2.0 KiB
2.0 KiB
Feature gaps — driver-side limitations and decisions
Cross-driver registry of known capability gaps, the workaround we ship, and whether the gap is on the roadmap. Each row links to the driver-specific deep-dive document. Closed entries stay in the table for traceability — they are not deleted, only marked.
| # | Driver | Gap | Status | Workaround / decision | Roadmap | Reference |
|---|---|---|---|---|---|---|
| 1 | S7 | Optimized DB / S7Plus — S7netplus speaks classic S7comm only and cannot read S7-1200 / S7-1500 DBs that have "Optimized block access" checked (the TIA Portal V14+ default). Absolute-offset reads against an Optimized DB return BadDeviceFailure. |
Decided — Track 1 + Track 3 (closed by #304) | Track 1 (docs): operators uncheck "Optimized block access" in TIA Portal on every DB the driver reads, recompile, and download. Track 3 (bridge): for shops that won't or can't disable Optimized access, run an OpcUaClient driver instance against the S7-1500 V2.5+ CPU's onboard OPC UA server (Siemens runtime OPC UA license required). |
Track 2 (custom S7Plus library) is out of scope unless a customer funds the ≥4-week initial implementation plus ongoing protocol-revision maintenance. Sharp7 / Snap7Net don't help — they are also classic-S7comm-only. | docs/v2/s7.md § Optimized DB constraint · docs/drivers/OpcUaClient.md |
How to read this table
- Status is one of
Open(work pending),Decided(architectural decision made; docs reflect it; no code change planned), orClosed(delivered). - Roadmap captures whether the gap is funded for the next phase. A blank cell means "no roadmap; doc-only outcome."
- The numeric # is stable — new rows append at the bottom and keep their number across deletions/edits so cross-references survive.