📦 Resource pdf

AEF VT Certification Roadmap & Documentation Kit

The AEF VT Certification Roadmap & Documentation Kit is an official resource published by the Agricultural Industry Electronics Foundation (AEF) to guide manufacturers through the standardized certification process for ISOBUS Virtual Terminal (VT) devices. It defines mandatory and optional conformance requirements, test procedures, versioning rules, and documentation templates required to achieve AEF-compliant VT interoperability. The kit ensures that VT implementations across different manufacturers correctly interpret and execute ISOBUS messages, enabling plug-and-play functionality with compatible ECUs and task controllers.

📖 Overview

The AEF VT Certification Roadmap & Documentation Kit serves as the authoritative procedural and technical framework for validating compliance with ISO 11783-6 (Virtual Terminal) and AEF-specific extensions. It outlines a staged certification pathway—including pre-certification validation, formal conformance testing via AEF-accredited labs, and post-certification maintenance—aligned with AEF’s versioned certification levels (e.g., VT 3.0, VT 4.0, VT 5.0). Central to the kit are the AEF Conformance Test Specifications (CTS), which define pass/fail criteria for over 200+ test cases covering UI behavior, object pool management, dynamic object handling, ECU interaction protocols, and error recovery mechanisms. The documentation component includes mandatory artifacts such as the VT Declaration of Conformance (DoC), VT Configuration File (VTF) schema templates, version-controlled VT Object Pool definitions, and traceable test reports. Crucially, the roadmap integrates version synchronization rules between VT software, AEF CTS versions, and underlying ISOBUS stack releases—ensuring backward compatibility while enabling feature evolution like multi-language support, touch gesture handling, and secure firmware updates.

📑 Key Components

1 AEF Conformance Test Specification (CTS)
2 VT Declaration of Conformance (DoC) Template
3 VT Configuration File (VTF) Schema & Validation Tools

🎯 Applications

  • Certifying VT software/firmware for OEM agricultural machinery
  • Validating interoperability between VTs and ISOBUS-compatible ECUs (e.g., section controllers, implement controllers)
  • Supporting AEF Plug-and-Play (PnP) compliance audits and type approval for CE/UL certification

📐 Key Formulas

VT Version Compatibility Index

CI = Σ(w_i × δ_i) / Σw_i, where δ_i = 1 if feature i is supported and compliant, else 0; w_i = AEF-assigned weight for feature i

Quantifies overall conformance score across weighted functional categories (e.g., object pool, messaging, diagnostics) for certification tier assessment.

Object Pool Memory Overhead Ratio

R = (Used_Object_Pool_Memory / Allocated_Object_Pool_Memory) × 100%

Measures memory utilization efficiency during VT runtime; must remain ≤95% under worst-case load per AEF CTS §7.3.2.

🔗 Related Concepts

ISOBUS (ISO 11783) AEF Plug-and-Play (PnP) Initiative Virtual Terminal Object Pool

📚 References

#ISOBUS #AEF #Virtual Terminal #Certification #Agricultural Electronics