CN113268884B - Asset management shell-based distributed control system management and control method - Google Patents
Asset management shell-based distributed control system management and control method Download PDFInfo
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Abstract
The invention discloses a distributed control system management and control method based on an asset management shell, and relates to the technical field of control and management model integration in an industrial system. Designing an asset management shell integrated model based on IEC 61499 standard, integrating a control model into a management model, completing an integrated model of comprehensive information, management and control, and bringing a uniform expression mode; designing a mapping rule between specific model elements, wherein the mapping rule comprises static and dynamic states, and the rationality and correctness of organization and interaction of various elements between different levels are ensured; the universal mapping structure is designed in a modular mode so as to meet the requirements of different scenes as much as possible. The method can not only establish information management models for different components in the industry, but also integrate executable system-level modeling control language, and simultaneously realize the management and control of the components.
Description
Technical Field
The invention relates to the technical field of control and management model integration in an industrial system, in particular to a distributed control system management and control method based on an asset management shell.
Background
In a new industrial innovation trend, an asset management shell is proposed and gradually applied as a core element of an underlying equipment model, and the asset management shell is a digital expression model oriented to a distributed system and exists in a form of informatization management of entities, equipment, assets and the like. However, the current asset management shell model only relates to an information management level of the underlying equipment, is disjointed from the control model, is only limited to describe the static behavior of the equipment, has defects in the aspects of flexible control and dynamic reconfiguration, needs a manager to adjust the equipment model and the control model at the same time, and is lack of portability.
In the existing method, an asset management shell is represented by an IEC 61131-3 software model, and structural mapping is performed on elements such as configuration, resources, programs, variables, semantics and the like in an IEC 61131-3 standard specification one by one, so that fusion of a traditional industrial control model and a emerging asset management model is completed. However, the IEC 61131-3 standard is a scheme only facing to a single PLC (Programmable Logic Controllers), is not suitable for a multi-device and multi-level deployment manner in a distributed system, does not bring the advantage that an asset management shell can be transplanted and reused, but makes the IEC 61131-3 standard compromise with a traditional control scheme to adapt to a previous generation industrial system.
The integration scheme based on IEC 61131-3 focuses on a single PLC and cannot realize a distributed control mode on multiple device resources. The current scheme strongly depends on a specific process flow, the upstream and downstream of the control logic of the scheme are not stripped, the scheme has no flexibility in dynamic configuration, the scheme cannot be conveniently transplanted and reused, and the workload is large for system modeling and control. The characteristics of encapsulation and flexibility of an asset management shell and a function block are not fully utilized, the integration of a control model is heavier than that of a bottom layer, and a set of full-level mapping scheme from a system, equipment to a function unit is lacked. Only static behavior is described and integration of model dynamic behavior is lacking.
Therefore, those skilled in the art are devoted to developing a distributed control system management and control method based on an asset management shell. The method can not only establish information management models for different components in the industry, but also integrate executable system-level modeling control language, and simultaneously realize the management and control of the components.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the invention is to design an asset management shell integrated model based on the IEC 61499 standard, integrate a control model into a management model, complete an integrated model of comprehensive information, management and control, bring a uniform expression mode, and reduce development workload; designing a mapping rule between specific model elements, wherein the mapping rule comprises static and dynamic states, and the rationality and correctness of organization and interaction of various elements between different levels are ensured; the universal mapping structure is designed in a modular mode so as to meet the requirements of different scenes as much as possible.
In order to achieve the above object, the present invention provides a distributed control system management and control method based on an asset management shell, which is characterized by comprising the following steps:
and 2, integrating the management model and the control model of the IEC 61499 into the asset management shell model.
Further, the system model corresponds to a management shell network of the asset management shell.
Further, the equipment model corresponds to an asset management shell.
Further, the resource model maps the Body part of the asset management shell.
Further, the application model maps a submodel (sub-model) network in the asset management shell model.
Further, the function block model maps a submodel in the asset management shell.
Further, the function block model includes a basic function block, a composite function block, and a service interface function block.
Further, the management model maps APIs defined in the asset management shell.
Further, the function block model maps a submodel element in the asset management shell.
Further, the management model maps the Component Manager in the asset management shell.
In a preferred embodiment of the present invention, the present invention relates to a method for integrating a control and management model in an industrial system, and in particular, to the integrated fusion of an IEC 61499 function block model and an asset management shell model, which aims to accomplish the autonomous management and control of a distributed control system.
The invention provides a control integration mode based on IEC 61499 standard specification aiming at the existing meta-model (meta-model) of an asset management shell. In the existing industrial system, the application of the asset management shell only stays in the fields of information acquisition, state monitoring and the like, and the application of the asset management shell is used as a basic structural unit in industry 4.0 and should be integrated into a control mode facing the next generation. Therefore, the information management model can be established for different components in the industry, an executable system-level modeling control language can be integrated, and the management and control of the components are realized.
As shown in fig. 1, a system model, an equipment model, a resource model, an application model and a function block model in IEC 61499 are integrated into an asset management shell respectively, so as to implement top-to-bottom static mapping. In IEC 61499, a system model is a device network including communication, interoperation, data transmission, and the like, which is composed of a plurality of devices related to the lower layers, and thus management is performed from the perspective of a plant or a production line subsystem in accordance with a management shell network in the concept of an asset management shell. The equipment model corresponds to the asset management shell, and the asset management shell establishes the information control model based on the equipment information, so that the equipment model is naturally integrated, and the integrated model comprises necessary components such as interfaces, resources, functional modules and the like. The resource model provides the software and hardware resources, such as infrastructure and services, that ensure proper execution of the underlying functional blocks, and in the present method, it is mapped as a container that houses the underlying control execution modules to the Body part of the asset management shell to support data processing, control, communication, etc. The application model is a network of function blocks, which may reside in one or more devices, similar to a submodel (submodel) network in the asset management shell model, and may be deployed from a software function perspective, with cooperation between different submodels in a single device or across devices. The function block model is the bottom layer and the most important concept in IEC 61499, and is the basis of the whole standard system. As a 'functional unit of software', the functional unit is packaged in a modularized mode, which is completely consistent with the concept of a submodel in an asset management shell, but the submodel is used for constructing and describing an information model aiming at the function of equipment, and the functional block focuses on specific logic implementation, so that the defect of control in the management shell model can be made up by integrating the submodel and the functional block, and the submodel is further generalized. The functional blocks are divided into three types, which are respectively: a Basic Function Block (BFB), a Composite Function Block (CFB), and a Service Interface Function Block (SIFB), which may be mapped to different elements in the submodel, respectively, as shown in fig. 2, 3, and 4.
In addition to integration for static behavior, the present invention also relates to dynamic behavior descriptions for managing and controlling inter-model components. In IEC 61499, management models (management models) are used to dynamically manage the various structures of function blocks, and these management instructions can be mapped to APIs defined in the asset management shell, as shown in FIG. 5, and each specific management instruction is mapped to a different API according to the managed object, completing a uniform adjustment of the model. After the dynamic model is integrated, the dynamic API can be used for carrying out unified adjustment and management on the structural elements, and the reconfiguration on functions and resources is completed.
For partitioning at the integration model granularity, functional blocks can be mapped to submodel elements instead of submodels, and integration can be performed at a finer granularity. However, this results in a loss of the package characteristics in the submodel, and the placement and management cannot be performed to the same extent as the function blocks.
In the aspect of dynamic model behavior, the mapped API can be replaced by the Component Manager in the asset management shell, but the Component Manager does not appear in the meta-model of the asset management shell, so the scheme has no overall consistency, only stays in concept, and cannot be embodied in the mapping between specific instructions.
The present invention provides a full-level integrated mapping of applications to function blocks from systems, devices, resources. And integrating the control model into the asset management shell model so that the control model can be managed in an information + control mode. Both static and dynamic model behavior. The first proposal combines an asset management shell model with IEC 61499 with no related work before.
Compared with the prior art, the invention has the following obvious substantive characteristics and obvious advantages:
1. the new asset management shell model is merged into IEC 61499 standard specification, and the unified expression on management and control is completed. Meanwhile, the system is more suitable for a distributed system in a modular control mode and can support the multiplexing and the transplanting of functional units.
2. By combining the submodel with the functional block, the common characteristics of encapsulation and flexibility of the submodel and the functional block can be fully exerted, and the reconfiguration process can be simplified.
3. The method comprises a static mapping model and a dynamic interaction model, and is a complete set of integrated scheme.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is an overall mapping model of a preferred embodiment of the present invention;
FIG. 2 is a basic functional block integration model of a preferred embodiment of the present invention;
FIG. 3 is a service interface function block integration model of a preferred embodiment of the present invention;
FIG. 4 is a composite function block integration model of a preferred embodiment of the present invention;
FIG. 5 is a dynamic management instruction integration in accordance with a preferred embodiment of the present invention;
FIG. 6 is an asset management shell model of a preferred embodiment of the present invention;
FIG. 7 is a Submodel element structure component of a preferred embodiment of the invention;
FIG. 8 is a main model in IEC 61499 for a preferred embodiment of the invention;
FIG. 9 is an IEC 61499 function block model of a preferred embodiment of the present invention.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
The asset management shell is an important element in an industrial 4.0 component, is a digital representation representing assets or entities, wraps industrial objects in the shell, and serves as an entity to manage the objects to form a complete component which is open to the outside and managed in the interior, so that different devices become more standard and easier to manage. The concept of the asset management shell is used as a core element, different assets can be integrated into an information world, different engineering tools can uniformly access the management shell to obtain required information, such as the structure, product information, characteristic configuration, operational instructions, production capacity and the like of the assets, and specific implementation modes of a bottom layer are not concerned any more, so that the problems of inconsistent interfaces, non-uniform standards and the like are solved, and the collaborative cooperation across the engineering field is allowed. The use of a management shell provides three advantages: scalability, unified interface, and interoperability.
The Meta-model (Meta-model) of the asset management shell divides the asset management shell into two parts, a Header and a Body, wherein the Header stores management information of the asset management shell, such as the Id of a device, the Id of the asset management shell, the version, the revision and the like. The Body part is composed of a plurality of submodels (submodels), wherein the submodels refer to aggregation with similar information, and the characteristics of the functional aspects of the components are integrated to form basic units with different functions. The architecture of a simplified meta-model is shown in fig. 6 (only the elements involved in the present invention are listed), with Submodel and Submodel element being key elements. Most of the basic elements used in fig. 2, 3 and 4 are submodel elements, so fig. 7 shows the basic composition of the submodel elements, wherein the model elements mainly used in the invention are in a dotted box.
As shown in fig. 9, the Function Block model is the most important part of the Function Block model, and may be divided into a Basic Function Block (BFB), a Composite Function Block (CFB), and a Service Interface Function Block (SIFB), where interfaces of the Function blocks include input events, output events, input variables, and output variables, and the Function blocks are associated with each other through event connections and variable connections. The basic function block internally encapsulates the Control logic by an Execution Control Chart (ECC), which is a state machine with callable functions (Algorithm) in each state, and completes state transition when a specific event occurs. Inside the composite function block is a function block network composed of basic function blocks, service interface function blocks or other composite function blocks. Inside the service interface function block, a specific function is performed by executing service sequences, each of which calls an associated interface function.
In the asset management shell model, submodels are the lowest-granularity management units, each submodel represents the description of one function set, and the information level is emphasized, so that the submodels play an important role in digital representation and technical functions; meanwhile, the function block is also the most basic function unit in the IEC 61499 control model, and focuses more on the control logic level. Therefore, the integration of the submodel and the function block lays the foundation of the whole system architecture, and the whole operation above the hierarchy is based on the structure. The function block mainly comprises a basic function block, a composite function block and a service interface function block, so that the three are integrated into an asset management shell model, a rule mapping scheme with universality can be completed, and the method can be conveniently applied to different scenes.
The integration rules of the basic function blocks are shown in FIG. 2, each block diagram represents a model element, the former representing an IEC 61499 element and the latter representing an asset management shell model element in the top name of the block diagram, e.g., BFB:: Submodel representing the mapping of the basic function block into a Submodel. Each basic functional block has both external interfaces and internal behavior. The interfaces to the basic function blocks are mainly classified into Data (Data) and events (events). Data is mapped to dataelements in the management shell model, which is further divided into input Data, output Data and internal variables, all three Data types are mapped to submodel element collection, belonging to a collection of elements. Each data itself contains both the Name and Value attributes, with internal variables used only for temporary values in the process and cannot be output. Events can be directly mapped to Event elements in the management shell model, which can be used to represent actions or function functions that trigger execution. Unlike the events in IEC 61499, the integrated model of the invention provides an EventMessage attribute value for each event, which is used to record parameter information such as the initiator, the receiver, the type, the priority, the timestamp, etc. of the event. The internal behavior of the basic function block includes both execution algorithm (algorithm) and ecc (execution Control Chart), and when an event comes in, the function block internal algorithm is woken up to execute a set of function processing related variables and logic and possibly produce an output. Thus, algorithm is mapped to a submodel element collection, again representing a set of elements, here primarily a set of individual execution calls (operations), each of which represents a particular function of an Operation. The ECC is used to bridge the various states and transitions between states in the underlying functional block, and is also mapped to the Operation representation. In addition, it also possesses an ECCState attribute to indicate the current state and ECCActionmethodconnection to a specific execution function.
The integration rules of the service interface function blocks are shown in fig. 3, and are used to describe the function modules with universality in the Submodel, which are provided in the form of services. SIFB is part of the function block Network, and in the integration model, it is also part of the Submodel Network. The Type attribute of SIFB is mapped as Property in Submodel, belonging to an enumerated Type, containing two values: the system comprises a CoManageType and a SelfManageType, wherein the CoManageType and the SelfManageType represent that the CoManageType and the SelfManageType need to jointly complete a cooperation service together with other SIFB, and the SelfManageType represents that the SIFB is an independent service unit. The mapping relation of the SIFB data elements is basically consistent with that in the BFB, and is not described any more. In terms of internal behavior, SIFB has ServiceSequence, which is composed of a series of servicepriority, so that the former is mapped to submiodellementcollection in the integration model, and the latter is used as its element and mapped to Operation, representing a specific service Operation.
The complex function block defines a more complex function block structure, which may contain the basic function block, other smaller complex function blocks, the service interface function block, etc. so that the above element model may be used between the element entities, and only the connection relationship of each internal function block needs to be mapped. The connection relations are uniformly mapped into a Reference in an asset management shell model, and the unique IDs of the upstream and downstream connection objects can be recorded by using the Reference, so that reasonable connection can be established in data and event transmission.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concept. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (4)
1. A distributed control system management and control method based on an asset management shell is characterized by comprising the following steps:
step 1, integrating a system model, an equipment model, a resource model, an application model and a function block model of IEC 61499 into an asset management shell model to realize static mapping from top to bottom;
step 2, integrating the management model and the control model of the IEC 61499 into an asset management shell model;
wherein the system model corresponds to a management shell network of an asset management shell;
the equipment model corresponds to an asset management shell;
the resource model maps the Body part of the asset management shell;
the application model maps a submodel network in an asset management shell model.
2. The asset management shell-based distributed control system management and control method of claim 1, wherein said function block model maps a submodel or submodel element sub model element in an asset management shell.
3. The asset management shell-based distributed control system management and control method of claim 1, wherein said function block model comprises a base function block, a composite function block, and a service interface function block.
4. The asset management shell based distributed control system management and control method of claim 1, wherein said management model maps APIs defined in an asset management shell or Component Manager in an asset management shell.
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| EP3758333B1 (en) * | 2019-06-25 | 2022-09-28 | Schneider Electric Industries SAS | Method for configuring an industrial automation system |
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| CN108885560A (en) * | 2015-10-13 | 2018-11-23 | 施耐德电器工业公司 | Method for the load that shares out the work in software definition automated system |
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