Latest communication verification

This page is the retained public summary for live-device checks that are referenced from the README.

Current retained summary

Date	PLC / CPU	Canonical profile	Transport	Verified scope	Limitations	Record
2026-05-02	KEYENCE KV-5000 class target	keyence:kv-5000	Host Link TCP	Device-matrix flow with 35 catalog samples and 157 completed JSONL result records.	All retained records were marked OK; the JSONL result files are not committed as public artifacts.	CHANGELOG 0.2.8
2026-05-14	KEYENCE KV-7500	keyence:kv-7000	Host Link TCP 192.168.250.100:8501	AT digital trimmer read verification: raw RD AT0.D, public high-level AT0, raw RD AT7.D, and raw RDS AT0.D 8.	AT is read-oriented in the public helper surface. Write helpers reject AT before sending; raw write returned PLC E1.	Retained maintainer note
2026-05-14	KEYENCE KV-X500 family	keyence:kv-x500	Host Link TCP	Confirmed non-target behavior for AT digital trimmer access.	KV-X500 does not expose AT; use the profile-specific public register table before adding trimmer reads.	Retained maintainer note

Practical conclusions

• The Node-RED package stores canonical profile strings such as keyence:kv-5000 and keyence:kv-7000.
• AT0 through AT7 are valid public read targets for the verified KV-7500 setup, but they are not a universal KV-family feature.
• TRM0-7 is not a drop-in replacement for AT0-7; retained raw probes returned PLC E1.

When adding a new validation result

Keep this page as the public summary. Add the date, PLC model, canonical profile, transport, verified range, limitations, and a retained note or log reference. Do not put the verification table back into README.