The historian's Int1 analog-tag creation path is server-degenerate:
EnsureTags(Int1) stores an unusable stub (live-probed on the deployed
2023 R2 historian; root-caused + documented gateway-side in
HistorianGateway #11 / PR #16). HistorianTypeMapper mapped
DriverDataType.Boolean -> HistorianDataType.Int1, so Boolean historized
tags failed auto-provisioning.
Map Boolean -> Int2 instead (store 0/1). Int2 is a proven-creatable
analog type, and the value-write path already sends every value as a
double on WriteLiveValues regardless of tag type, so Boolean 0.0/1.0
round-trips cleanly. Both Float and Int2 are supported, so a
pre-existing Float Boolean tag retypes cleanly on its next deploy.
- HistorianTypeMapper: Boolean => Int2 (+ remarks)
- Unit pins: HistorianTypeMapperTests, GatewayTagProvisionerTests
(Boolean_definition_carries_explicit_Int2_presence)
- Live gate: EnsureTags_boolean_sandbox_provisions_as_Int2 (was _Int1);
retype probe reframed Float->Int2 (drops the dead Int1 leg)
- Docs: docs/Historian.md 'Boolean historization maps to Int2', CLAUDE.md,
archreview STATUS.md (R2-06 live gate -> 6/6)
Resolves#441.
Live validation against wonder-sql-vd03 caught that the gateway's SendEvent handler
throws when the wire event carries a client-supplied Id — so every alarm send from
OtOpcUa failed (PermanentFail). AlarmEventMapper now leaves HistorianEvent.Id unset
(the historian assigns event identity) and preserves the alarm's id as an 'AlarmId'
property. With this, the live alarm send acks.
Also harden the env-gated live tests against two gateway/historian-side limitations
surfaced during validation (neither an OtOpcUa defect): the write readback uses a
timezone-tolerant window (an explicit-timestamp WriteLiveValues lands offset by the
deployment's local-vs-UTC delta — reproducible via raw grpcurl; OtOpcUa sends correct
UTC), and the alarm ReadEvents readback skips with a clear reason when the historian's
server-gated event reads (C2, won't-fix) return nothing. Read + write-persist +
alarm-send are all live-validated green; the alarm send-ack is split into its own test.
Claude-Session: https://claude.ai/code/session_012SDSQ3AcaXqPcBtDESBRii
Joseph Doherty