Modbus ASCII Longitudinal Redundancy Check (LRC)
Computes and verifies Modbus ASCII frame Longitudinal Redundancy Check (LRC).
Notice: engineering verification utility. Use test or de-identified data and verify results independently before relying on them.
How it works
Standard: Modbus over Serial Line Specification v1.02
Formula: Sum all bytes, take two's complement of the lower 8 bits
Checks: Hex ASCII payload check; trailing LRC verification
Calculated locally in browser memory; nothing leaves your browser.
Deterministic local-first client-side execution. Provided as-is without warranty.