OPC UA
Practical OPC UA guides covering data collection, subscriptions, timestamps, quality, asset mapping, and troubleshooting.
How to Collect OPC UA Data Across Segmented OT and IT Networks
An OPC UA client working beside the server proves that the endpoint and credentials can work locally. It does not prove that the same path
Juno Qiu
October 21, 2026 | OPC UA
How to Map OPC UA NodeIds to Equipment and Asset Names
An OPC UA NodeId can tell a client exactly which node to read. It does not necessarily tell an engineer which pump, line, or measurement
TDengine Team
October 21, 2026 | OPC UA
OPC UA Sampling Intervals and Deadbands: How Much Data Should You Collect?
The right OPC UA collection rate is the slowest configuration that still preserves the process behavior needed for operations and historical analysis. That rate is
TDengine Team
October 21, 2026 | OPC UA
OPC UA Data Quality Codes: Why They Matter for Historical Analysis
A historian can store a valid timestamp and a numeric value even when that value should not be used in an average, alarm review, or
TDengine Team
October 21, 2026 | OPC UA
OPC UA Alarms and Events vs. Tag History: What Should Your Historian Capture?
A pressure trend can show when a pump moved outside its normal range. It cannot, by itself, show which alarm object changed state, what severity
Juno Qiu
October 21, 2026 | OPC UA
OPC UA vs. MQTT for Industrial Data Collection: When to Use Each
Choose OPC UA when the collector needs to discover and read a structured industrial source. Choose MQTT when producers need to publish messages through a
Juno Qiu
October 21, 2026 | OPC UA
How to Prevent Data Gaps in OPC UA Collection During Network Outages
An OPC UA connection can recover after an outage while the historian still has a hole. Reconnection restores communication. It does not prove that every
TDengine Team
October 20, 2026 | OPC UA
OPC UA Timestamps: Which Time Should Your Historian Actually Store?
OPC UA can attach more than one time to the same value. Those timestamps answer different questions. Choosing one without defining its meaning can reorder
Juno Qiu
October 20, 2026 | OPC UA
OPC UA Polling vs. Subscription: Which Should You Use for Industrial Data Collection?
An OPC UA client can collect process values in two common ways. It can read each value on a schedule, usually called polling, or it
TDengine Team
October 19, 2026 | OPC UA
Why Is Your OPC UA Connection Working but No Data Reaching the Historian?
A successful OPC UA connection check proves only part of the path. It shows that the client can reach the endpoint and pass the connection
TDengine Team
October 19, 2026 | OPC UA
