Joseph Doherty
5ce62a5900
ApplyScaling (HistorianTagDefinition.ApplyScaling): The EnsT2 trailer's second byte controls server-side scaling — `FE 00` mirrors MinRaw to MinEU and sets AnalogTag.Scaling=0; `FE 01` persists distinct MinRaw/MaxRaw and sets Scaling=1. Decoded by toggling set_ApplyScaling on the native harness and capturing the wire bytes for both values with identical inputs. The earlier docs claimed EnsureTagAsync needed a follow-up "UpdateTags" call; the WCF surface has no such operation — toggling that one byte is the whole fix. StorageRate (HistorianTagDefinition.StorageRateMs): Serializer accepts a non-default rate, validated empirically against the live server which only accepts quantized values (1000/5000/10000/60000/300000 ms). EnsureTagAsync upsert semantics: Second call on the same tag name with different fields succeeds and updates Description, MinEU, MaxEU, MinRaw, MaxRaw, Scaling in place (verified by direct SQL inspection in a live test). Plan + doc closeout: write-commands-reverse-engineering.md rewritten as a current-state plan with three workstreams (A doc closeout / B idempotency / C1 StorageRate) and a parallelism table; prior phase notes preserved as appendix. handoff.md, implementation-status.md, wcf-contract-evidence.md, README.md updated to remove "writes are out of scope" / non-existent UpdateTags references and document the actual EnsT2 wire format including the `FE xx` trailer. Reverse-engineering harness gains --write-apply-scaling and a SQL post-check that prints the persisted AnalogTag bounds so future RE sessions can verify wire→DB causality without leaving the harness. 169/169 tests pass (was 165; +4 new tests covering ApplyScaling, StorageRate golden bytes, StorageRate live persistence, and EnsureTagAsync upsert semantics). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
26 lines
818 B
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26 lines
818 B
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