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docs(abcip): #592 native array-element write on Z35162 (_SEQ_EP[31], user-approved, restored)

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Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe
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Joseph Doherty
2026-10-09 06:41:14 -04:00
parent c36224d956
commit a7c27e978f
3 changed files with 19 additions and 5 deletions
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docs/plans/2026-10-07-native-ab-transport-gate-results.md
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@@ -784,3 +784,16 @@ whole-array write at the driver layer (array tags are read-only, `DriverArrayWri
128-byte array (or this 88-byte STRING) is a single Write Tag: `LogixTagClient.WriteAsync` fragments only when the request
exceeds `MaxRequestBytes` (4000 B on the Large Forward Open this controller grants). A fragmented write needs a value of
roughly 4 KB.
### Native array-element write — 2026-10-09 (user-approved, Z-35162)
`Program:EM01_PowerUnit._SEQ_EP` (DINT[32]). L5X check: its only alias is `_SEQ_EP01_AutoCycle -> _SEQ_EP[1]`; no routine references `_SEQ_EP` directly (no index, COP or FLL); no cross-program reference. AbCip CLI (native) from master `98c00904`, one element per read, two snapshots 30 s apart before writing. `[1]` = -1 is the idle auto-cycle step.
```
SNAP1: 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
SNAP2: 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
WRITE [31]=4242: Write Program:EM01_PowerUnit._SEQ_EP[31]: 0x00000000 (Good)
AFTER: 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4242
RESTORE [31]=0: Write Program:EM01_PowerUnit._SEQ_EP[31]: 0x00000000 (Good)
FINAL: 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
```