What specific error checking mechanism does Modbus RTU employ for transmission integrity?
Answer
Cyclic Redundancy Check (CRC)
Modbus RTU utilizes the Cyclic Redundancy Check (CRC) as its method for error detection. CRC is recognized as a mathematically robust technique designed to detect transmission errors that occur during data transfer over serial lines. This superior error detection capability is one of the reasons why the RTU variant often became the preferred standard over Modbus ASCII for serial industrial communication, as LRC, used by ASCII, is considered much simpler and less rigorous.
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