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What Data Looks Like in Each Storage Type

EP.4 Series "Production Data Basics: UNS, Historian, and Lakehouse" will take you to see the appearance of data in each storage.
3 กันยายน ค.ศ. 2025 โดย
What Data Looks Like in Each Storage Type
IO Tech, sivakorn.m Meteesothon

One of the clearest ways to understand why we need three different storage systems is to look at the data itself. The same machine can produce the same signals, but the way the data is stored and represented changes depending on the system.

1. UNS – Real-Time State in Context

UNS organizes data in a folder tree based on the ISA-95 hierarchy (Enterprise → Site → Area → Line → Cell → Asset). Each node publishes a JSON payload that contains the machine’s live data points and metadata.

Example path:

HighByte/Portland/Production/Line1/Mixer/Motor001

UNS Client

JSON Payload:

{
  "AssetID": "Motor001",
  "Current": 24,
  "Speed": 1530,
  "Vibration": 70,
  "State": "Operating",
  "MaterialID": "MAT006783",
  "TankFillPct": 86.3,
  "MixTime": 1045,
  "Timestamp": "2025-08-29T10:15:23Z"
}

jSON Payload

    • It resembles a live broadcast of what’s happening now.
    • Perfect for HMIs, dashboards, MES orchestration, Andon boards
    • Not stored long-term — short-lived state + context

2. Historian – Machine Memory as Time-Series

In the Historian, the same tags (Current, Speed, Vibration) are stored as time-series values with timestamps.

Example table:

    Timestamp Tag Value Unit
    2025-08-29 10:15:23 Current 24 A
    2025-08-29 10:15:23 Speed 1530 RPM
    2025-08-29 10:15:23 Vibration 70 mm/s
    2025-08-29 10:15:24 Current 25 A
    2025-08-29 10:15:24 Speed 1532 RPM
    • Feels like a heart monitor — capturing data second by second
    • Used for trends, SPC charts, golden batch comparison, predictive maintenance
    • Stored for 3–7 years at high resolution

3. Lakehouse – Enterprise Record of Production

In the Lakehouse, the machine’s data is integrated with business context (order, material, cost center, operator). It looks like a wide relational table used for analytics.

Example production events table:

    Order ID Asset ID Material Qty Produced Scrap Start Time End Time Operator Shift CostCenter
    WO12345 Motor001 MAT-001 500 5 2025-08-29 08:00:00 2025-08-29 10:00:00 John Doe Shift A CC-1001
    • Feels like a business record of production history
    • Used for BI dashboards, forecasting, compliance reports, AI models
    • Stored for 7–10+ years with flexible schemas

Why It Matters

    • UNS shows what is happening right now (live JSON in context)
    • Historian shows how it changed over time (time-series memory)
    • Lakehouse shows what it means for the business (records + analytics)

Together, these three perspectives turn raw machine signals into insightful information for operators, engineers, and executives alike.