WO2023044929A1

WO2023044929A1 - Method and system for providing service associated with information system

Info

Publication number: WO2023044929A1
Application number: PCT/CN2021/121098
Authority: WO
Inventors: 杨晓波; 李冬; 康尧磊; 张传雨; 熊磊
Original assignee: 西门子股份公司; 西门子（中国）有限公司
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2023-03-30
Also published as: CN117980835A

Abstract

Provided in the embodiments of the present disclosure are a method and system for providing a service associated with an external information system. An exemplary method comprises: at a control device, during the execution of an industrial process, initiating a first request for a service associated with an information system outside the control device; at the control device, sending, to a host device and by means of a field bus, a first message which indicates the first request; at the control device, receiving, from the host device and by means of the field bus, a second message which indicates call feedback for the service, so as to acquire the call feedback; and at the control device, executing the industrial process on the basis of the call feedback. By means of the method in the embodiments of the present disclosure, there is no need to purchase an additional physical device to be connected to an external information system or to upgrade a conventional control device, and any required service is provided to a control device by means of only a host device, thereby reducing the cost and more flexibly providing a service.

Description

Method and system for providing services associated with an information system

technical field

The present invention relates to the field of industrial control, and more particularly, to methods and systems for providing information systems, control devices, host devices, computing devices, computer readable storage media and computer program products.

Background technique

In the industrial field, there are naturally various differences between Information Technology (IT) and Operation Technology (OT). For a long time, IT and OT have been isolated from each other. With the development of industrial informatization and digitalization, this gap between IT and OT has hindered the progress of the manufacturing industry.

With the advent of Industry 4.0, more and more enterprises have begun to introduce IT technology into OT technology. Introducing these new IT technologies into the OT field requires enhancing the capabilities of control devices (such as PLC control devices) in the industrial field to enable them to invoke IT services.

In the prior art, a solution is as disclosed in Chinese utility model patents CN205490628U and CN207039641U, through physical gateway (for example, PLC (programmable controller) gateway) and interface protocol conversion (for example, serial port to different network interface conversion) to realize the connection between the PLC control equipment and the external Internet. This solution requires additional equipment to connect the PLC control equipment to the Internet and increases the cost. It also requires adding power to these equipment and adjusting the network layout of these equipment.

In the prior art, another solution is to realize the communication between the control application running on the software-enabled control system and the IT service installed on the host system through a hardware-supported shared memory approach. This solution needs to deploy the control system and the host system on the same device hardware, and is not suitable for traditional control devices that do not support this shared memory method, such as following the tradition of IEC61131-3 using programming languages such as ST language to program PLC control device (for example, Siemens' S7-1200 PLC controller device).

Therefore, an improved solution for invoking external IT services is urgently needed.

Contents of the invention

In the existing technology, in order to obtain IT services, the control device needs an additional physical gateway or the control system and the host system need to be deployed on the same device hardware and support the shared memory method. However, this requires additional physical devices to increase the cost or is not applicable than traditional control equipment. In view of this, the present invention proposes a solution for providing services associated with information systems.

A first embodiment of the present disclosure proposes a method for providing a service associated with an information system, the method including:

Initiating, at a control device during execution of an industrial process, a first request for a service associated with an information system external to said control device;

at the control device, sending a first message indicating the first request to a host device via a fieldbus, wherein both the control device and the host device are connected to the fieldbus;

receiving, at the control device, a second message indicating invocation feedback for the service from the host device over the fieldbus to obtain the invocation feedback; and

At the control device, the industrial process is executed based on the call feedback.

A second embodiment of the present disclosure proposes a method for providing a service associated with an information system, the method including:

At a host device, a first message is received from a control device over a fieldbus indicating a first request for a service associated with an information system external to the control device, wherein the host device and The control devices are all connected to the field bus;

invoking the service by the host device in response to the first request to obtain invocation feedback for the service; and

At the host device, a second message indicating the call feedback is sent to the control device via the fieldbus.

A third embodiment of the present disclosure proposes a control device, which includes:

a requesting unit configured to initiate a first request for a service associated with an information system external to the control device during execution of an industrial process by the control device;

a sending unit configured to send a first message indicating the first request to a host device via a field bus, wherein both the control device and the host device are connected to the field bus;

a receiving unit configured to receive a second message indicating an invocation feedback for the service from the host device through the field bus to acquire the invocation feedback;

An execution unit configured to execute the industrial process based on the call feedback.

A fourth embodiment of the present disclosure proposes a host device, which includes:

a receiving unit configured to receive a first message from a control device via a fieldbus indicating a first request for a service associated with an information system external to the control device, wherein the host device and said control device are both connected to said fieldbus;

an invoking unit configured to invoke the service in response to the first request, so as to obtain an invocation feedback for the service; and

A sending unit configured to send a second message indicating the call feedback to the control device through the field bus.

A fifth embodiment of the present disclosure proposes a system for providing services associated with an external information system, the system including:

PLC control equipment and host equipment are respectively connected to the field bus;

in,

at said control device, initiating a first request for a service associated with an information system external to said control device during execution of an industrial process;

at the control device, sending a first message indicating the first request to a host device via the fieldbus;

at the host device, receiving the first message from the control device over the fieldbus;

invoking the service by the host device in response to the first request to obtain invocation feedback for the service;

at the host device, sending a second message indicating the call feedback to the host device via the field bus;

at the control device, receiving the second message from the host device over the fieldbus to obtain the call feedback; and

A sixth embodiment of the present disclosure proposes a computing device, which includes:

processor; and

The memory is used to store computer-executable instructions, which, when executed, cause the processor to execute the method according to the aforementioned first or second embodiment.

A seventh embodiment of the present disclosure proposes a computer-readable storage medium having stored thereon computer-executable instructions for performing the above-mentioned first or second The method described in the examples.

An eighth embodiment of the present disclosure proposes a computer program product that is tangibly stored on a computer-readable storage medium and includes computer-executable instructions that, when executed, cause at least A processor executes the method according to the aforementioned first or second embodiment.

As can be seen from the above scheme, because the present invention connects the control device and the host device by using the field bus to obtain external IT services from the host device, the control device does not need to care whether it is directly connected to the service providing device, and can dynamically add or Remove services without changing the layout of the fieldbus network. In addition, this solution eliminates the need to purchase additional physical equipment to connect to external information systems or upgrade legacy control equipment, and only needs to provide any required IT services to the control equipment through the host equipment, thereby reducing costs and improving Provide IT services flexibly.

Description of drawings

The features, advantages and other aspects of the various embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings, which show several embodiments of the present disclosure by way of illustration and not limitation. In the attached picture:

FIG. 1 illustrates an exemplary system for providing services associated with an information system according to an embodiment of the present disclosure.

FIG. 2 shows a flowchart of an exemplary method for providing services associated with an information system, according to an embodiment of the present disclosure.

FIG. 3 shows a flowchart of another exemplary method for providing services associated with an information system according to an embodiment of the present disclosure.

Fig. 4 illustrates an exemplary control device according to an embodiment of the present disclosure.

Figure 5 illustrates an exemplary host device according to an embodiment of the present disclosure.

FIG. 6 illustrates an exemplary information flow for providing services associated with an information system, according to an embodiment of the present disclosure.

FIG. 7 shows a block diagram of an exemplary computing device according to an embodiment of the disclosure.

Wherein, the reference signs are as follows:

100 systems

110 control equipment

120 host equipment

130 Fieldbus

140 first server

150 second server

160 third server

200 methods

201 steps

202 steps

203 steps

204 steps

300 method

301 steps

302 steps

303 steps

400 host devices

401 Request Unit

402 sending unit

403 receiving unit

404 execution unit

500 host devices

501 receiving unit

502 call unit

503 sending unit

600 information flow

601 control equipment

602 host device

603 Service Provider Equipment

610 initiates a first request for a service of an external information system

620 sends a first message indicating the first request

630 receiving the first message

640 call service

650 process service request

660 return call feedback

670 sends a second message indicating the call feedback

680 receives the second message

700 computing devices

701 processor

702 memory

Detailed ways

Various exemplary embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. While the example methods, apparatus described below include software and/or firmware executing on hardware, among other components, it should be noted that these examples are illustrative only and should not be viewed as limiting. For example, it is contemplated that any or all hardware, software, and firmware components may be implemented exclusively in hardware, exclusively in software, or in any combination of hardware and software. Therefore, although exemplary methods and apparatuses have been described below, those skilled in the art will readily understand that the examples provided are not intended to limit the manner in which these methods and apparatuses are implemented.

Furthermore, the flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of methods and systems according to various embodiments of the present disclosure. It should be noted that the functions noted in the block may also occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. It should also be noted that each block in the flowchart and/or block diagrams, and combinations of blocks in the flowchart and/or block diagrams, can be implemented using a dedicated hardware-based system that performs the specified functions or operations , or can be implemented using a combination of dedicated hardware and computer instructions.

The terms "including", "comprising" and similar terms used herein are open-ended terms, that is, "including/including but not limited to", which means that other contents may also be included. The term "based on" is "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one further embodiment" and so on.

In this application, a service refers to a function provided by a software program or application running in an information system.

As mentioned above, in order to obtain IT services in the prior art, an additional physical gateway device is required to connect the control device to the Internet, or the control system and the host system need to be deployed on the same device hardware and obtain IT services through shared memory , however this adds additional cost and requires adjustments to the network layout, or is not suitable for traditional types of control devices. In view of this, the present invention provides a solution for providing services associated with an information system through a fieldbus to solve the above-mentioned defects in the prior art.

FIG. 1 illustrates an exemplary system 100 for providing services associated with an information system, according to an embodiment of the present disclosure. The system 100 includes a control device 110 and a host device 120 , which are respectively connected to a field bus 130 . The control device 110 may be used to execute an industrial process and may need to access services associated with external information systems during the execution of the industrial process. Control device 110 may send a request for service to host device 120 via fieldbus 130 . The host device 120 can act as a proxy device for the service, and dispatch the corresponding service in response to the received request, and send the call feedback to the control device 110 through the field bus 130, so that the control device 110 can perform industrial operations according to the returned call feedback. process. In some cases, the invoked service may be provided directly by host device 120, and thus, host device 120 may invoke the service locally to obtain invocation feedback. In some cases, the invoked service cannot be directly provided by the host device 120, then the host device 120 can seek to provide services to other devices, such as shown in FIG. (e.g., via wired, wireless, and/or combined communication links) a plurality of server devices—a first server 140, a second server 150, a third server 160 (for illustration only, not limitation), and to These server devices request calling services to obtain calling feedback, and send the calling feedback to the control device 110 through the field bus 130, so that the control device 110 can execute the industrial process according to the returned calling feedback. For example, the communication link between the host device 120 and other

service providing devices

140 , 150 and 160 is different from a field bus, and standard IT services can be provided through common TCP/IP or UDP on this communication link.

In addition, it should be understood that the number of control devices, host devices, and servers in FIG. 1 is only for illustration, and there may be more control devices, more host devices, or more or fewer servers. For example, one or more control devices may obtain external services through one or more fieldbuses via one or more host devices, and the services may be provided by one or more host devices or other servers.

Although industrial fieldbus is usually not designed for IT service communication, and its communication protocol stack is incomplete or even modified, making fieldbus often unable to provide standard IT services through common TCP/IP or UDP methods, but through The field bus sends a service request to the host device, and the host device returns a call feedback about the service, so that the control device can easily obtain standard IT services.

The information interaction process between the control device 110 and the host device 120 in the system 100 will be further described in detail below with reference to FIGS. 2-6 .

FIG. 2 shows a flowchart of an exemplary method 200 for providing services associated with an information system, according to an embodiment of the present disclosure. The method 200 can be implemented, for example, by the control device 110 of FIG. 1 .

Referring to FIG. 2 , method 200 starts at step 201 . In step 201 , at the control device 110 , a first request for a service associated with an information system external to the control device 110 is initiated during execution of an industrial process. For example, the control device 110 is limited by its own processing capability, and may need to call external services (for example, services of big data applications provided by a big data server, services of query applications provided by a database device, etc.) during the execution of an industrial process, At this time, the control device 110 may initiate a first request for an external service.

Next, the method 200 proceeds to step 202 . In step 202 , at the control device 110 , a first message indicating a first request is sent to the host device 120 via the fieldbus 130 . For example, the control device 110 may have a communication interface that can directly transmit data on the fieldbus 130, or the control device 110 may be configured with a fieldbus driver or a bus adapter to transmit data on the fieldbus 130 through the communication interface.

Next, the method 200 proceeds to step 203 . In step 203, at the control device 110, a second message indicating an invocation feedback for the service is received from the host device 120 through the fieldbus 130 to obtain the invocation feedback. For example, host device 120 can be equipped with a communication interface that can transmit data directly on fieldbus 130 in order to exchange data with control device 110 .

Next, the method 200 proceeds to step 204 . In step 204, the industrial process is executed based on the call feedback.

Different from the prior art, the present invention obtains external IT services from the host device by using the field bus to connect the control device and the host device, so that the control device does not need to care whether it is directly connected to the service providing device, and can dynamically add or remove services Without changing the layout of the fieldbus network. In addition, this solution eliminates the need to purchase additional physical equipment to connect to external information systems or upgrade legacy control equipment, and only needs to provide any required IT services to the control equipment through the host equipment, thereby reducing costs and improving Provide IT services flexibly.

In some embodiments, the first request may include a service name and parameters for the service. The service name is used to identify the requested service, and the parameters are, for example, entry parameters required by the service.

In some embodiments, step 202 may include: encoding the first request in a first message, wherein the first message follows the data format of the communication protocol of the field bus 130; and sending the second request according to the communication protocol of the field bus 130 a message. For example, the control device 601 may serialize the service name and parameters to generate or encode a byte group, and encapsulate the coded byte group in the first message according to the data format of the fieldbus communication protocol. In addition, the control device 601 and the host device 602 may also negotiate the rules of data transmission (for example, byte order, etc.) in advance, and use the rules for configuration.

In some embodiments, the invocation feedback may include the service name of the service and the invocation result. The service name is used to identify the requested service, and the result of the call is, for example, the data required for further execution of the industrial process.

In some embodiments, step 203 may include: receiving the second message according to the communication protocol of the fieldbus 130, wherein the second message complies with the data format of the communication protocol of the fieldbus 130; and decoding the second message to obtain call feedback. For example, the control device 110 may receive the second message according to the communication protocol of the field bus, extract the byte group corresponding to the call feedback from the second message, and decode the byte group by, for example, deserializing the byte group. Service name and call result.

In some embodiments, the control device 110 may include a PLC control device, or other control devices with limited functions, such as various traditional programmable control devices. This enables easy access to external IT services even for control devices with limited functionality.

In some embodiments, the fieldbus may include at least one of the following types: EtherCAT, PROFIBUS, PROFINET, Foundation Fieldbus, or Modbus. These types of fieldbuses can be various high-speed fieldbuses to meet the real-time requirements required by industrial processes.

FIG. 3 shows a flowchart of another exemplary method 300 for providing services associated with an information system according to an embodiment of the present disclosure. Method 300 may be implemented, for example, by host device 120 of FIG. 1 .

Referring to FIG. 2 , method 300 starts at step 301 . In step 301 , at the host device 120 a first message is received from the control device 110 via the fieldbus 130 indicating a first request for a service associated with an information system external to the control device 110 .

Next, the method 300 proceeds to step 302 . In step 302, the host device 120 invokes the service in response to the first request to obtain invocation feedback for the service.

Next, the method 300 proceeds to step 303 . In step 303, at the host device 120, a second message indicating to invoke feedback is sent to the control device 110 through the field bus 130.

In some embodiments, the first request includes a service name and parameters for the service. The service name is used to identify the requested service, and the parameters are, for example, entry parameters required by the service.

In some embodiments, step 301 may include: receiving the first message according to the communication protocol of the fieldbus 130, wherein the first message follows the data format of the communication protocol of the fieldbus 130; and decoding the first message to obtain the first request. For example, the host device 120 may receive the first message according to the communication protocol of the field bus, and extract the byte group corresponding to the first request from the first message, and decode the byte group by, for example, deserializing the byte group Make the first request.

In some embodiments, step 302 may include: determining whether the host device 120 can directly provide the service; if the host device 120 can directly provide the service, calling the service locally at the host device 120 to obtain a call feedback, or if the host device 120 can directly provide the service If the device 120 fails to provide the service directly, the host device 120 requests the service providing device capable of providing the service to call the service, so as to obtain the call feedback. For example, host device 120 may determine whether it can directly provide the service based on, for example, the service name, and if the service cannot be provided directly, host device 120 may determine from the service name (and optionally, routing information) the service it is connected to. The service providing device (for example, server 140-160) that can provide the service, and request invoking service to the service providing device, for example, can request invoking service through HTTP, TCP/IP, UDP, RPC or other various possible ways to get call feedback.

In some embodiments, step 303 may include: encoding the call feedback into a second message, wherein the second message follows the data format of the communication protocol of the fieldbus 130; sending the second message according to the communication protocol of the fieldbus 130 . For example, the host device 120 may perform serialization on the service name and the call result to generate or encode a byte group, and encapsulate the coded byte group in the second message according to the data format of the fieldbus communication protocol.

FIG. 4 illustrates an exemplary control device 300 according to an embodiment of the present disclosure. The control device 300 includes a request unit 401 , a sending unit 402 , a receiving unit 403 and an execution unit 404 .

The request unit 401 is configured to initiate a first request for a service associated with an information system external to the control device during execution of the industrial process.

The sending unit 402 is configured to send the first message indicating the first request to the host device through the field bus, wherein both the control device and the host device are connected to the field bus.

The receiving unit 403 is configured to receive the second message indicating the call feedback for the service from the host device through the field bus to obtain the call feedback.

The execution unit 404 is configured to execute the industrial process based on the call feedback.

In some embodiments, the first request includes a service name and parameters for the service.

In some embodiments, the sending unit 402 may be configured to: encode the first request in the first message, wherein the first message follows the data format of the fieldbus communication protocol; and send the first request according to the fieldbus communication protocol. information.

In some embodiments, the invocation feedback includes a service name of the service and an invocation result.

The receiving unit 403 may be configured to: receive the second message according to the communication protocol of the field bus, wherein the second message complies with the data format of the communication protocol of the field bus; and decode the second message to obtain the calling feedback.

In some embodiments, the control device 300 may include a PLC control device, or other control devices with limited functions, such as various traditional programmable control devices.

In some embodiments, the fieldbus may include at least one of the following types: EtherCAT, PROFIBUS, PROFINET, Foundation Fieldbus, or Modbus.

FIG. 5 illustrates an exemplary host device 500 according to an embodiment of the disclosure. The host device 500 includes a receiving unit 501 , a calling unit 502 and a sending unit 503 .

The receiving unit 501 is configured to receive a first message indicating a first request from the control device through the field bus, the first request is for a service associated with an information system outside the control device, wherein both the host device and the control device are connected to Fieldbus.

The calling unit 502 is configured to call a service in response to the first request, so as to obtain a call feedback for the service.

The sending unit 503 is configured to send the second message indicating invoking feedback to the control device through the field bus.

In some embodiments, the receiving unit 501 may be configured to: receive the first message according to the communication protocol of the field bus, wherein the first message follows the data format of the communication protocol of the field bus; and decode the first message to obtain the first request .

In some embodiments, the calling unit 502 may be configured to: determine whether the host device can directly provide the service; if the host device can directly provide the service, call the service locally at the host device to obtain the call feedback, or if the host device If the service cannot be directly provided, the host device requests the service providing device capable of providing the service to call the service, so as to obtain the call feedback.

In some embodiments, the invocation feedback may include service name and invocation result.

In some embodiments, the sending unit 503 may be configured to: encode the call feedback into the second message, wherein the second message follows the data format of the fieldbus communication protocol; and send the second message according to the fieldbus communication protocol .

FIG. 6 shows an exemplary information flow 600 for providing services associated with an information system according to an embodiment of the present disclosure. The information flow 600 depicts an information exchange process. For example, the control device 601 may be the control device 110 of FIG. 1 or the control device 400 of FIG. 4, the host device 602 may be the host device 120 of FIG. 1 or the host device 500 of FIG. devices, such as host device 602, any one of server devices 140-160 in FIG. 1 .

When the control device 601 executes an industrial process in an industrial or process control system, it needs to request an external IT service, so it initiates (610) a first request about the external service, and the first request may include a service name and parameters.

Next, the control device 601 sends (620) a first message to the host device 602 via the fieldbus, wherein the first request is encoded in the first message. For example, the control device 601 may serialize the service name and parameters to generate or encode a byte group, and encapsulate the coded byte group in the first message according to the data format of the communication protocol of the field bus, and follow the The communication protocol of the field bus sends the first message.

Next, the host device 602 receives (630) the first message over the Fieldbus. For example, the host device 602 may receive the first message according to the communication protocol of the field bus, and extract the byte group corresponding to the first request from the first message, and decode the byte group by, for example, deserializing the byte group Make the first request.

Next, host device 602, in response to the first request, invokes (640) the service for which the first request is directed.

In some cases, when the host device 602 can determine that it can directly provide the service according to the service name, for example, the service providing device 603 is the host device 602, which processes (650) the service request and returns (660) the call feedback, wherein , the call feedback can include the service name and call result.

In other cases, when the host device 602 can determine that it cannot directly provide the service according to the service name, for example, the service providing device 603 is different from the host device 602, and the host device 602 can use the service name (and optionally , routing information) to determine the service providing device 603 that it is connected to that can provide services, and request the service providing device 603 to call (640) the service, for example, through HTTP, TCP/IP, RPC or other possible way to request a service call. The service providing device 603 processes (650) the service request, and returns (660) an invocation feedback to the host device 602, wherein the invocation feedback may include a service name and an invocation result.

Next, the host device 602 sends (670) a second message to the control device 601 via the fieldbus, wherein the call feedback is encoded in the second message. For example, the host device 602 may serialize the service name and the call result to generate or encode a byte group, and encapsulate the coded byte group in the second message according to the data format of the fieldbus communication protocol, and The second message is sent according to the communication protocol of the field bus.

Next, the control device 601 receives (680) a second message via the fieldbus. For example, the control device 601 may receive the second message according to the communication protocol of the field bus, and extract the byte group corresponding to the call feedback from the second message, and decode the byte group by, for example, deserializing the byte group Call for feedback.

A specific example about FIG. 6 is given below to provide a better understanding of the present invention. For example, the control device 601 executes an industrial process having multiple stages, where each stage corresponds to a respective set of process parameters. The control device 601 can obtain the process parameter set of each stage in multiple time periods, and send the process parameter set to the host device 602 through the field bus, and the host device 602 provides the process parameter set to the operation analysis application (for example, big data Analysis application) service providing device 603 or the host device 602 itself, the analysis application can build an analysis model based on the set of process parameters under normal conditions about each stage obtained in the past time period. In order to call the analysis application to determine whether the execution of the current stage is normal, the control device 601 may send a first message to the host device 602 through the field bus, the first message indicating a first request about the analysis application. In response to receiving the first request, the host device 602 may invoke the analysis application by the service providing device 603 or the host device 602 itself, and use the established analysis model to analyze the process parameter set of each stage acquired in the current time period, To determine whether the execution of this stage is abnormal, and the host device 602 codes the analysis result as a call feedback in the second message and sends it back to the control device 601 via the field bus, so that the control device 601 can execute according to the analysis result (for example, Stop the current stage, troubleshoot the current stage, or continue to the next stage) of the industrial process.

FIG. 7 shows a block diagram of an exemplary computing device 700 for providing services associated with an information system, according to an embodiment of the disclosure. The computing device 700 includes a processor 701 and a memory 702 coupled with the processor 701 . The memory 702 is used for storing computer-executable instructions, and when the computer-executable instructions are executed, the processor 701 executes the methods in the above embodiments (for example, any one or more steps in the foregoing method 200 or 300).

In addition, alternatively, the above method can be implemented by a computer-readable storage medium. A computer-readable storage medium carries computer-readable program instructions for implementing various embodiments of the present disclosure. A computer readable storage medium may be a tangible device that can retain and store instructions for use by an instruction execution device. A computer readable storage medium may be, for example, but is not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of computer-readable storage media include: portable computer diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or flash memory), static random access memory (SRAM), compact disc read only memory (CD-ROM), digital versatile disc (DVD), memory stick, floppy disk, mechanically encoded device, such as a printer with instructions stored thereon A hole card or a raised structure in a groove, and any suitable combination of the above. As used herein, computer-readable storage media are not to be construed as transient signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., pulses of light through fiber optic cables), or transmitted electrical signals.

Accordingly, in another embodiment, the present disclosure provides a computer-readable storage medium having computer-executable instructions stored thereon for performing various implementations of the present disclosure. method in the example.

In another embodiment, the present disclosure provides a computer program product tangibly stored on a computer-readable storage medium and comprising computer-executable instructions that, when executed, cause At least one processor executes the methods in various embodiments of the present disclosure.

In general, the various example embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, firmware, logic, or any combination thereof. Certain aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be executed by a controller, microprocessor or other computing device. When aspects of the embodiments of the present disclosure are illustrated or described as block diagrams, flowcharts, or using some other graphical representation, it is to be understood that the blocks, devices, systems, techniques, or methods described herein may serve as non-limiting Examples are implemented in hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controllers or other computing devices, or some combination thereof.

The computer-readable program instructions or computer program products used to execute various embodiments of the present disclosure can also be stored in the cloud, and when called, the user can access the program stored on the cloud for execution through the mobile Internet, fixed network or other networks. The computer-readable program instructions of an embodiment of the present disclosure implement the technical solutions disclosed in accordance with various embodiments of the present disclosure.

While embodiments of the present disclosure have been described with reference to several specific embodiments, it is to be understood that the embodiments of the present disclosure are not limited to the specific embodiments disclosed. Embodiments of the present disclosure are intended to cover various updates and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the claims is accorded the broadest interpretation to encompass all such modifications and equivalent structures and functions.

Claims

Methods for providing services associated with information systems, including:

Initiating, at a control device during execution of an industrial process, a first request for a service associated with an information system external to said control device;

at the control device, sending a first message indicating the first request to a host device via a fieldbus, wherein both the control device and the host device are connected to the fieldbus;

receiving, at the control device, a second message indicating invocation feedback for the service from the host device over the fieldbus to obtain the invocation feedback; and

At the control device, the industrial process is executed based on the call feedback.
The method of claim 1, wherein the first request includes a service name and parameters of the service.
The method according to claim 1 or 2, wherein sending the first message indicating the first request to the host device comprises:

encoding the first request in the first message, wherein the first message complies with the data format of the communication protocol of the field bus; and

The first message is sent according to the communication protocol of the field bus.
The method according to claim 1, wherein the invocation feedback includes a service name of the service and an invocation result.
The method of claim 1 or 4, wherein receiving a second message from the host device indicating invocation feedback for the service to obtain the invocation feedback comprises:

receiving the second message according to the communication protocol of the field bus, wherein the second message follows the data format of the communication protocol of the field bus; and

Decoding the second message to obtain the call feedback.
The method of claim 1, wherein the control device comprises a PLC control device.
The method of claim 1, wherein the field bus comprises at least one of the following types:

EtherCAT, PROFIBUS, PROFINET, Foundation Fieldbus, or Modbus.
Methods for providing services associated with information systems, including:

At a host device, a first message is received from a control device over a fieldbus indicating a first request for a service associated with an information system external to the control device, wherein the host device and The control devices are all connected to the field bus;

invoking the service by the host device in response to the first request to obtain invocation feedback for the service; and

At the host device, a second message indicating the call feedback is sent to the control device via the fieldbus.
The method of claim 8, wherein receiving the first message from the control device indicating the first request comprises:

receiving the first message according to the communication protocol of the field bus, wherein the first message follows the data format of the communication protocol of the field bus; and

The first message is decoded to obtain the first request.
The method of claim 8, wherein invoking the service in response to the first request to obtain invocation feedback for the service comprises:

determining whether the host device can directly provide the service;

If the host device can directly provide the service, invoking the service locally at the host device to obtain the invocation feedback, or

If the host device fails to directly provide the service, the host device requests a service providing device capable of providing the service to call the service, so as to obtain the call feedback.
The method of claim 8, wherein sending the second message indicating the invocation feedback to the host device comprises:

Encoding the calling feedback in the second message, wherein the second message follows the data format of the communication protocol of the field bus;

The second message is sent according to the communication protocol of the field bus.
Control equipment, including:

a requesting unit configured to initiate a first request for a service associated with an information system external to said control device during execution of an industrial process;

a sending unit configured to send a first message indicating the first request to a host device via a field bus, wherein both the control device and the host device are connected to the field bus;

a receiving unit configured to receive a second message indicating an invocation feedback for the service from the host device through the field bus to obtain the invocation feedback; and

An execution unit configured to execute the industrial process based on the call feedback.
The control device according to claim 12, wherein the first request includes a service name and parameters of the service.
The control device according to claim 12 or 13, wherein the sending unit is configured to:

encoding the first request in the first message, wherein the first message complies with the data format of the communication protocol of the field bus; and

The first message is sent according to the communication protocol of the field bus.
The control device according to claim 12, wherein the invocation feedback includes a service name of the service and an invocation result.
The method according to claim 12 or 15, wherein the receiving unit is configured to:

receiving the second message according to the communication protocol of the field bus, wherein the second message follows the data format of the communication protocol of the field bus; and

Decoding the second message to obtain the call feedback.
The control device of claim 12, wherein the control device comprises a PLC control device.
The control device of claim 12, wherein the field bus comprises at least one of the following types:

EtherCAT, PROFIBUS, PROFINET, Foundation Fieldbus, or Modbus.
Host devices, including:

a receiving unit configured to receive a first message from a control device via a fieldbus indicating a first request for a service associated with an information system external to the control device, wherein the host device and said control device are both connected to said fieldbus;

an invoking unit configured to invoke the service in response to the first request, so as to obtain an invocation feedback for the service; and

A sending unit configured to send a second message indicating the call feedback to the control device through the field bus.
The host device according to claim 19, wherein the receiving unit is configured to:

receiving the first message according to the communication protocol of the field bus, wherein the first message follows the data format of the communication protocol of the field bus; and

The first message is decoded to obtain the first request.
The host device according to claim 19, wherein the calling unit is configured to:

determining whether the host device can directly provide the service;

If the host device can directly provide the service, invoking the service locally at the host device to obtain the invocation feedback, or

If the host device fails to directly provide the service, the host device requests a service providing device capable of providing the service to call the service, so as to obtain the call feedback.
The host device according to claim 19, wherein the sending unit is configured to:

Encoding the call feedback in the second message, wherein the second message complies with the data format of the communication protocol of the field bus; and

The second message is sent according to the communication protocol of the field bus.
Systems used to provide services associated with external information systems, including:

The control device and the host device are respectively connected to the field bus;

in,

at said control device, initiating a first request for a service associated with an information system external to said control device during execution of an industrial process;

at the control device, sending a first message indicating the first request to a host device via the fieldbus;

at the host device, receiving the first message from the control device over the fieldbus;

invoking the service by the host device in response to the first request to obtain invocation feedback for the service;

at the host device, sending a second message indicating the call feedback to the host device via the field bus;

at the control device, receiving the second message from the host device over the fieldbus to obtain the call feedback; and

At the control device, the industrial process is executed based on the call feedback.
Computing equipment, including:

processor; and

A memory for storing computer-executable instructions which, when executed, cause the processor to perform the method according to any one of claims 1-14.
A computer-readable storage medium having computer-executable instructions stored thereon for performing the method according to any one of claims 1-14.
A computer program product tangibly stored on a computer-readable storage medium and comprising computer-executable instructions which, when executed, cause at least one processor to perform the any one of the methods described.