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AcuraGlobal Wavetrend L-A210 User Manual
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ACURA’sRX210 User Manual Page 17 of 355 Protocols and AddressingAs mentioned earlier data flowing on this network have a specific packet format. Thisformat is defined as follows:5.1 Command Packets0xA Data Network Receiver Node Command Data ChecksumAll bytes are HEX Values1. Header 1 Byte [0xAA]2. Length 1 Byte (Number of Bytes in data section)3. Network ID 1 Byte4. Receiver ID 1 Byte5. Node ID 1 Byte6. Command 1 Byte7. Data Up to 64 Bytes of Data8. Checksum 1 ByteCHECKSUM = [Length] XOR [Receiver ID] XOR [Token ID] XOR [Command ID] XOR [Data]…XOR[Data]5.2 Response Packets0x5 Data Network Receiver Node Command Data ChecksumAll bytes are HEX values.9. Header 1 Byte [0x55]10. Length 1 Byte (Number of Bytes in data section)11. Network ID 1 Byte12. Receiver ID 1 Byte13. Node ID 1 Byte14. Command 1 Byte15. Data Up to 64 Bytes of Data16. Checksum 1 Byte (XOR from Length to Last Data Byte),CHECKSUM = [Length] XOR [Receiver ID] XOR [Token ID] XOR [Command ID] XOR [Data]…XOR[Data]Command and Response packets are essentially identical except for the header character. Thisdifferent header character enables equipment receiving all the data to differentiate between commandand response packets. Since the RS232 port presents all the data at all times, it will be necessary hereto be able to differentiate between these packets. |
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