Purpose
The OPC
Foundation’s ISA-95 OPC UA Working Group will develop an OPC UA
Information Model for ISA-95. ISA-95 is already used in many
industries and can be exchanged using B2MML, OPC UA
implementation will complement B2MML by providing a secure and
reliable environment that is widely accepted in the
manufacturing industries
Scope
The latest released versions of Parts 1 and 2
of the ISA-95 standard will be used to define a UA companion
specification using OPC UA constructs for the purpose of
exposing the ISA-95 objects and attributes. The extent of the
ISA-95 standard that will be covered by the companion
specification will be finalized by the working group, but it is
envisioned that the first release of the UA companion
specification will include a subset of the entire ISA-95
standard, likely covering the role based equipment, physical
asset, material and personnel object models in ISA-95 (see REF
_Ref308444609 \h
Figure 1).
Later revisions of the companion specification may include
support for the other ISA-95 object models such as process
segment, operations definition, operations schedule, operations
performance and operations capability object models.
Interactions with existing B2MML systems will be considered to
allow easier adoption.
Working Group
Membership
Working group membership (participation) is
open to any employee or representative of a member company, in
good standing, of OPC Foundation and members of the ISA95
committee. The number of participants is not limited and the
working group encourages all interested parties to volunteer
their time. Each participant represents his or her Company in
the working group. A Company can have as many members as they
wish.
Membership Terms
Working group members have no set term
however it is strongly suggested that a member commits to remain
a member during the development and release of the defined
deliverables.
Working Group Chairman
The working group Chairman will be chosen
after the working group is formed.
Working Group Start-up
The working group will be formed with a call
for members.
Working Group Operation
The operating format of the working group
will be modelled after that of the current working group for OPC
UA. This format includes advance meeting communication, periodic
schedule for meetings, meeting minutes, etc. The OPC Technical
Advisory Council (TAC) will coordinate the work of this working
group and the ongoing work of the UA working group.
Working Group Meetings
The working group meets as needed. Meetings
may be electronic or in person. The frequency and form of the
meetings will be established as the working group forms.
Proposed Project Schedule
An initial OPC
UA ISA-95 information model has been created by an interested
group of ISA95 committee and OPC Foundation members to help
define the scope of work and to illustrate the required
modelling concepts. This initial model can be used to help
educate group members that are familiar with either ISA-95 or
OPC UA but not both. It may also be used as a template for the
required translation of the ISA-95 standard into OPC UA terms.
The following
schedule is an initial proposal that is based on utilization of
the initial information model and can be revised as needed
depending on the desires of the working group.
January
2012 Kickoff and initial meeting corresponding to
OPC UA working group meeting.
April 2012
Initial Common Object Model Mapping to OPC UA
June,
2012 Initial Vendor prototype implementations.
Fall,
2012 Presentation of results and demo at a
trade show.
December, 2012 First
specification version completed.
It is envisioned that initial prototypes may
result in UA information model updates.
Deliverables
The working group will deliver the following:
OPC UA Information Model for ISA-95 standard Parts 1 & 2, in
particular the Common Object Model (role based equipment,
physical assets, personnel and material)
Evaluation with vendor applications.
Trade show demonstration and information material
Best practice guidelines for extended use of OPC UA with the
ISA-95 information model
This list may be expanded to cover additional
object models or parts of the ISA-95 standard as the working
group makes progress.
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