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Series 2000 Communications Handbook

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Contents<strong>Series</strong> <strong>2000</strong> <strong>Communications</strong> <strong>Handbook</strong>Chapter 3 MODBUS AND JBUS PROTOCOL ......................... 3-2Protocol BasicsTypical Transmission Line ActivityDevice AddressParameter AddressParameter ResolutionMode of TransmissionMessage Frame FormatCyclic Redundancy CheckExample of a CRC CalculationExample of a CRC Calculation in the ‘C’LanguageExample of a CRC Calculation in Basic LanguageFunction CodesRead N BitsRead N WordsWrite A BitWrite A WordFast Read of StatusDiagnostic LoopbackWrite N WordsError ResponseWait PeriodLatencyMessage Transmission Time3-33-43-53-53-53-63-73-83-103-123-133-143-153-173-193-213-223-253-263-283-293-293-30i-2 <strong>Series</strong> <strong>2000</strong> <strong>Communications</strong> <strong>Handbook</strong> Part No HA026230 Issue 2.0 Feb-00

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