Blog.
Notes on P&ID instrument extraction, signal classification, line-list parsing, and the engineering workflows.
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Equipment List vs Equipment Schedule. Which Register Is WhichJuly 2026Equipment list vs equipment schedule: what each covers, the columns each carries, who owns them, and why process and HVAC projects name them differently.NAMUR NE 43 vs NE 107. Two Ways a Transmitter Says It Is SickJuly 2026NE 43 fixes fault currents on the 4-20 mA signal. NE 107 sorts device diagnostics into four status signals. What each recommendation covers and how they pair.PSD vs ESD. Two Levels of the Shutdown HierarchyJuly 2026A process shutdown trips equipment to protect the process. An emergency shutdown isolates inventory and makes the unit safe. The hierarchy, the C&E, the I/O.Tagsight Joins the Microsoft AI Cloud Partner ProgramJuly 2026Tagsight is a member of the Microsoft AI Cloud Partner Program. What that means for engineering teams and EPC firms buying through Microsoft procurement.The Instrument Index, Field by Field. Every Column and Its SourceJuly 2026Instrument index fields explained: every column, what it holds, and which document each value comes from (P&ID, datasheet, loop diagram, I/O list).Equipment Datasheet vs Instrument Datasheet. What Each One SpecifiesJuly 2026An equipment data sheet specifies a major asset. An instrument datasheet specifies a device. Where the line falls and why procurement conflates them.FAT vs SAT, and What Each One Is Checked AgainstJuly 2026FAT vs SAT compared side by side, what each test proves, what it runs against, and how an I/O list change after FAT becomes a SAT problem.ISA 84 vs IEC 61511, Are They the Same Standard?July 2026Is ISA 84 the same as IEC 61511? What the US national standard shares with the international one, and what a project spec asks of the document set.Marshalling Cabinet vs Junction Box, and the Wiring Path Between ThemJuly 2026Marshalling cabinet vs junction box, the path field wiring takes from device to I/O card, and what each document records.Mechanical Completion, the Gate Before CommissioningJuly 2026The punch list and its A/B split, what construction must prove at the mechanical completion gate, and why a stale P&ID stalls the handover to commissioning.RTU vs PLC. What Changes on the I/O List and the RegisterJuly 2026RTU vs PLC compared by application and distance rather than a spec sheet, plus what the choice changes on the I/O list and the site register.What a SIL Verification Workbook HoldsJuly 2026What a SIL verification workbook holds, and how it stays true to the SIF register, the I/O list, and the P&ID revision it was built against.
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The articles describe how Tagsight reads P&ID and produces the engineering documents.