Modbus CRC16 Tool
Professional RTU Frame Generator & Packet Analyzer
MODBUS CRC-16
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LRC CHECKSUM
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Technical Note
The Modbus CRC-16 is calculated using the polynomial $x^{16} + x^{15} + x^2 + 1$ (0xA001). The initial value is 0xFFFF. In RTU communication, the 16-bit CRC is appended with the Low Byte first.