Vacon 100 Hvac User Manual

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Vacon 100 Hvac User Manual Manual pdf 32 page image

6vacon • 30 CommunicationsTel. +358 (0) 201 2121 • Fax +358 (0)201 212 2056.3 Modbus data mapping6.3.1 Coils registersA "coil" in Modbus is a single-bit binary data item which can be both read and written. In Vacon® 100the coils refer to some bits in the fieldbus control word." See page 33.Table 14. Defined coil registers6.3.2 Discrete inputsA "discrete input" in Modbus is a single-bit binary data item which is read-only. In Vacon 100 thediscrete inputs refer to the fieldbus status word bits. See page 36.Table 15. Defined Input Discrete6.3.3 Holding registers and input registersAn "input register" in Modbus is a 16-bit value which is read-only. A "holding register" in Modbus isa 16-bit value which can be both read and written. Holding and input registers are accessed usingdifferent function codes, and the address ranges are different. In Vacon 100 the same informationcan be accessed as input registers and holding registers, i.e. input register X refers to the same 16-bit value as the holding register X.The Modbus registers are mapped to the Vacon 100 drive as followsAddress Function Purpose0001 RUN/STOP Control Word, bit 00002 Direction Control Word, bit 10003 Fault reset Control Word, bit 2Address Function Purpose10001 Ready Status Word, bit 010002 Run Status Word, bit 110003 Direction Status Word, bit 210004 Fault Status Word, bit 310005 Alarm Status Word, bit 410006 At reference Status Word, bit 510007 Zero speed Status Word, bit 610008 Flux ready Status Word, bit 7