Set the active LASAL project by directory path. Call first — all other tools default to this project.

Check project selection, station discovery, PLC/HMI reachability, engine paths, running processes, and HMI runtime health. Call to orient or diagnose connection issues.

Poll the status of a background job started with async: true (build_project, deploy_all, deploy_solution, lse_project). Omit jobId to list recent jobs.

Read-only inventory of the CLASS 2 project: classes (name, channels, tasks), networks and objects, from the .lcp manifest and class sources. Use it to plan changes before apply_project_changes.

Scan a LASAL station project for duplicate GUID collisions and uninitialized TO_UDINT(0) placeholders in classes. Auto-resolves duplicate GUID collisions (generating fresh GUIDs and updating MaeExp.txt/xml) and populates exact LASAL CRC32 @CT_ hashes. Also cleans dangling network metadata.

Read or write a CLASS 2 class source (.st) by class name, with optional .h access. Writes are latin1-validated and require the CLASS 2 IDE to be closed.

Update the target IP/port/SSL of a station in its .lss (surgical edit, other settings preserved). Use when a station moved networks; connection strings can also be passed per call.

Open or close the LASAL CLASS 2 IDE GUI. Close before running batch operations.

Open or close the VISUDesigner GUI. Close before running automated visu operations.

Open or close the LASAL SCREEN (LSE) editor for .lpr screen projects. Close before running lse_project automation (releases .lpr file locks).

Compile the CLASS 2 project or download it to the PLC. Compilation kills CLASS 2 IDE. Download pings the PLC first. Supports async: true — the call then returns immediately with a jobId and you MUST poll check_job_status until it reports status completed/failed (the result is delivered there).

Create a CLASS 2 bootdisk (update stick): plain bootdisk or the full Update-Tool flavor with update script, Autoexec.lsl, LasalOS image, VISUDesigner publish folder and MultiMaster Stations.txt. Platform AUTO/ALL/ARM/X86.

Start, stop, or query PLC runtime state. Pings the target PLC before start/stop.

Read or write live channel values on a running PLC. Channels use 'ObjectName.ChannelName' format. Auto-coerces types based on ST declarations.

Run CLASS 2 batch engine operations that cannot be done by editing files directly: create/delete/rename networks, add/remove/rename objects, create/delete connections, set init values, configure tasks, compile, download. Kills CLASS 2 IDE before running.

Escape hatch: run arbitrary Python 2.7 batch statements through Lasal2.exe (module batch, project prj in scope). Use for batch API calls not covered by apply_project_changes; the project is NOT saved automatically.

Run PLC diagnostics: trace recording, file upload/download/delete on PLC, or static code analysis.

Manage local LARS (LASAL Runtime System) simulation instances. LARS runs one program per instance — use one workspace per station (PLC + HMI) so both run simultaneously on separate ports. Actions: list (auto-cleans stale workspaces), setup (create workspaces for all stations), start (auto-creates the workspace if the station is known but unconfigured), stop, remove, gc (lazy cleanup of unreferenced workspaces), set_station_target (point a station's .lss at its LARS instance), restore (revert .lss to the real target. After set_station_target, build_project/control_plc/plc_values/deploy_all operate on the LARS instance automatically.

Run VISUDesigner engine operations: update stations, publish, manage text lists/schemes/media/code modules, set datapoint properties, or download to HMI. These need the VISUDesigner engine — for direct dashboard JSON editing, edit the files in the project directly.

Run LASAL SCREEN (LSE) engine operations on a .lpr screen project via the LASALScreen COM automation: info (screens/windows/servers/text lists/languages/settings inventory), create (fresh project), compile (Runtime output folder), download to a panel (Download & Run), and apply_changes with granular operations: merge/fuse projects, export_xml/import_xml text round-trips, import_variables (CLASS 2 references), textlist_* translations, server_get_property/server_set_property (limits, unit, menu, state schema, hostname, …), bulk update_buttons/update_softkeys theming, settings_set (resolution/compiler/online), image_insert. The .lpr itself is binary — never edit it directly; use this tool or the editor. Supports async: true — the call then returns immediately with a jobId and you MUST poll check_job_status until it reports status completed/failed (the result is delivered there).

Full deploy pipeline: compile → download PLC → start PLC → verify state → compile LASAL SCREEN (.lpr, when present) → optional SCREEN download → update Visu stations → download Visu → start HMI runtime. Each step is optional via flags. Supports async: true — the call then returns immediately with a jobId and you MUST poll check_job_status until it reports status completed/failed (the result is delivered there).

Multi-station deploy via MachineManager: generates a .lutc update file from the solution (class2/screen/visu downloads, OS updates, file transfers, run/boot, channel writes, CLI commands) and executes it with MachineManager.exe /update. This is the official flow for pushing LASAL SCREEN projects together with CLASS 2 to the same panel. Use dry_run to review the generated .lutc first. The newest MachineManager per-run log is returned with the result. Supports async: true — the call then returns immediately with a jobId and you MUST poll check_job_status until it reports status completed/failed (the result is delivered there).

Start, stop, or check the local HMI web simulation (LasalVISUDataService). Publishes the project, copies webroot, and spawns the DataService. Returns the accessible HTTP URL (e.g. for testing via Playwright MCP or opening in a browser).