- HeidenhainControlFamily + HeidenhainControlFamilies.Classify (Contracts): one authority, ported from
pyLSV2 (MIT) dat_cls.py VersionInfo.control (strip spaces, case-insensitive prefix, ITNC530 first).
Families: ITnc530, Tnc (640/620/320/128), Tnc7, Lathe (CNC PILOT 640 / MANUALplus 620), MillPlus,
LegacyTnc (426/430, not a pyLSV2 class), Unknown.
- New additive read-only leaf Controller/Family (String, Identity feature, derived from the same R_VR
reply: no extra request). Lsv2Versions.Family is computed, so record equality and the #831
identity-change rediscovery signal are unchanged. Probe message + /hosts diagnostics (<host>.family).
- DATA gate now goes through SupportsDataPath(family) (pyLSV2 client.py read_data_path is iTNC-only):
non-iTNC and Unknown => Capabilities/DataLogin Unsupported, DATA login never sent. Replaces the
"model contains itnc" substring check (same result on the real iTNC530 controls).
- No per-family selector pre-gates: pyLSV2's TNC 640 observations (27/28/51/30-34 unknown telegram,
25/26 need DNC) are already handled by the reply-driven refusal/suppression path; tests pin it.
- Lsv2ReadOnlyPolicy, HeidenhainTagWritable and the no-IWritable rule are untouched.
- Simulator: per-family ControlProfiles (strings from the pyLSV2 README tables / protocol.rst), both
R_VR field counts, 124-byte R_PR; HeidenhainControlFamilyTests (classification, gates, decoding,
wire log inside the read-only set, refused selectors asked once).
- docs/drivers/Heidenhain.md: Control families matrix (iTNC 530 hardware-proven; the rest per pyLSV2,
hardware-unproven) + open questions (C_CC buffer size, encrypted passwords, R_RI 20/21).
Claude-Session: https://claude.ai/code/session_01GT67AD99zQQqpLCVm3p7xk
Native LSV2 TCP transport (default port 19000; no Java/Python/vendor SDK), ported from
the ignitionoee v0.20.3 reference driver:
- Lsv2ReadOnlyPolicy: payload-aware outbound allowlist (A_LG INSPECT/DNC/DATA, R_VR, R_PR,
R_RI 22-28/30-34/51, bounded R_MB, R_DP), applied in Lsv2Codec.Frame before any byte is
written; no public raw-command API.
- Lsv2Client: serialized transactions, one monotonic deadline per transaction, EOF/oversize/
unexpected/trickle close the client; Close never waits on the gate.
- Lsv2Data / HeidenhainBindingCodec: reference decoders, R_PR byte-capacity + element-index
rules, next-area cap, DATA Boolean 00/01/FF, strict non-truncating coercion.
- HeidenhainSession: per-batch wire cache, refusal suppression, provisional DNC denial retry,
alarm cursor (57 = end, overflow = BadOutOfRange), capability strings.
- HeidenhainDeviceRuntime: one loop per control, generation-guarded publication, all-node
BadNoCommunication on comms loss, bounded exponential reconnect.
- HeidenhainDriver: cached ReadAsync, push subscriptions deduped on (value,status), static
catalog discovery (no connect), host status, diagnostics, skipped-tag report. No IWritable.
- Probe (INSPECT login + version) and factory registered in DriverFactoryBootstrap (probe on
admin nodes too); DriverTypeNames.Heidenhain.
Tests: 159 unit tests against an in-process LSV2 simulator incl. the Java fixtures' captured
iTNC 530 replies as golden vectors; env-gated LiveIntegration category for real hardware.
Joseph Doherty