S95.02,Model Object Attributes

S95.02

Part 2: ANSI/ISA-95.00.02-2001

Enterprise – Control System Integration Part 2: Object Model Attributes

First you use part 1, then part 2

With part 1 you can determine which information must be exchanged between the enterprise and the control system. After this information analysis, you can start to build the interface between both systems. The standard does not tell which technical solution you should choose (an example of a technical solution could be xml/B2MMl). But part 2 does offer a basis for this technical solution, because it determines the attributes of all the objects defined in part one. You can use these objects and attributes for the exchange of information, but they are also an excellent basis for developing relationel databases.

Figure 1: part of the S95 Material model

Objects and attributes

Part 2 has determined the attributes for the following object models:

· Production capability model

· Process segment capability model

· Personnel model

· Equipment model

· Material model

· Process segment model

· Product definition information model

· Production schedule model

· Production performance model

With these objects and attributes you can build all the information flows defined by the functional model of part 1.

Attribute name	Description	Examples
ID	A unique identification of a specific material sublot, within the scope of the information exchanges (production capability, production schedule, production performance…). The ID shall be used in other parts of the model when the material sublot needs to be identified, such as the production capability for this material sublot, or a production response identifying the material sublot used.	1999-10-27-a67-B6653
Description	Additional information about the material sublot.	Pallet 2 of 6
Status	Status of the current material sublot. For example, released, approved, blocked, in process, in quality check.	Released
Storage Location	An identification of the storage location of the material sublot.	“Warehouse 1 Rack 12 Slot 4”
Quantity	The quantity of the material sublot.	40
Quantity Unit of Measure	The unit of measure of the associated quantity, if applicable.	sheets

Figure 2: tabel 37 from S95.02: the attributes of a material sublot

Abstract, so it can be used for all kinds of interfaces

The attributes are abstract, they do not define any specific data types. That’s why the standard can be used in all kinds of manufacturing facilities. For every different project, you will have to determine how the information is going to be depicted. For example: an attribute could be shown as a string in one implementation, and it could have a numerical value in another implementation. A date or time value could be shown in the sequence Day-Month-Year, or Year-Month-Day. S95.02 gives examples for every attribute. It will not always be necessary to use every attribute in every implementation. This depends on how many models you are using. It is allowed to leave out models that you don’t need. You can also add attributes by using properties. S95.02 offers tables for properties. These can be used for information that is very specific for the company. This way the standard can be used in all kinds of industries.

Do you want to know more about S95?

Visit the ISA S95 Seminar or the ISA S95 Training Course.