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ToolsModbus RTU CRC16

Modbus RTU CRC16 Calculator

Generate and verify 16-bit Cyclic Redundancy Check (CRC) values for Modbus RTU serial frame diagnostics.

Purpose & Calculation Breakdown (India)

Purpose of this Tool: Validate serial frame integrity over RS485 lines by appending standard checksum sequences.

• Modbus Polynomial:Polynomial = 0xA001 \quad \text{with Initial Register = 0xFFFF}
Enter hex message bytes (spaces optional)
Parsed Bytes Array
01 03 00 00 00 0A

CRC Checksum Results

Modbus RTU Checksum (LSB MSB)C5 CD
RTU Format
Standard CRC-16 (Hex)0xCDC5
Normal Hex
Bytes Scanned Count6
Bytes Length

Generates a formal executive feasibility proposal page ready for management sign-off & signatures.

Suggested Next Step

Need Modbus/SCADA integration support? Hire certified Remote IIoT Developers.