From 826b65c6a1a7929ec7b95be528a2e7490bfb5e8e Mon Sep 17 00:00:00 2001 From: Joseph Doherty Date: Wed, 3 Jun 2026 16:52:12 -0400 Subject: [PATCH] =?UTF-8?q?docs(audit):=20drivers/README.md=20=E2=80=94=20?= =?UTF-8?q?add=20IRediscoverable=20to=20TwinCAT=20matrix=20(cross-doc=20fi?= =?UTF-8?q?x)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- docs/drivers/README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/drivers/README.md b/docs/drivers/README.md index 373820f5..2268a4a7 100644 --- a/docs/drivers/README.md +++ b/docs/drivers/README.md @@ -26,7 +26,7 @@ Driver type metadata is registered at startup in `DriverTypeRegistry` (`src/Core | [Siemens S7](S7.md) | `Driver.S7` | A | [S7netplus](https://github.com/S7NetPlus/s7netplus) | IDriver, ITagDiscovery, IReadable, IWritable, ISubscribable, IHostConnectivityProbe | Single S7netplus `Plc` instance per PLC serialized with `SemaphoreSlim` — the S7 CPU's comm mailbox is scanned at most once per cycle, so parallel reads don't help | | [AB CIP](AbCip.md) | `Driver.AbCip` | A | libplctag CIP | IDriver, ITagDiscovery, IReadable, IWritable, ISubscribable, IHostConnectivityProbe, IPerCallHostResolver, IAlarmSource | ControlLogix / CompactLogix. Tag discovery uses the `@tags` walker to enumerate controller-scoped + program-scoped symbols; UDT member resolution via the UDT template reader | | [AB Legacy](AbLegacy.md) | `Driver.AbLegacy` | A | libplctag PCCC | IDriver, ITagDiscovery, IReadable, IWritable, ISubscribable, IHostConnectivityProbe, IPerCallHostResolver | SLC 500 / MicroLogix. File-based addressing (`N7:0`, `F8:0`) — no symbol table, tag list is user-authored in the config DB | -| [TwinCAT](TwinCAT.md) | `Driver.TwinCAT` | B | Beckhoff `TwinCAT.Ads` (`TcAdsClient`) | IDriver, ITagDiscovery, IReadable, IWritable, ISubscribable, IHostConnectivityProbe, IPerCallHostResolver | The only native-notification driver outside Galaxy — ADS delivers `ValueChangedCallback` events the driver forwards straight to `ISubscribable.OnDataChange` without polling. Symbol tree uploaded via `SymbolLoaderFactory` | +| [TwinCAT](TwinCAT.md) | `Driver.TwinCAT` | B | Beckhoff `TwinCAT.Ads` (`TcAdsClient`) | IDriver, ITagDiscovery, IReadable, IWritable, ISubscribable, IHostConnectivityProbe, IPerCallHostResolver, IRediscoverable | The only native-notification driver outside Galaxy — ADS delivers `ValueChangedCallback` events the driver forwards straight to `ISubscribable.OnDataChange` without polling. Symbol tree uploaded via `SymbolLoaderFactory` | | [FOCAS](FOCAS.md) | `Driver.FOCAS` | A | Pure-managed `FocasWireClient` — FOCAS/2 Ethernet binary protocol on TCP:8193, inlined into the driver assembly | IDriver, ITagDiscovery, IReadable, IWritable, ISubscribable, IHostConnectivityProbe, IPerCallHostResolver, IAlarmSource | `IWritable` is implemented but read-only by design — `WriteAsync` returns `BadNotWritable` for every point. CNC-shaped data model (axes, spindle, PMC, macros, alarms) not a flat tag map. Previously Tier-C (Host + P/Invoke + shim DLL); retired in the 2026-04-24 migration when the managed wire client landed | | [OPC UA Client](OpcUaClient.md) | `Driver.OpcUaClient` | B | OPCFoundation `Opc.Ua.Client` | IDriver, ITagDiscovery, IReadable, IWritable, ISubscribable, IAlarmSource, IHistoryProvider, IHostConnectivityProbe | Gateway/aggregation driver — the only driver implementing driver-side `IHistoryProvider` (forwards HistoryRead to the upstream server). Opens a single `Session` against a remote OPC UA server and re-exposes its address space. Owns its own `ApplicationConfiguration` (distinct from `Client.Shared`) because it's always-on with keep-alive + `TransferSubscriptions` across SDK reconnect, not an interactive CLI | | [Historian.Wonderware](Historian.Wonderware.md) | `Driver.Historian.Wonderware` (+ `.Client`, `.Client.Contracts`) | — | `aahClientManaged` write SDK + AVEVA Historian SQL, over a pipe IPC backend | IHistorianDataSource (server-side historian sink) | Not a tag driver — a historian backend that registers `IHistorianDataSource` (`HistorianDataSource : IHistorianDataSource`) to satisfy HistoryRead and to sink tag/alarm history. No `IDriver`/`ITagDiscovery` surface |