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Field notes on P&ID extraction, ISA 5.1, and instrumentation engineering.
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How to Choose P&ID Extraction Software. A Buyer's Guide for Controls EngineersJune 2026Choosing P&ID extraction software comes down to a few criteria you can test on one drawing. This guide covers what to check and what each one protects.CFIHOS, Explained. What Instrumentation Engineers Actually Hand OverJune 2026CFIHOS, JIP36 defines the data an owner-operator receives at handover. Tag classes, ISDD properties, document links, and as-built reconciliation.Reading a Saudi Aramco P&ID. SAES Instrument Tag ConventionsJune 2026Aramco SAES instrument tags on a P&ID: why relief valves are PZV not PSV, what ZV and ZC mark, and why TIC-101 and FIC-101 can share a number.Reading Owner-Operator Instrument Tags Built on ISA 5.1June 2026Owner-operator instrument tags layer company rules on the ISA 5.1 base: how the functional identifier reads and how to confirm deviations against the legend.CFIHOS and ISO 15926. A Working Reference on Engineering Data HandoverMay 2026CFIHOS and ISO 15926 structure process-plant data handover: the lifecycle data model and why the instrument index and handover register must stay current.Brownfield I/O Reconciliation. Keep, Remove, ReplaceMay 2026On a revamp the drawings, the field, and the control system rarely agree. Reconciliation is the pass that makes the I/O list defensible.Building an I/O List From P&IDsMay 2026Building an I/O list from P&IDs: extract, classify, dedup, assign, and freeze the list, with worked examples and what stays off it.IEC 61511 for the I&C Engineer Building the SIS I/O ListMay 2026The working subset of IEC 61511 an I&C engineer needs, from reading the LOPA output through documenting proof-test intervals on the SIS I/O list.I/O List Columns Explained. What Each One Is ForMay 2026A column-by-column guide to the instrument I/O list. What each field contains, who reads it downstream, where the data comes from, and the common mistakes.I/O List to Wiring. Termination and MarshallingMay 2026The I/O list says which channel. The termination schedule says which wire. This walks the chain from field instrument to PLC card terminal.PLC Tag Naming Conventions. P&ID to DCSMay 2026The P&ID tag, the PLC variable name, and the asset-management ID are related but not the same string. The naming convention is what keeps them in sync.Redundant I/O. How 1oo2, 2oo3, and 2oo4 Voting Show Up on the I/O ListMay 2026How to represent voted sensor sets and redundant final elements on the SIS I/O list. One row per physical device, suffixed tags, shared SIF identifier.
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