{
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  "generated_at_utc": "2026-10-25T20:55:19.974986+00:00",
  "record_id": "VXI-EXT-PROCUREMENT-MODBUS-ACK-PROCESSING-01-v1",
  "record_kind": "external_reference",
  "title": "MODBUS long-running programming response status",
  "system": "MODBUS Application Protocol V1.1b3",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Does MODBUS exception 05 ACKNOWLEDGE establish that the requested programming command is complete?",
  "near_questions": [
    "Does MODBUS exception 05 mean programming has finished?",
    "How does a busy MODBUS response differ from an acknowledgement?",
    "Which evidence follows acceptance of long-running MODBUS programming?",
    "Does exception 06 identify the command already running?"
  ],
  "supported_claims": [
    {
      "claim": "MODBUS Application Protocol 1.1b3 defines exception 05 as acceptance of a specialized long-duration programming request, with a completion poll available. Exception 06 reports that the server is busy processing a long-duration program. Neither response proves completed physical work, and a busy response does not identify the current program or authorize a generic retry.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "The source marks both codes as specialized for programming commands. This does not prove physical equipment completion or make arbitrary retries safe; prior timeout/idempotency and broadcast candidate gaps remain open.",
    "Buyer implementation, live runtime enforcement, settled payment, physical outcome, certification or permission to act are not established.",
    "No expanded capabilities or licences for existing INDEX executables."
  ],
  "public_summary": "MODBUS Application Protocol 1.1b3 defines exception 05 as acceptance of a specialized long-duration programming request, with a completion poll available. Exception 06 reports that the server is busy processing a long-duration program. Neither response proves completed physical work, and a busy response does not identify the current program or authorize a generic retry.",
  "related_record_ids": [],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "MODBUS Application Protocol V1.1b3",
    "source_url": "https://www.modbus.org/file/secure/modbusprotocolspecification.pdf",
    "checked_on": "2026-10-25",
    "candidate_record_id": "VXI-EXT-PROCUREMENT-MODBUS-ACK-PROCESSING-01-v1",
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    "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research."
  },
  "answer_policy": {
    "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY",
    "bounded_answer": "MODBUS Application Protocol 1.1b3 defines exception 05 as acceptance of a specialized long-duration programming request, with a completion poll available. Exception 06 reports that the server is busy processing a long-duration program. Neither response proves completed physical work, and a busy response does not identify the current program or authorize a generic retry.",
    "required_buyer_context": "Programming function and request identity; Exception response; Completion poll and independent outcome evidence. Buyer deployment not inspected.",
    "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state."
  },
  "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.",
  "decision_profile": {
    "schema": "varexis-vendor-evidence-review/1",
    "review_status": "documentation_review_only",
    "checked_on": "2026-10-25",
    "claim_to_check": "Does MODBUS exception 05 ACKNOWLEDGE establish that the requested programming command is complete?",
    "documented_statement": {
      "status": "documented",
      "statement": "MODBUS Application Protocol 1.1b3 defines exception 05 as acceptance of a specialized long-duration programming request, with a completion poll available. Exception 06 reports that the server is busy processing a long-duration program. Neither response proves completed physical work, and a busy response does not identify the current program or authorize a generic retry.",
      "source_ids": [
        "modbus-1-1b3"
      ]
    },
    "review_inference": {
      "status": "review_inference",
      "statement": "Separate accepted long-running work from completed equipment programming. This is a documentation-review judgment, not an observed deployment outcome.",
      "source_ids": [
        "modbus-1-1b3"
      ]
    },
    "buyer_evidence_required": [
      "Programming function and request identity",
      "Exception response",
      "Completion poll and independent outcome evidence"
    ],
    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Refuse buyer-specific assurance from documentation alone. The source marks both codes as specialized for programming commands. This does not prove physical equipment completion or make arbitrary retries safe; prior timeout/idempotency and broadcast candidate gaps remain open."
    },
    "unknowns": "The buyer implementation, effective configuration, complete evidence inventory and actual business outcome were not inspected.",
    "unknown_finding": {
      "status": "unknown",
      "statement": "The buyer implementation, effective configuration, complete evidence inventory and actual business outcome were not inspected."
    },
    "evidence_sources": [
      {
        "source_id": "modbus-1-1b3",
        "url": "https://www.modbus.org/file/secure/modbusprotocolspecification.pdf",
        "final_url": "https://www.modbus.org/file/secure/modbusprotocolspecification.pdf",
        "status": 200,
        "captured_at_utc": "2026-10-25T20:04:29.497Z",
        "sha256": "f80d0d7132fd035104c3f21b01026470e3310ca3d8d493d9a9737d0d32ad2eb1",
        "bytes": 932519,
        "title": "MODBUS Application Protocol V1.1b3",
        "hash_basis": "SHA-256 of unmodified HTTP response body bytes",
        "rights_review": "Original factual paraphrase and citation only. Modbus Organization retains rights in its specification. The captured PDF, figures and tables remain private; no standard or implementation code is redistributed.",
        "checked_on": "2026-10-25",
        "capture_status": 200,
        "claim_review_completed": true,
        "reviewed_sections": [
          "Section 7, exception code 05",
          "Section 7, exception code 06",
          "Section 7, exception code 03",
          "Section 6.21",
          "Section 6.17"
        ],
        "version_context": "MODBUS Application Protocol V1.1b3, dated April 26 2012; device function support and physical behavior unverified."
      }
    ],
    "observed_deployment": false,
    "commercial_reliance_boundary": "Documentation review only; the buyer must establish applicability and actual outcomes. INDEX does not inspect or control the deployment.",
    "paid_value": {
      "decision_context": "Separate accepted long-running work from completed equipment programming.",
      "free": "Complete review, practical questions, sources and limitations; may be saved locally.",
      "single_request": "Existing server-saved version-bound route snapshot for later authenticated retrieval.",
      "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.",
      "excluded": [
        "Fresh vendor research",
        "Continuous monitoring or change alerts",
        "Testing the buyer configuration",
        "Private evidence or vendor certification"
      ],
      "integrity": "Hashes identify content versions; they do not prove truth or provide a signature."
    },
    "revalidation": {
      "trigger": "A saved purchase does not recheck the source or buyer configuration.",
      "specific_watch": "Recheck Section 7, exception code 05; Section 7, exception code 06 in MODBUS Application Protocol V1.1b3 when the source, applicable version, configuration or intended reliance changes. A detected change creates a review candidate, not automatic approval."
    },
    "buyer_relevance": "Separate accepted long-running work from completed equipment programming.",
    "refusal_conditions": [
      "Refuse buyer-specific assurance from documentation alone. The source marks both codes as specialized for programming commands. This does not prove physical equipment completion or make arbitrary retries safe; prior timeout/idempotency and broadcast candidate gaps remain open."
    ]
  },
  "niche": {
    "niche_id": "agent-authority-action-evidence",
    "label": "Agent Authority & Action Evidence",
    "classification_id": "governance",
    "classification_label": "Agent Governance & Policy Boundaries",
    "topic_id": "governance",
    "buyer_intent": "Separate accepted long-running work from completed equipment programming.",
    "comparison_role": "supplementary_discovery"
  },
  "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.",
  "service_route": {
    "request_guide": "/varexis-index/request.html",
    "request_workflow": "/varexis-index/request-workflow.json",
    "service_id": "single_request",
    "service_routes_url": "/varexis-index/service-routes.json",
    "payment_required": true,
    "availability_endpoint": "/api/index/capabilities",
    "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED",
    "checkout_url": "/index-access"
  },
  "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.",
  "human_page": "/varexis-index/catalog.html#modbus-ack-processing",
  "machine_readable_record": "/varexis-index/records/modbus-ack-processing.json"
}