituting the device list of the first screen is formed by associating the following information: the name of the first screen of the first human-machine interface, the name of the first part of the first part arranged on the screen of the first human-machine interface, and The first PLC signal name of the first PLC signal that changes the state of the first part. For example, the G1 device list 32a in FIG. 6 includes information obtained by associating the first screen name ( G1 ), the first part name ( G1_1 ), and the first PLC signal name ( P1_1 ). Here, the first PLC signal name corresponds to a name formed by combining the output PLCID and the PLC address.

The information constituting the device list of the second screen is formed by at least associating the second screen name of the second human-machine interface screen with the second part name of the second part arranged on the second human-machine interface screen News. Preferably, the information constituting the device list on the second screen is the same as the device list on the first screen, and is information formed by associating the following information: the name of the second screen of the second man-machine interface, the name of the second screen disposed on the second man-machine The second component name of the second component in the interface screen, and the second PLC signal name of the second PLC signal that changes the state of the second component. Here, the second PLC signal name is equivalent to a name formed by combining the output PLCID and the PLC address.

For example, the G4 device list 32d in FIG. 6 includes information formed by associating the second screen name (G4), the second part name (G4_1), and the second PLC signal name (P4_1). Here, the second PLC signal name is equivalent to a name formed by combining the output PLCID and the PLC address.

The derived device list 33 is link information that links the information of one device list 32 with the information of the other device list 32 . The derivative device list 33 is information obtained by associating the second part name with the part name of the first part that affects the state of the second part. This kind of parts Information linked to each other is not included in the second screen device list. In the example of FIG. 6 , the derivative device list 33 includes information obtained by associating the second part name ( G4_1 ) with the first part name ( G1_1 ). In addition, the file name of the derived parts list 33 includes the screen name.

The screen information management process 12 a adds the first screen information, the second screen information and the additional screen information to the screen information 13 by reading the device list 32 and the derived device list 33 .

The first screen information is information formed by associating the first screen name, the first component name and the first PLC signal name.

The second screen information is information formed by at least associating the second screen name with the second component name. Preferably, the second screen information is the same as the first screen information, and is information obtained by associating the second screen name, the second component name and the second PLC signal name.

The additional screen information is information formed by associating the following information: the second screen name determined by the second screen device list; the first part name linked to the second screen name through the derivative device list 33; The first PLC signal name of the first screen device list associated with a part name. In FIG. 6, the screen information 13 includes additional screen information, which is formed by associating the following information: the second screen name (G4) of the G4 device list 32d; The first part name (G1_1) of the two part names (G4_1); and the first PLC signal name (P1_1) of the G1 device list 32a associated with the first part name (G1_1).

In this way, the screen information management process 12a uses the derivative device list 33 to copy the first screen device list (G1 device list 32a) from the first screen device list (G1 device list 32a), which affects the state of the second part (G4_1) of the second human-machine interface screen (G4). Information for a part (G1_1).

The browser display update process 18 extracts from the screen information 13 the screen name and the part name associated with the PLC signal name that is the same as the changed PLC signal name extracted by the changed PLC signal extraction process 16 .

Furthermore, the browser display update process 18 extracts the browser name associated with the extracted screen name from the browser information 15 .

Furthermore, the browser display update process 18 transmits the update data including the extracted part name and the extracted changed PLC signal value to the running web browser corresponding to the extracted browser name.

According to this process, the browser display update process 18 transmits the updated data including the first part name (G1_1) and the value of the changed PLC signal to the current display when the name of the changed PLC signal is the same as the name of the first PLC signal (P1_1). The web browser (B1) during execution of the second human-machine interface screen (G4).

<Human Interface Terminal>

The web browser (B1) in execution, which is displaying the second man-machine interface screen (G4), receives the changed PLC signal value including the first PLC signal (P1_1) that changes the state of the first part (P1_1). Updates. Then, the web browser (B1) in execution inputs the changed PLC signal value of the first PLC signal (P1_1) into a script predetermined for the state change of the second part (G4_1), and performs calculation according to the script As a result, the state of the second part ( G4_1 ) is changed.

For example, the script of the second part (G4_1) is a program that displays the value of a specific browser name when the PLC signal value of the first PLC signal (P1_1) changes, and the value is the same as that of the web browser ( When the browser names of G4) match, the use state of the second part (G4_1) is changed from disable (invalid) to enable (valid).

The web browser (A1) in execution is the same as the embodiment 1, so the description is omitted.

<Flow of Signal Processing>

Referring to the example shown in FIG. 7 , the flow of the signal processing of the implementation type 2 will be described.

7 is used to describe the process of updating the status of the component G1_1 arranged on the screen G1 of the browser A1 and updating the usage status of the component G4_1 arranged on the screen G4 of the browser B1 according to the PLC signal P1_1 from the PLC 2 map. In addition, the part G1_1 and the part G1_2 arrange|positioned on the screen G1 are buttons which can select only one of them, and it is assumed that the part G1_1 is selected.

In step S1 , the changing PLC signal extraction process 16 receives a plurality of PLC signals ( P1_1 , P2_1 , P3_1 ) from the PLC 2 .

In step S2, the variable PLC signal extraction process 16 compares the value (previous value) of each PLC signal stored in the PLC signal state information 17 with the value (current value) of each PLC signal received at the current time, and Determine if there is a change. When there is a change, the changed PLC signal extraction process 16 extracts the changed PLC signal name and the changed PLC signal value of the changed PLC signal. In the example of FIG. 7 , the PLC signal with change is P1_1.

In step S3, the human-machine interface server application 11 updates the PLC signal value corresponding to the PLC signal name (P1_1) stored in the PLC signal state information 17 with the current value.

In step S4, the browser display update process 18 extracts from the screen information 13 the screen names (G1, G4) and the part names (G1_1, G1_1).

In step S5, the browser display update process 18 extracts the browser names (A1, B1) associated with the extracted screen names (G1, G4) from the browser information 15.

In step S6, the browser display update process 18 transmits the updated data including the extracted part name (G1_1) and the extracted changed PLC signal value to the execution device corresponding to the extracted browser name (A1). A communication object that communicates with a web browser.

In step S7, the update data is sent to the running web browser A1 via the communication object.

After that, the browser A1 receives the updated data, and changes the state of the part G1_1 according to the changed PLC signal value. For example, the display color of part G1_1 changes.

Furthermore, after the processing of step S5, in step S8, the browser display update processing 18 transmits the updated data including the extracted part name (G1_1) and the extracted changed PLC signal value to the extracted browser. The communication object of the running web browser corresponding to the device name (B1).

In step S9, the update data is transmitted to the running web browser (B1) via the communication object.

After that, the web browser (B1) in execution that is displaying the second man-machine interface screen (G4) receives the changed PLC signal value including the first PLC signal (P1_1) that changes the state of the first part (P1_1) update information.

Then, the web browser (B1) in execution inputs the changed PLC signal value of the first PLC signal (P1_1) into a script predetermined for the state change of the second component (G4_1). The script is a program that changes the PLC signal value when the first PLC signal (P1_1) changes. When the value of the browser name (B1) is displayed, and the value is consistent with the browser name of the web browser (B1) in execution, the use state of the second component (G4_1) is changed from disable (invalid) to enable ( efficient).

The web browser (B1) during execution changes the state of the second part (G4_1) according to the calculation result of the script with the changed PLC signal value as the input value. In the example of FIG. 7, the lock release condition is satisfied, and the use state of the second part (G41) is changed from disable (invalid) to enable (valid).

As described above, according to the human-machine interface server device 10 and the human-machine interface terminal 20 of the second embodiment, the state of a component in a certain human-machine interface screen can be changed according to the state of the component in another screen. Therefore, according to the system of Embodiment 2, the above-mentioned security processing can be realized while adopting the configuration for speeding up described in Embodiment 1. Furthermore, by using the derived device list 33, since the information of the linked device list can be copied and added to the screen information, the efficiency of the design operation can be improved.

<Example of hardware configuration>

FIG. 8 is a block diagram showing an example of the hardware configuration of the human-machine interface server device 10 and the human-machine interface terminal 20 .

Each processing of the human-machine interface server device 10 described above is realized by a processing circuit. The processing circuit is formed by connecting the processor 10a, the memory 10b and the network interface 10c. The processor 10a implements various functions of the human-machine interface server device 10 by executing various programs stored in the memory 10b. The network interface 10c is a device that is connected to the PLC2 and the human-machine interface terminal 20 via a computer network, and can transmit and receive PLC signals and control commands.

Each processing of the human-machine interface terminal 20 described above is realized by a processing circuit. The processing circuit is composed of the processor 20a, the memory 20b, the network interface 20c, the input interface 20d and the One less display 20e is connected and configured. The processor 20a implements various functions of the human-machine interface terminal 20 by executing various programs stored in the memory 20b. The network interface 20c is connected to the human-machine interface server device 10, and can transmit and receive PLC signals and control commands. The input interface 20d is an input device such as a keyboard, a mouse, and a touch panel. A plurality of display units 20e may be provided. In addition, the human-machine interface terminal 20 may also be a mobile terminal such as a tablet device.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be implemented within a scope that does not depart from the gist of the present invention.

2: PLC

10: Human-machine interface server device

11: HMI Server Application

12: Screen information management and processing

13: Screen information

14: Browser information management processing

15: Browser Information

16: Change PLC signal extraction processing

17: PLC signal status information

18: Browser display update processing

20A: Human-Machine Interface Terminal

20B: Human-Machine Interface Terminal

21a1: Web browsers

21a2: Web browsers

21b1: Web browsers

31: Screen information

32: Device List

Claims (3)

A SCADA network human-machine interface server device is connected with a human-machine interface terminal and a programmable logic controller (PLC). The above-mentioned human-machine interface screen is equipped with parts showing the status of the factory, the above-mentioned SCADA network human-machine interface server device transmits update data for updating the status of the above-mentioned parts according to the PLC signal received from the above-mentioned PLC, and the above-mentioned SCADA The network human-machine interface server device is provided with: at least one processor; and a memory for storing a program; the program is executed by the at least one processor, so that the at least one processor executes processing including the following processing: screen The information management process is to manage screen information, and the above-mentioned screen information is obtained by associating the following information: the screen name of the above-mentioned human-machine interface screen, the part name of the above-mentioned part arranged on the above-mentioned human-machine interface screen, and the name of the above-mentioned part. The PLC signal name of the aforementioned PLC signal whose status has changed; the browser information management process is to manage browser information, and the aforementioned browser information is the browser name of the web browser in execution, and the browser name displayed on the web browser in execution. The above-mentioned picture name of the above-mentioned human-machine interface screen is associated with the above-mentioned; the change PLC signal extraction process is to receive a plurality of PLC signals from the above-mentioned PLC, and extract the changed PLC signal name of the changed PLC signal in the above-mentioned plurality of PLC signals and changing the PLC signal value; and The browser display update processing is to extract the above-mentioned screen name and the above-mentioned part name associated with the PLC signal name that is the same as the above-mentioned changed PLC signal name from the above-mentioned screen information, and extract from the above-mentioned browser information. browser name, and send the update data including the extracted component name and the changed PLC signal value to the running web browser corresponding to the extracted browser name. The SCADA network human-machine interface server device according to claim 1, wherein the screen information management process reads a first screen device list, a second screen device list, and a derivative device list; the first screen device list The following information is associated with: the first screen name of the first man-machine interface screen, the first part name of the first part arranged on the first man-machine interface, and the state of the first part is changed The first PLC signal name of the first PLC signal; the second screen device list is a series of at least the second screen name of the second man-machine interface screen and the second part of the second man-machine interface screen. The one created by the association of two part names; the aforesaid derivative device list is created by associating the second part name with the first part name of the first part that affects the state of the second part ; The above-mentioned screen information management process is to add additional screen information to the above-mentioned screen information, and the above-mentioned additional screen information is formed by associating the following information: the above-mentioned second screen name, and the above-mentioned second part name through the above-mentioned derivative device list. the first part name, and the first PLC signal name of the first screen device list associated with the first part name; When the name of the changed PLC signal is the same as the name of the first PLC signal, the browser display update process transmits the update data including the first part name and the changed PLC signal value to the second HMI that is displaying the above The running web browser of the interface screen. The SCADA network human-machine interface server device according to claim 2, wherein the running web browser that is displaying the second human-machine interface screen receives the update data, and the update data includes making the first zero The changed PLC signal value of the first PLC signal of the state change of the component is input, and the changed PLC signal value of the first PLC signal is input into the script predetermined for the state change of the second component, and according to the script As a result of the calculation, the state of the second component is changed.

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