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Joseph Doherty a7576ffb38 Implement LmxOpcUa server — all 6 phases complete

Full OPC UA server on .NET Framework 4.8 (x86) exposing AVEVA System
Platform Galaxy tags via MXAccess. Mirrors Galaxy object hierarchy as
OPC UA address space, translating contained-name browse paths to
tag-name runtime references.

Components implemented:
- Configuration: AppConfiguration with 4 sections, validator
- Domain: ConnectionState, Quality, Vtq, MxDataTypeMapper, error codes
- MxAccess: StaComThread, MxAccessClient (partial classes), MxProxyAdapter
  using strongly-typed ArchestrA.MxAccess COM interop
- Galaxy Repository: SQL queries (hierarchy, attributes, change detection),
  ChangeDetectionService with auto-rebuild on deploy
- OPC UA Server: LmxNodeManager (CustomNodeManager2), LmxOpcUaServer,
  OpcUaServerHost with programmatic config, SecurityPolicy None
- Status Dashboard: HTTP server with HTML/JSON/health endpoints
- Integration: Full 14-step startup, graceful shutdown, component wiring

175 tests (174 unit + 1 integration), all passing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-25 05:55:27 -04:00

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OPC UA CLI Tool (.NET)

Command-line utility for testing OPC UA server functions. Built with the OPC Foundation UA .NET Standard client library and CliFx.

Runtime: .NET 10
OPC UA Client: OPCFoundation.NetStandard.Opc.Ua.Client

Build & Run

cd tools/opcuacli-dotnet
dotnet build
dotnet run -- <command> [options]

Commands

connect

Test connection to an OPC UA server:

dotnet run -- connect -u opc.tcp://localhost:4840

Flag	Description
`-u`	OPC UA server endpoint URL (required)

read

Read a value from a node:

dotnet run -- read -u opc.tcp://localhost:4840 -n "ns=2;s=MyNode"

Flag	Description
`-u`	OPC UA server endpoint URL (required)
`-n`	Node ID to read (required)

write

Write a value to a node (auto-detects the data type from the current value):

dotnet run -- write -u opc.tcp://localhost:4840 -n "ns=2;s=MyNode" -v 42

Flag	Description
`-u`	OPC UA server endpoint URL (required)
`-n`	Node ID to write to (required)
`-v`	Value to write (required)

Monitor a node for value changes:

dotnet run -- subscribe -u opc.tcp://localhost:4840 -n "ns=2;s=MyNode" -i 500

Flag	Description
`-u`	OPC UA server endpoint URL (required)
`-n`	Node ID to monitor (required)
`-i`	Polling interval in milliseconds (default: 1000)

browse

Browse the OPC UA address space:

# Browse top-level Objects folder
dotnet run -- browse -u opc.tcp://localhost:4840

# Browse a specific node
dotnet run -- browse -u opc.tcp://localhost:4840 -n "ns=2;s=MyFolder"

# Browse recursively (depth 3)
dotnet run -- browse -u opc.tcp://localhost:4840 -r -d 3

Flag	Description
`-u`	OPC UA server endpoint URL (required)
`-n`	Node ID to browse (default: Objects folder)
`-d`	Maximum browse depth (default: 1)
`-r`	Browse recursively using `--depth` as max depth

Example: Testing the LmxOpcUa Server

cd tools/opcuacli-dotnet

# Connect to the local OPC UA server
dotnet run -- connect -u opc.tcp://localhost:4840

# Browse the address space
dotnet run -- browse -u opc.tcp://localhost:4840 -r -d 3

# Read a tag value
dotnet run -- read -u opc.tcp://localhost:4840 -n "ns=2;s=TestMachine_001.SomeAttribute"

# Subscribe to live updates
dotnet run -- subscribe -u opc.tcp://localhost:4840 -n "ns=2;s=TestMachine_001.SomeAttribute" -i 500

Example: Testing with the OPC PLC Sample Server

# Start the sample server (from another terminal)
cd tools/opcsampleserver/publish
dotnet opcplc.dll --pn=50000 --autoaccept --unsecuretransport

# Browse the sample server
dotnet run -- browse -u opc.tcp://localhost:50000 -r -d 2

# Read a sample node
dotnet run -- read -u opc.tcp://localhost:50000 -n "ns=2;s=SlowUInt1"

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