SOMM: Industry Oriented Model Management ToolE. Kharlamov, B.Cuenca Grau, E. Jimenez-Ruiz, Y . Nenov, I. Horrocks - University of OxfordS. Lamparter, G. Mehdi, M. Ringsquandl, S. Brandt - Siemens AG, CT

Smart Factories

Manufacturing Model Energy Production Model

Information Models in Siemens

Semantic Models for Siemens SOMM: Siemens-Oxford Model Manager

ISA 88/95

1. General guidelines

for specifying

• functionality of

• Interface between

• manufacturing

software

2. Consists of

• UML-like diagrams

• Tables, text

• Examples

ISA 88/95 based

manufacturing model

• Design & production

• Three layers

Standards

1. EC 81346, ISO/TS 16952-10

• generic dictionary of codes

• designation & classification

of industrial equipment

2. RDS PP and KKS

• extra codes for energy equipment

• functionality, locations

• system for combining codes

Plant Model based on standards

• describes the structure of a plant

• by providing functionality & location

of each equipment component

• using RDS PP and KKS codes.

Information models

• critical in enabling smart factories

• machine-readable conceptualisations / specifications

• describe assets: equipment & production processes in a plant

• address complexity of software dev. and integration process

• raise the abstraction level

• capture: functionality of & info flow between components

Many different types of models co-exist

• independently developed

• different (often incompatible) formats

• developed using different types of proprietary software

• models may not come with a well-defined semantics

• specifications of models can be ambiguous

Challenges in practice

• model development, maintenance, and integration

• data exchange and sharing

OWL 2 for information models

• rich, unambiguous, standardised & flexible modelling language

• well-suited for describing industrial information models

• a wide range of tools for, validation, integration, and reasoning

automation of labor-intensive, error-prone tasks

RDF for data exchange

• unified data format for access and exchanged

• RDF triple stores for storing, highly scalable query answering

• can be effectively queried in conjunction with ontologies

Ontologies in Siemens

• Have been successfully used for

• Ontology Based Data Access

• MES and shop-floor level diagnostics

• Developed by R&D personnel familiar with SW technologies

Axioms & constraints (A&C)

1. Form based interface

2. A&C on the same interface

3. A&C encoded in Datalog

Auto-generated data forms

1. From properties assigned to classes

2. Both explicit and implicit

Extended hierarchies

1. Based on arbitrary properties

2. Generalisation of partonomies

Alignment

1. Allows to merge and import models

2. Based on LogMap

Reasoning

1. Schema and Instance level reasoning

2. Hermit for schema level reasoning

• Ontology classification

• Class satisfiability

3. Datalog engine with Stratified Negation

• Data validation

• Query answering

fully computerised, software-driven, automation of

(production) processes and enterprise-wide

integration of software components

Project Goals:

• to widen the scope of ontologies in Siemens

• to scale onto development

• to provide industry-oriented ontology management tool

ISA 88/95

DIN EN 62264-2:2008-07

EN 62264-2:2008

29

4.7 Process segment

4.7.1 Process segment model

A process segment is a logical grouping of personnel resources, equipment resources, and material required to carry out a production step. A process segment defines the needed classes of personnel, equipment, and material, and/or it may define specific resources, such as specific equipment needed. A process segment may define the quantity of the resource needed.

Figure 5 is a copy of Figure 17 in IEC 62264-1, with a clarification of the relationship to the personnel, equipment, and material models, and with an additional object to contain the process segment dependency.

Figure 5 – Process segment model

4.7.2 Process segment

Table 27 lists the attributes of process segment.

Corresponds to element in

Correspondsto element in

Correspondsto element in

Personnel Segment

Specification

Equipment Segment

Specification

Material Segment

Specification

Process Segment Parameter

ProcessSegment

Has propertiesof

Has propertiesof

Has properties of

Is a collection of

0..n 0..n0..n 0..n

0..n0..n0..n

May be made up of

0..n

Personnel Model

EquipmentModel

MaterialModel

0..n 0..n 0..n

1..11..11..1

Specification Property

SpecificationProperty

Material Segment

SpecificationProperty

0..n

0..n an execution dependency on

ProcessSegment

Dependency

Corresponds to element in

Correspondsto element in

Correspondsto element in

Personnel

segment

specification

Equipment

segment

specification

Material

segment

specification

Process

segment

parameter

Process

segment

Has propertiesof

Has propertiesof

Has properties of

May be made up of

Personnel Model

Personnel

model

EquipmentModel

Equipment

model

MaterialModel

Material

model

1..11..11..1

Personnel segment

specification

property

Equipment segment

specification

property

Material segment

specification

property

Process

segment

dependency

IEC 957/04

No

rmC

D -

Sta

nd

200

9-0

3

DIN EN 62264-2:2008-07

EN 62264-2:2008

15

4.5 Personnel

4.5.1 Personnel model

The personnel model contains the information about specific personnel, classes of personnel, and qualif ications of personnel. Figure 2 is a modified copy of Figure 14 in Part 1. This corresponds to a resource model for personnel, as given in ISO 15704.

Figure 2 – Personnel model

4.5.2 Personnel class

Table 3 lists the attributes of personnel class.

Table 3 – Attributes of personnel class

Attribute

name

Description Example

ID A unique identification of a specific personnel class.

These are not necessarily job titles, but identify classes that are referenced in other parts of the model.

Widget assembly operator

Description Additional information and description about the personnel class.

“General information about widget assembly operators.”

Personnel class property

Person

property

Qualification

test

specification

Personnel class

0..n

0..n

0..n

0..n

0..n

Person

Qualification test

result

0..n

0..n1..n

< Defines a procedure for how to test

Maps to

Defined by

< Records the

testing of

Is used to test >

IEC 954/04

No

rmC

D -

Sta

nd

20

09-0

3

DIN EN 62264-2:2008-07

EN 62264-2:2008

18

4.5.7 Qualification test result

Table 8 lists the attributes of qualification test result.

Table 8 – Attributes of qualification test result

Attribute

name

Description Example

ID A unique instance identification that records the results from the execution of a test identified in a qualification test specification for a specific person. (For example, this may just be a number assigned by the testing authority.)

T5568700827

Description Additional information and description about the qualification test results.

“Results from Joe’s widget assembly qualification test for October 1999.”

Date The date and time of the qualification test. 1999-10-25 13:30

Result The result of the qualification test. For example: pass, fail Pass

Result unit of measure

The unit of measure of the associated test result, if applicable.

{Pass, fail}

Expiration The date of the expiration of the qualification. 2000-10-25 13:30

4.6 Equipment

4.6.1 Equipment model

The equipment model contains the information about specific equipment, the classes of equipment, equipment capability tests, and maintenance information associated with equipment. This corresponds to a resource model for equipment, as defined in ISO 15704:2000.

Figure 3 is a modified copy of Figure 15 in Part 1.

Figure 3 – Equipment model

Maintenance request

Maintenance work order

Maintenance response

May be generated for 0..n

1..1

1..1

1..1

Equipment class property

Equipment

property

Equipment capability test specification

Equipment class

Has

values for >

0..n

0..n

0..n

0..n

0..n

Equipment

Equipment

capability test

result

0..n

0..n1..n

Has properties

of >

Maps to

Defined by <

0..n

0..n May result in >

0..1

< May be made up of? Is against

Is made

against <

0..n

0..n

< Defines a procedure for how to test

< Records the

testing of

Is used to test >

>

IEC 955/04

No

rmC

D -

Sta

nd

20

09-0

3

DIN EN 62264-2:2008-07

EN 62264-2:2008

24

Material

4.6.11 Material model

The material model defines the actual materials, material definitions, and information about classes of material definitions. Material information includes the inventory of raw, finished, and intermediate materials. The current material information is contained in the material lot and material sublot information. Material classes are defined to organize materials. This corresponds to a resource model for material, as defined in ISO 10303.

Figure 4 is a copy of Figure 16 in IEC 62264-1. An additional association is shown between a QA test specification and a material class property.

Figure 4 – Material model

4.6.12 Material class

Table 18 lists the attributes of material class.

Table 18 – Attributes of material class

Attribute

name

Description Example

ID A unique identification of a specific material class, within the scope of the information exchanged (production capability, production schedule, production performance, etc.).

The ID shall be used in other parts of the model when the material class needs to be identified, such as the production capability for this material class, or a production response identifying the material class used.

Polymer sheet stock 1001A

Description Additional information about the material class. “Solid polymer resin”

May be made up of sublots >

0..n

0..n

0..n

Hasvalues for >

0..n

0..n

0..n

0..n

0..n

1..1

0..n1..n

Has properties

of >

Maps to

< Definedby

Made up ofMaterial sublot

Material definition Property

Material lot

property

QA test

specification

Material definition Material lot

QA test result

Material class

property

Material class

0..n

Has properties

of >

0..n

Defines a grouping >

May map to

0..n

1..n

Is associated with a

< Defines a procedure for how to test

< Records the

testing of

Is used to test >

< Defines a procedure for how to test

IEC 956/04

No

rmC

D -

Sta

nd

20

09

-03

DIN EN 62264-2:2008-07

EN 62264-2:2008

19

4.6.2 Equipment class

Table 9 lists the attributes of equipment class.

Table 9 – Attributes of equipment class

Attribute

name

Description Example

ID A unique identification of a specific equipment class, within the scope of the information exchanged (production capability, production schedule, production performance, etc.).

The ID shall be used in other parts of the model when the equipment class needs to be identified, such as the production capability for this equipment class, or a production response identifying the equipment class used.

WJ6672892

Description Additional information about the equipment class. “Jigs used to assemble widgets.”

4.6.3 Equipment class property

Table 10 lists the attributes of equipment class property.

Table 10 – Attributes of equipment class property

Attribute

name

Description Examples

Run rate ID An identification of the specific property.

Template size

“Range of run rate for the widget machines.”

Description Additional information about the equipment class property.

“Range of template sizes for widget machines.”

{1..100} Value The value, set of values, or range of the property.

{10,20,30,40,100,200,300}

Widgets/h Value unit of measure

The unit of measure of the associated property value, if applicable.

cm

No

rmC

D -

Sta

nd

200

9-0

3

DIN EN 62264-2:2008-07

EN 62264-2:2008

19

4.6.2 Equipment class

Table 9 lists the attributes of equipment class.

Table 9 – Attributes of equipment class

Attribute

name

Description Example

ID A unique identification of a specific equipment class, within

the scope of the information exchanged (production capability, production schedule, production performance, etc.).

The ID shall be used in other parts of the model when the equipment class needs to be identified, such as the

production capability for this equipment class, or a

production response identifying the equipment class used.

WJ6672892

Description Additional information about the equipment class. “Jigs used to assemble widgets.”

4.6.3 Equipment class property

Table 10 lists the attributes of equipment class property.

Table 10 – Attributes of equipment class property

Attribute

name

Description Examples

Run rate ID An identification of the specific property.

Template size

“Range of run rate for the widget machines.”

Description Additional information about the equipment class property.

“Range of template sizes for widget machines.”

{1..100} Value The value, set of values, or range of the property.

{10,20,30,40,100,200,300}

Widgets/h Value unit of measure

The unit of measure of the associated property value, if applicable.

cm

No

rmC

D -

Sta

nd

20

09

-03