Latest communication verification
Live-device verification for plc-comm-mcprotocol-serial-cpp is summarized here. Detailed command evidence, target-dependent notes, and retained raw observations are maintained in the linked validation reports.
Latest verified set
| PLC / CPU | Serial module | Canonical profile | Transport | Verified scope | Limitations | Record |
|---|---|---|---|---|---|---|
MELSEC iQ-R R120PCPU |
RJ71C24-R2 |
melsec:q-l, melsec:iq-r |
RS-232C, MC Protocol serial | CPU model, loopback, device-family probes, contiguous read/write, random, multi-block, monitor, host/module buffer, qualified helper, remote control, and user-frame paths. | Some ASCII 2C and native qualified paths are target-dependent or diagnostic-only; use the report for frame/profile details. |
RJ71C24-R2 RS-232C report |
MELSEC iQ-R R08CPU |
RJ71C24-R2 |
melsec:iq-r |
RS-232C, MC Protocol serial | Focused rechecks for LZ1, remote latch clear, and remote password behavior on 2026-06-12. |
Remote password lock/unlock remains target-dependent; read-only sanity checks stayed available. | RJ71C24-R2 RS-232C report |
MELSEC iQ-F FX5UC-32MT/D |
Built-in serial path | melsec:q-l |
RS-232C, MC Protocol serial | CPU model, validated contiguous subset, supported-device soak, random, and multi-block paths. | Host/module buffer, qualified helper/native access, DX, DY, V, ZR, and monitor are unsupported or not applicable on this serial path. |
FX5UC-32MT/D RS-232C report |
MELSEC L-series L26CPU-BT |
LJ71C24 |
melsec:q-l |
RS-232C, MC Protocol serial | CPU model, contiguous read/write, supported-device soak, random, multi-block, monitor, host/module buffer, and qualified helper paths. | Native qualified access is outside the supported path; helper access is the retained path. | LJ71C24 RS-232C report |
MELSEC Q-series Q06UDVCPU |
QJ71C24N |
melsec:q-l |
RS-232C, MC Protocol serial | CPU model, contiguous read/write, supported-device soak, random, multi-block, monitor, host/module buffer, and qualified helper paths. | Native qualified access is outside the supported path; helper access is the retained path. | QJ71C24N RS-232C report |
Retained evidence
Use the maintainer validation archive for:
- current target matrices and stress snapshots
- exact serial settings used during retained validation
- command-family pass, target-dependent, and unsupported decisions
- links to target-specific reports
Do not move the full validation matrix into README. README should stay as the project entry point.