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Introduction
Asset Administration Shells (AAS) are revolutionizing industrial automation by enabling semantic interoperability and standardized digital representations of assets. At the VDI-Kongress Automation, experts highlighted key advancements in AAS submodels, including sensor measurement integration, plant-wide taxonomy, and production scheduling.
Learning Objectives
- Understand the significance of semantic interoperability in AAS submodels.
- Learn how AAS can describe entire plants, not just individual components.
- Explore the Production Calendar Submodel and its integration with iCalendar (RFC 5545).
You Should Know
1. Semantic Interoperability in AAS Submodels
Relevant Standard: IDTA 0229-1 (Sensor Measurement Value Submodel)
Key Command (OPC UA Integration):
opcua-client --endpoint="opc.tcp://your-server:4840" --node="ns=2;s=Device1/Temperature"
Step-by-Step Guide:
1. Install an OPC UA client (e.g., `opcua-commander`).
- Query sensor data using the node ID format
ns=2;s=Device1/{Parameter}. - Map results to the AAS submodel via IDTA 0229-1 for standardized reporting.
2. Plant-Wide AAS Taxonomy
Tool: Eclipse BaSyx AAS Framework
Code Snippet (XML AAS Descriptor):
<aas:assetAdministrationShell xmlns:aas="https://admin-shell.io/aas/3/0"> <aas:submodels> <aas:submodelRef href="urn:miriam:plant-layout001"/> </aas:submodels> </aas:assetAdministrationShell>
Steps:
- Define submodels for each plant component (e.g.,
plant-layout001). - Aggregate submodels under a root AAS using Eclipse BaSyx.
- Validate interoperability using the AASX Package Explorer.
3. Production Calendar Submodel (IDTA 02067)
Standard: RFC 5545 (iCalendar)
Example Command (Python iCal Parsing):
from icalendar import Calendar
cal = Calendar.from_ical(open("production_schedule.ics").read())
for event in cal.walk("VEVENT"):
print(event.get("dtstart").dt)
Implementation:
1. Export production schedules as `.ics` files.
2. Parse events using Pythonβs `icalendar` library.
- Map to AAS submodel `IDTA 02067` for unified scheduling.
4. OPC UA PA-DIM Integration
Companion Spec: OPC UA PA-DIM
OPC UA Query:
ua-read -n "ns=4;s=PA_DIM/FlowRate"
Steps:
1. Deploy PA-DIM-compliant OPC UA servers.
2. Use `ua-read` to extract process data.
3. Align with AAS submodels for asset management.
5. AAS Security Hardening
Tool: AASX Server Hardening
Command (TLS Configuration):
server {
listen 443 ssl;
ssl_certificate /etc/ssl/aasx.crt;
ssl_certificate_key /etc/ssl/aasx.key;
}
Steps:
1. Generate TLS certificates via OpenSSL.
2. Configure NGINX to serve AASX packages securely.
- Enforce role-based access control (RBAC) in AASX Server.
What Undercode Say
- Key Takeaway 1: AAS transforms industrial automation by bridging proprietary systems via semantic standards.
- Key Takeaway 2: Submodel reuse (e.g., iCalendar) accelerates implementation and reduces vendor lock-in.
Analysis:
The push for plant-wide AAS adoption signals a shift from siloed automation to integrated Industry 4.0 ecosystems. However, challenges remain in scaling security and cross-vendor compatibility. Future developments may leverage AI for dynamic submodel optimization, further reducing manual configuration.
Prediction
By 2030, AAS will underpin 60% of smart factories, with AI-driven submodels autonomously adapting to production changes. Standardization bodies like IDTA and OPC Foundation will play pivotal roles in this transition.
References:
IT/Security Reporter URL:
Reported By: Leon Urbas – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass β
