DNP3 Application Layer Function Code Verifier
Verifies DNP3 request and response function codes for master-outstation communications.
Notice: engineering verification utility. Use test or de-identified data and verify results independently before relying on them.
How it works
Standard: IEEE 1815 DNP3 Protocol
Formula: Lookup table mapping function code bytes (1: Read, 2: Write, 3: Select, 4: Operate, 129: Response)
Checks: Valid DNP3 function code byte
Calculated locally in browser memory; nothing leaves your browser.
Deterministic local-first client-side execution. Provided as-is without warranty.