42f41fbe5078a54ffef979b7707108aa547a4290
2 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Joseph Doherty
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dfd027ebca |
Task #146 — Modbus addressing: align type codes with Wonderware DASMBTCP + Ignition
Web verification (2026-04-25) against current vendor docs surfaced concrete grammar conflicts in the v1 suffix grammar shipped in #137. Hard cutover before the Admin UI rolls out widely so users don't paste `:I` from a Wonderware spreadsheet and silently get wrong-typed reads. Sources: - Wonderware DASMBTCP user guide https://cdn.logic-control.com/media/DASMBTCP.pdf - Ignition Modbus addressing (8.1) https://www.docs.inductiveautomation.com/docs/8.1/ignition-modules/opc-ua/opc-ua-drivers/modbus/modbus-addressing Type-code changes: | Code | Pre-#146 | Post-#146 | Vendor reference | |--------|----------|------------|------------------------------| | `:S` | (n/a) | Int16 | Wonderware DASMBTCP `S` | | `:US` | (n/a) | UInt16 | Ignition `HRUS` | | `:I` | Int16 | **Int32** | Wonderware `I` + Ignition `HRI` | | `:UI` | UInt16 | **UInt32** | Ignition `HRUI` | | `:I_64` | (n/a) | Int64 | Ignition `HRI_64` | | `:UI_64` | (n/a) | UInt64 | Ignition `HRUI_64` | | `:BCD_32`| (n/a) | BCD32 | Ignition `HRBCD_32` | Codes REMOVED (no clear vendor precedent + conflict with the new mapping): `:DI`, `:L`, `:UDI`, `:UL`, `:LI`, `:ULI`, `:LBCD`. Pre-#146 configs that use them get an "Unknown type code" diagnostic at parse time so users get a fast surface-level error rather than silent wrong-typed reads. Codes UNCHANGED (already vendor-aligned): `:BOOL`, `:F`, `:D`, `:BCD`, `:STR<n>`. Modicon 5/6-digit + mnemonic regions (HR/IR/C/DI) + bit suffix `.N` are also unchanged. Defaults: - Coils / DiscreteInputs → `BOOL` (unchanged) - HoldingRegisters / InputRegisters with no explicit type → Int16 (matches Ignition's bare `HR` default) Byte-order mnemonics (`:ABCD` / `:CDAB` / `:BADC` / `:DCBA`) are kept but documented as OtOpcUa-specific — they aren't in any major vendor's per-tag address string. Ignition uses a `-R` suffix per prefix; Wonderware configures word-order at the topic level. Tests: - 12 Type_Codes_Parse rows updated to assert the new mappings. - New Removed_Aliases_Are_Rejected (×7) confirms each pre-#146 alias now fails fast with "Unknown type code". - Worked_Example_Int16_Array uses the new `:S` code. - New Worked_Example_Int32_Array_Via_I_Code documents the `:I = Int32` vendor-alignment intent so a future "fix" doesn't accidentally regress. - Unknown_Type_Code_Rejected_With_Catalog updated to match the new error message ("Valid: BOOL, S, US, I, ..."). Docs: - docs/v2/modbus-addressing.md — table replaced with the post-#146 codes, each row cites its Wonderware / Ignition reference. New "Codes removed in #146" subsection documents the cutover. - docs/Driver.Modbus.Cli.md — example grammar list updated; explicit type-code reminder appended. 114 addressing tests + 231 driver tests still green. Solution build clean. |
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Joseph Doherty
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850b816873 |
Task #137 — Modbus per-tag suffix grammar (type / bit / byte-order / array)
Adds the full Wonderware/Kepware/Ignition-style address suffix grammar so users paste tag spreadsheets without per-tag manual translation: <region><offset>[.<bit>][:<type>[<len>]][:<order>][:<count>] Examples that now parse end-to-end: 40001 HoldingRegisters[0], Int16 400001 same, 6-digit form 40001.5 bit 5 of HR[0] 40001:F Float32 (HR[0..1]) 40001:F:CDAB word-swapped Float32 40001:STR20 20-char ASCII string HR1:DI Int32 via mnemonic region C100 Coils[99] (mnemonic) 40001:F:5 Float32[5] array (3-field shorthand) 40001:I:CDAB:10 Int16[10] word-swapped (4-field strict) Driver-side plumbing: - ModbusAddressParser + ParsedModbusAddress in the shared Addressing assembly. 91 parser tests (every grammar variant + malformed shapes). - ModbusDataType / ModbusByteOrder moved to shared (with the same namespace so callers compile unchanged). ModbusByteOrder gains ByteSwap (BADC) and FullReverse (DCBA) alongside the existing BigEndian (ABCD) and WordSwap (CDAB). - NormalizeWordOrder extended to honor all four orders for both 4-byte and 8-byte values. Old WordSwap behavior preserved bit-for-bit. - ModbusTagDefinition gains optional ArrayCount. - ReadOneAsync / WriteOneAsync handle array fan-out: one FC03/04 read covers N consecutive register-typed elements, decoded into a typed array (short[], float[], etc.). Coil arrays use FC01 reads + FC15 writes (FakeTransport in tests gains FC15 support to match). - DriverAttributeInfo IsArray / ArrayDim flow from ArrayCount so the OPC UA address space surfaces ValueRank=1 + ArrayDimensions to clients. - ModbusDriverFactoryExtensions gains AddressString DTO field. When present, the parser drives Region/Address/DataType/ByteOrder/Bit/ StringLength/ArrayCount; structured fields (Writable, WriteIdempotent, StringByteOrder) still come from the DTO. Existing structured tag rows keep working unchanged. Tests: 91 parser unit tests (Driver.Modbus.Addressing.Tests, all green) + 204 driver tests including new ModbusByteOrderTests (BADC/DCBA roundtrips across Int32/Float32/Float64) and ModbusArrayTests (Int16[5], Float32[3] CDAB, Coil[10], length-mismatch error, IsArray/ArrayDim discovery). Solution-wide build clean. Caveat: grammar names (type codes, byte-order mnemonics, the :count shorthand) were synthesized from training-era vendor docs. Verify against current Kepware Modbus Ethernet Driver Help and Ignition Modbus Addressing manuals before freezing for production deployments — naming may need a back-compat layer if vendor wording has shifted. |