Loopdraft · control-loop documentation studio

Describe the control loop. Get the doc and the diagram.

Vertical tooling for control and automation engineers: turn a plain-language loop description into a Sequence of Operations, I/O list and an illustrative reference diagram — reviewed by you, the competent engineer.

Reference-only · engineer-reviewed

01 · Loop description

Input

Describe the control loop or process you need documented.

Optional — known process types are pre-seeded with a starter I/O list.

AI disclaimer: outputs are illustrative, reference-only drafts — not certified engineering drawings, professional engineering opinions or functional-safety assessments. A competent engineer must review every output before use.

02 · Generated document

Your structured document appears here

Loopdraft workspace: a described control loop rendered as a structured document and an ISA-style control-loop diagram

Pick an example or describe your loop, then Generate. The document and a matched illustrative diagram render here.

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Documents drafted
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Diagrams drafted
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Diagram types
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Export formats

How the studio works

One progressive link: describe → document → diagram → adjust → video

Five-step Loopdraft workflow: describe, document, diagram, adjust, video
Read the full workflow

Illustrative diagram library

Six matched reference diagram types

Open the library
Illustrative control loop diagram with sensor, controller, setpoint and actuator with feedback
01

Control loop diagram

Sensor → controller → actuator with setpoint, PID block and feedback path, plus a symbol legend.

SP / PV / COPID blockillustrative
Illustrative P&ID snippet with a level tank, transmitter and control valve
02

P&ID snippet

ISA-style process and instrumentation fragment: vessel, transmitter, indicating controller and control valve.

ISA symbolstag tablenot certified
Illustrative terminal block wiring sketch with DI, DO, AI and AO points
03

I/O terminal wiring sketch

Terminal block layout grouping DI/DO/AI/AO points with tags, signal types and 4–20 mA notes.

DI · DO · AI · AO24 VDCillustrative
Illustrative control panel general arrangement concept with PLC, PSU, breakers and relays
04

Control panel general arrangement

Concept enclosure layout placing PLC, 24 VDC PSU, breakers, control relays and interface I/O relays.

PLC · PSUconcept layoutnot fabrication
Illustrative duty-standby pump schematic with hand-off-auto selector and low-level cutout
05

Duty / standby pump schematic

Two-pump set with hand-off-auto selector, low-level cutout and run-hours changeover, with legend and title block.

HOA selectorLSL cutoutrun-hours
Illustrative three-segment conveyor start-sequence diagram with motors and interlocks
06

Conveyor start sequence

Three conveyor segments with motors, run-signal interlocks and a step table for cascade start.

3 segmentsrun interlocksstep table

Subscription plans · USD

Plans for individual engineers and small teams

Full pricing & FAQ

Draft

Try the describe-to-document workflow.

$0free
  • ·2 document drafts per month
  • ·1 illustrative diagram per month (watermarked)
  • ·Sequence of Operations + I/O list preview
  • ·Reference-only stamp on every output
Most popular

Engineer

For individual control and commissioning engineers.

$23/ month
  • ·40 documents per month
  • ·60 illustrative diagrams per month
  • ·Export to PDF, SVG and PNG
  • ·Tag Register and Cause & Effect draft
  • ·No watermark on exports

Studio

For small teams delivering docs, diagrams and training clips.

$129/ month
  • ·Unlimited documents and diagrams
  • ·Sequence-of-Operations video explainers
  • ·Bulk I/O import
  • ·Priority generation
  • ·Shared team folders

Team & project enquiry

Talk to us about a documentation set for your team

Tell us about the loops, panels and sequences you need documented. A control-engineering specialist replies by email — support@faskinconvtrol.shop.

A commissioning note shown on a tablet at an industrial control cabinet