tia-simatic-drives

Scope

Startdrive and drive-specific engineering — full C# Openness implementation.

When the roadmap routes here, the entire solution is C#. Do not mix with Python wrapper calls. Always load tia-csharp-common first (done by roadmap).

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Reference files

Reference file	Load when the task involves
references/drives-overview.md	Core patterns for Startdrive/SINAMICS engineering (Navigate, Parameters, Telegrams, DFI, Safety, Security)
references/motion-control.md	Detailed reference for Siemens.Engineering.MC namespaces (Drives, DFI, SecurityObjects, Enums)
references/download.md	Startdrive-specific and common Download/Upload check configurations
references/api-catalogue.md	Complete inventory of all 64 public types in the installed V21 Startdrive module

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Execution pattern

1. Confirm the task is drive-specific (Startdrive, SINAMICS, drive controller, PROFIdrive)
2. Read references/drives-overview.md
3. Resolve the drive device and drive object using exact selectors; recursively traverse nested device items and fail on zero or ambiguous matches
4. Get DriveObjectContainer via GetService<>() on the device item to access DriveObjects
5. Use DriveObject.Parameters for parameter access, .Telegrams for telegram find/insert/erase/size operations
6. Use GetService<DriveFunctionInterface>() for commissioning, motor/encoder config, DFI, and drive-object activation/type handling
7. For download/upload handling, include Startdrive-specific check configurations from Siemens.Engineering.Download.Configurations and Siemens.Engineering.Upload.Configurations
8. For network/PROFIdrive timing — see tia-networks/references/subnets-and-nodes.md

Safety boundary

• Require explicit live-operation authorization for online parameter writes, download/upload, factory reset, RAM-to-ROM copy, drive encryption/UMAC changes, and Safety commissioning.
• Require explicit mutation authorization for offline parameters, telegrams, drive-object type/activation, motor/encoder projection, Technology Extension install/uninstall, and report overwrite.
• Bind exact selectors to the project, device, nested DeviceItem, drive-object number, parameter name/number/index, telegram type, and requested value. Never use .First(), [0], or catalog-order assumptions.
• Inventory current parameters, telegrams, topology, safety/security state, Technology Extensions, and dependent PLC/HMI configuration before mutation. Factory reset, encryption deactivation, forced package removal, and telegram deletion are destructive.
• Inspect every boolean result and every download/upload configuration. Unknown or unsupported configurations fail closed; never approve all checks automatically.
• Secrets must arrive as SecureString from the caller's approved secret source. Never embed, print, persist, or reconstruct passwords in examples.
• Do not save: call project.Save() only when persistence was explicitly requested and post-change verification succeeded.
• Static API checks are not commissioning evidence. Online state, firmware/device support, Safety acceptance, and successful drive behavior require an authorized live V21 test.