SCADA history ready to go to work
Straightforward principles for optimizing SCADA data relevance, safety and shareability with Trihedral Engineering's Chris Little.
Image for illustration purposes.
Ensuring your SCADA system’s data history is clean, reliable and accessible is vital for getting real value from your control systems. The data logged by a SCADA historian isn’t just for record‑keeping; it’s essential for cost control, maximising asset uptime and extending the lifespan of your infrastructure. To make sure the data works for you, focus on three pillars: relevance, completeness and resilience.
1. Relevance: Avoid Data Overload
Only record what truly matters. Tiny fluctuations—like wind rippling a lake—don’t need logging. Use configurable deadbands to ignore insignificant changes, and adjust polling rates to suit actual needs. Logging every I/O point every second is rarely necessary. Fine‑tuning these settings cuts database size and network load.
2. Completeness: Never Miss a Moment
Data gaps can cripple diagnostics and performance optimisation. To prevent this, deploy redundant historian servers that synchronise in real time. Even smaller installations can benefit—losing historical data during a failure can cost more than a second server. If migrating systems, export existing logs (for example, via CSV) and import them so your history stays intact.
3. Resilience: Secure and Share Your Data
Back up historian data across multiple locations—same‑office backups won’t protect you from floods, fires or power cuts. Geography matters. With proper real‑time synchronisation and off‑site backups, data survives disasters. And if the goal is to share logs—whether with internal analytics tools or AI platforms—ensure your historian supports export formats and works with your broader IT ecosystem.
Adhering to these principles—logging only relevant data, guaranteeing continuous history and safeguarding against loss—lets a SCADA historian do more than simply record trends. It becomes a powerful tool for smarter operations, predictive maintenance and more efficient, reliable systems.
Source: Interview of Chris Little by CONTROL Global
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