Sparkplug Primary Host STATE: Reject Old Offline Messages Before Broker Failover
How should a Sparkplug edge node decide whether an offline Primary Host STATE message belongs to the current host session before leaving a still-reachable MQTT broker?
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Node-RED MQTT JSON: Preserve 64-Bit Counters Before Automatic Parsing
Why can two distinct 64-bit counter values become identical after MQTT In, and where should the Node-RED flow preserve their exact representation?
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Ignition OPC UA Modbus Reads: Diagnose Requests That Cross Register Gaps
Compare the actual optimized Modbus read span with the device map before changing OPC UA subscription settings.
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TwinCAT OPC UA Symbol Exposure: Audit Filtered Import and Pragma Inheritance Together
Review PLC attribute inheritance, actual symbol artifact and filtered-import capability before accepting the exported OPC UA interface.
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OPC UA SCADA Acknowledgement: Bind the Action to the Reported Event State
Retain the selected event-state identity from an operator dialog through acknowledgement or confirmation.
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OPC UA SCADA Alarm Refresh: Remove Stale Conditions Only After Refresh Completes
Reconcile retained SCADA alarm state using refresh start/end boundaries, preserving branch identity and live updates.
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ModScan32 Polling: Count Documents, Not Windows, When Isolating Traffic
Inventory polling documents and separate views, aggregate counters and excluded custom-message paths.
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Industrial MQTT Integration: Decide Whether Sparkplug Supplies the Missing Data Contract
Assess whether Sparkplug supplies the namespace, metric and state contract required between an industrial MQTT gateway and host.
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Industrial IoT Data Collection: A Read-Only Application Is Not a Network Boundary
Review industrial gateway interfaces, management paths and enforceable boundaries instead of treating a read-only collector as network isolation.
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Industrial Historian Migration: Separate Historical Imports from Live SiteWise Telemetry
Plan SiteWise historian backfill around timestamp eligibility, bulk-import prerequisites, derived-output limits and overlapping live data.
