FeatureBuilt · in the lab
Plant historian link
Live tags on the P&ID and the 3D model.
Use this add-on:
Screenshots and a short video come with the listing (AL.3).
Overview
Plant historian link is a planned add-on for CadCraft and BimCraft (roadmap row CH.27). It is meant to show live tag values from a plant on the P&ID and on the 3D model, with trends, and to compare the model with the plant. It is not built as an add-on: no connection, overlay or panel works today.
Who it’s for
- Plant operators and process engineers who want live values on the drawing (intended).
- Engineers who want to check a model against what the plant does (intended).
What you can do
- Nothing works today: the add-on is planned. What is intended for row CH.27: an OPC UA and a REST or CSV connector through Studio, live tags on the P&ID and the 3D model, and trends. It is meant to be read only.
Methods and standards
The planned add-on sits on the live-data engine (engine.live). The engine has lib/process/env/historian.js: a tag map, units to SI, OPC UA quality codes, REST and CSV adapters, an overlay for P&ID and 3D markers, a model comparison that reports deviations, and trend thinning. It has no write method. Its OPC UA adapter works only through a Studio bridge and reports itself unavailable without one; that bridge is not built.
Data and sources
Planned: no data ships. Values would come from the person's own historian, with credentials kept by the host.
Verification
Not yet checked as an add-on: planned, no add-on test exists. The engine side is covered by tools/process-test/test-env.mjs (206 passed, 0 failed on 2026-10-28, per docs/0.8-sessions/chem-env_PART_3.md); tools/live-test/test.mjs is recorded in docs/0.8-sessions/xe-trace-live_PART_3.md as 124 passed, 0 failed for the live-data readers. No test has run against a real historian.
Limits
Planned and not built. Not built: Studio's OPC UA bridge, subscriptions, alarms from the source, the drawing overlay commands and a trend panel. Needs host access in Studio that the person must allow. A connection to a plant network is the user's decision and risk.
Files and formats
Would read tag values over OPC UA or REST and CSV. Nothing is written to the plant.
Get started
- This add-on is planned (roadmap row CH.27). Nothing is installed or switched on today.
- Follow row CH.27 in /roadmap-issues for its status.
- Until then the historian module is a library only, and nothing connects to a plant.
Languages
No languages are listed for this add-on yet. Its maker may add some.
Works in
| Edition | Works | Note |
|---|---|---|
| Browser (/use) (yours) | Added on demand | Fetched the first time you use it, then kept for offline use. |
| Studio from getcadcraft.com | Added on demand | Fetched the first time you use it, then kept for offline use. |
| Microsoft Store | Added on demand | Fetched the first time you use it, then kept for offline use. |
| Google Play | Added on demand | Fetched the first time you use it, then kept for offline use. |
| iPad and iPhone (App Store) | Included; switch it on | Part of the reviewed app; your list switches it on. |
| Custom build | Added on demand | Fetched the first time you use it, then kept for offline use. |
Comes with
- Live data 500 KB
Adding it brings these too. Engines are shared: each downloads once for every add-on that uses it.
Needed by: Instrumentation and control engineering.
Versions
| Version | Channel | Date | What changed |
|---|---|---|---|
| 1.0.0 | lab | October 31, 2026 | First version in the Library. |
Licence and maker
CadCraft (CadCraft, first-party). Licence: Apache-2.0. Dependencies carry their own licences, listed on their pages.