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docs(twincat): native array notifications, sub-range / size-cap rules, live TC2 gate record

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Removes the 'use UseNativeNotifications=false for arrays' workaround and
documents the raw-bytes array model shared by poll and notification: element
checks, STRING arrays, multi-dim flattening, 0-based publication, leading
sub-range for a shorter arrayLength, refusals (struct/UDT arrays, too long,
scalar over array), the 128 KiB native cap (BadOutOfRange), the bit-path fix,
and the 2026-10-07 read-only live gate on Z33856 / Z33733.
This commit is contained in:
Joseph Doherty
2026-10-07 14:56:03 -04:00
parent 313946e6ea
commit 1982af8155
5 changed files with 129 additions and 26 deletions
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docs/Historian.md
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@@ -595,7 +595,7 @@ unknown keys are preserved byte-stable on round-trip by all typed editors.
| **S7** | `ReadBytesAsync` block + per-element decode loop | Unit-proven (fixture down) |
| **AB CIP** | libplctag native array read (atomic + UDT member arrays) | Unit-proven (fixture down) |
| **AB Legacy** | PCCC multi-element file read via libplctag (cap 256 elements) | Unit-proven (fixture down) |
| **TwinCAT** | ADS native array symbol read | Unit-proven (fixture down) |
| **TwinCAT** | Raw-bytes array read + per-element decode (native notifications carry the whole array) | Live-verified on TwinCAT 2.11 (2026-10-07) |
Array writes, multi-dimensional arrays (ValueRank>1), and per-element historization are out of scope — see [Uns.md §Array tags](Uns.md#array-tags-1-d).