Engineering document // free // local browser only

PLC I/O ListTemplate & Builder

Build the signal register that connects field devices, panel wiring, PLC tags and commissioning. Check duplicates, count I/O and export a clean CSV—without creating an account or uploading project data.

TOTAL POINTS

ASSIGNED

UNASSIGNED

DISCRETE

ANALOG

VALIDATION

PASS

STATUS // Worked example loaded. Edit any cell or add a signal.

Find a signal

4 of 4 signals shown

Editable PLC input and output list
Record	Signal type	Tag *	Description / service *	PLC address	Field location	Cabinet / panel	Rack / slot / channel	Cable / core	Engineering range	Units	Normal state	Fail state	P&ID / drawing ref	Safety / SIL class	Notes
LSH-101ROW 001	Signal type for row 1	Tag for row 1	Description / service for row 1	PLC address for row 1	Field location for row 1	Cabinet / panel for row 1	Rack / slot / channel for row 1	Cable / core for row 1	Engineering range for row 1	Units for row 1	Normal state for row 1	Fail state for row 1	P&ID / drawing ref for row 1	Safety / SIL class for row 1	Notes for row 1
P-101_RUNROW 002	Signal type for row 2	Tag for row 2	Description / service for row 2	PLC address for row 2	Field location for row 2	Cabinet / panel for row 2	Rack / slot / channel for row 2	Cable / core for row 2	Engineering range for row 2	Units for row 2	Normal state for row 2	Fail state for row 2	P&ID / drawing ref for row 2	Safety / SIL class for row 2	Notes for row 2
FIT-101ROW 003	Signal type for row 3	Tag for row 3	Description / service for row 3	PLC address for row 3	Field location for row 3	Cabinet / panel for row 3	Rack / slot / channel for row 3	Cable / core for row 3	Engineering range for row 3	Units for row 3	Normal state for row 3	Fail state for row 3	P&ID / drawing ref for row 3	Safety / SIL class for row 3	Notes for row 3
XV-101ROW 004	Signal type for row 4	Tag for row 4	Description / service for row 4	PLC address for row 4	Field location for row 4	Cabinet / panel for row 4	Rack / slot / channel for row 4	Cable / core for row 4	Engineering range for row 4	Units for row 4	Normal state for row 4	Fail state for row 4	P&ID / drawing ref for row 4	Safety / SIL class for row 4	Notes for row 4

Downloadable starting points

Use the builder—or take the files.

CSV opens in Excel, LibreOffice and Google Sheets. The blank file is deliberately platform-neutral; the worked example shows how design, wiring, software and commissioning references can stay on one row.

CSV // blankPLC I/O list templateFifteen practical columns and blank rows.DOWNLOAD ↓CSV // workedPump-skid exampleDI, DO, AI and safety-output records.DOWNLOAD ↓

What belongs in a PLC I/O list?

An I/O list is a controlled interface document, not merely a list of addresses. Each signal should be traceable from the field device and drawing through the panel channel to the software tag and the commissioning record.

01 / IDENTIFY

Tag, service description, location and drawing reference establish which real device the row represents.

02 / IMPLEMENT

Signal type, range, cabinet, rack, slot, channel, cable and address define how the signal is built and mapped.

03 / PROVE

Normal state, fail state, safety classification and notes turn the row into a usable FAT, loop-check and SAT reference.

Safety boundary

A “Safety DI/DO” label does not assign a SIL, performance level or safety category. Those values must come from the approved hazard assessment, safety requirements specification and validation plan. The template gives the project a place to record that controlled reference; it does not calculate it.

Source trail and related references

ISA-5 standards overview — current identification and loop-documentation context. Column conventions still need to follow the owner's project standard.
IEC 61511-1 — process-sector safety lifecycle context for SIS records; the tool does not perform a safety assessment.
PLC I/O list definition and lifecycle — field meanings, ownership and revision-control guidance.
PLC addressing explained — how logical tags and hardware addresses differ across platforms.