Articles
Practical writing on site data for commissioning and O&M engineers: what to log, how to size it, and what to check before trusting a trend.
What is an industrial data historian?
What a historian does, how it differs from SCADA trends and a general database, and the questions worth asking before you choose one.
Why your trend draws a line across the outage
Many trends join the line across a lost connection, and the chart looks fine. Why it happens, why it matters, and a ten-minute test for your own system.
How much disk does a historian need on a battery site?
A worked method for sizing storage, with measured figures from a week of logging 2,500 signals from a simulated 20 MW battery site.
OPC UA or Modbus TCP for logging site data?
How the two protocols compare for logging: data model, timestamps, quality, security and efficiency, and which to use where on a battery or generation site.
Logging an S7‑1500 over OPC UA
Switching on the CPU's OPC UA server, getting certificates and users right, the limits by CPU and firmware, and what the common error codes mean.
See Vault on your own plant
Early access sites get the full product, direct help from engineering, and their first site licence for £1,995 instead of £2,495.