Joseph Doherty
26833073ca
CODE-REALITY (matrix corrected against driver class declarations):
- Galaxy: GalaxyDriver.cs:38-39 implements IDriver, ITagDiscovery,
IReadable, IWritable, ISubscribable, IRediscoverable,
IHostConnectivityProbe, IAlarmSource. Removed the bogus
IHistoryProvider (no IHistoryProvider refs anywhere in the Galaxy
project); added the missing IRediscoverable. Replaced the stale
out-of-process Host/Proxy/named-pipe quirk + the dead
`Driver.Galaxy.{Shared,Host,Proxy}` path: per CLAUDE.md PR 7.2 those
retired; the real driver is in-process .NET 10 over gRPC to the
external mxaccessgw gateway (GalaxyDriver.cs:20-21 doc comment).
Project path corrected to Driver.Galaxy (+ .Browser, .Contracts).
- Modbus: ModbusDriver.cs:21-22 — added missing IPerCallHostResolver.
- FOCAS: FocasDriver.cs:20-21 — added missing IWritable (it IS
implemented; WriteAsync returns BadNotWritable for every point,
FocasDriver.cs:317).
- S7 (S7Driver.cs:31-32), AbCip (AbCipDriver.cs:27-28),
AbLegacy (AbLegacyDriver.cs:13-14, no IAlarmSource confirmed),
TwinCAT (TwinCATDriver.cs:13-14), OpcUaClient
(OpcUaClientDriver.cs:31) verified — already correct.
- Added the 9th family Historian.Wonderware as a server-side historian
sink (HistorianDataSource.cs:19 `: IHistorianDataSource`), and added
IHistorianDataSource to the capability-interface list.
- Clarified OpcUaClient as the only driver-side IHistoryProvider; fixed
the HistoricalDataAccess cross-ref accordingly (the Aveva Historian
path is the Wonderware IHistorianDataSource sink, not a Galaxy
IHistoryProvider).
- Added an alarm-source roster to the AlarmTracking cross-ref.
STRUCTURAL (4 dead links repointed to the docs/v1 archive, all verified
to exist):
- ../HistoricalDataAccess.md -> ../v1/HistoricalDataAccess.md (x2)
- ../Subscriptions.md -> ../v1/Subscriptions.md
- Galaxy-Repository.md -> ../v1/drivers/Galaxy-Repository.md
- Galaxy-Test-Fixture.md -> ../v1/drivers/Galaxy-Test-Fixture.md
check_links.py now reports zero rows for docs/drivers/README.md.
STALE-STATUS: removed out-of-process/named-pipe Galaxy wording; noted
native MxAccess alarms work end-to-end; dropped the FOCAS "Tier-C
two-project deployment" phrasing from the per-driver section.
OtOpcUa
OPC UA server (.NET 10 AnyCPU) that exposes a fleet of industrial drivers as a single OPC UA address space. Drivers ship in-process for AVEVA System Platform Galaxy (via the sibling mxaccessgw repo), Modbus TCP, Siemens S7, Allen-Bradley CIP (ControlLogix / CompactLogix), Allen-Bradley Legacy (SLC 500 / MicroLogix), Beckhoff TwinCAT (ADS), FANUC FOCAS, and OPC UA Client (gateway).
A cross-platform client stack (.NET 10) — shared library, CLI, and Avalonia desktop app — connects to any OPC UA server.
Architecture
OPC UA Clients (CLI, Desktop UI, 3rd-party)
|
v
+-------------------------------------+
| OtOpcUa.Server (.NET 10 AnyCPU) |
| address space + capability fan-out|
+-------------------------------------+
| | | | | | | |
Galaxy Modbus S7 AbCip AbLeg TwinCAT FOCAS OpcUaClient
|
v
mxaccessgw (sibling repo, gRPC)
|
v
MXAccess COM (x86 worker, on AVEVA box)
Galaxy is the only driver with an external runtime: it speaks gRPC to a separately installed mxaccessgw server (sibling repo at c:\Users\dohertj2\Desktop\mxaccessgw\) which owns the MXAccess COM apartment and the x86/STA bitness constraint server-side. Everything in this repo is platform-agnostic .NET 10.
Prerequisites
- .NET 10 SDK (server, drivers, clients all target .NET 10)
- SQL Server reachable for the central config DB
- For Galaxy specifically: a running
mxaccessgwdeployment — see docs/v2/Galaxy.ParityRig.md - For Wonderware Historian read-back: optional
OtOpcUaWonderwareHistoriansidecar — see docs/ServiceHosting.md
Quick Start
dotnet restore ZB.MOM.WW.OtOpcUa.slnx
dotnet build ZB.MOM.WW.OtOpcUa.slnx
dotnet test ZB.MOM.WW.OtOpcUa.slnx
# Run the server in dev (foreground)
dotnet run --project src/Server/ZB.MOM.WW.OtOpcUa.Server
The server starts on opc.tcp://localhost:4840 with the None security profile. Configure Security.Profiles in src/Server/ZB.MOM.WW.OtOpcUa.Server/appsettings.json to enable Basic256Sha256-Sign or Basic256Sha256-SignAndEncrypt. See docs/security.md.
Install as Windows Services
Production deployment is driven by scripts/install/Install-Services.ps1, which registers the OtOpcUa server service (and optionally the OtOpcUaWonderwareHistorian sidecar) under a chosen service account. Galaxy support requires a separately installed mxaccessgw — neither this repo nor the install script provisions it.
.\scripts\install\Install-Services.ps1 `
-InstallRoot 'C:\Program Files\OtOpcUa' `
-ServiceAccount 'DOMAIN\svc-otopcua'
Add -InstallWonderwareHistorian for the historian sidecar. See the script header and docs/ServiceHosting.md for full options.
Client CLI
dotnet run --project src/Client/ZB.MOM.WW.OtOpcUa.Client.CLI -- connect -u opc.tcp://localhost:4840
dotnet run --project src/Client/ZB.MOM.WW.OtOpcUa.Client.CLI -- browse -u opc.tcp://localhost:4840 -r -d 3
dotnet run --project src/Client/ZB.MOM.WW.OtOpcUa.Client.CLI -- read -u opc.tcp://localhost:4840 -n "ns=2;s=SomeNode"
dotnet run --project src/Client/ZB.MOM.WW.OtOpcUa.Client.CLI -- write -u opc.tcp://localhost:4840 -n "ns=2;s=SomeNode" -v 42
dotnet run --project src/Client/ZB.MOM.WW.OtOpcUa.Client.CLI -- subscribe -u opc.tcp://localhost:4840 -n "ns=2;s=SomeNode" -i 500
See docs/Client.CLI.md and docs/Client.UI.md.
Documentation
Architecture deep-dives
| Topic | Doc |
|---|---|
| OPC UA server composition, namespace fan-out, Polly invoker | docs/OpcUaServer.md |
| Address space layout | docs/AddressSpace.md |
| Read / Write dispatch (driver vs virtual vs scripted-alarm) | docs/ReadWriteOperations.md |
| Incremental sync (driver-backend rediscovery + config publishes) | docs/IncrementalSync.md |
| Service hosting (Server + Admin + optional historian sidecar) | docs/ServiceHosting.md |
| Security (transport, LDAP, certificates) | docs/security.md |
| Redundancy | docs/Redundancy.md |
| Status dashboard | docs/StatusDashboard.md |
Drivers
| Topic | Doc |
|---|---|
| Driver specs (per-driver capability surface, config, addressing) | docs/v2/driver-specs.md |
| Galaxy driver | docs/drivers/Galaxy.md |
| Modbus / S7 / AbCip / AbLegacy / TwinCAT / FOCAS / OpcUaClient | docs/drivers/ |
| Galaxy parity rig (mxaccessgw setup) | docs/v2/Galaxy.ParityRig.md |
| Galaxy performance + tracing | docs/v2/Galaxy.Performance.md |
Clients
| Topic | Doc |
|---|---|
| Client CLI | docs/Client.CLI.md |
| Client UI (Avalonia desktop) | docs/Client.UI.md |
v1 archive
The original v1 in-process MXAccess docs (Galaxy.Host topology, Configuration env vars, AlarmTracking, DataTypeMapping, HistoricalDataAccess, Subscriptions, etc.) are preserved under docs/v1/ — historical reference only. PR 7.2 retired the v1 architecture on 2026-04-30; current state is documented in the sections above.
License
Internal use only.