Vacon 100 HVAC, User Manual

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6
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6.3 Modbus data mapping
6.3.1 Coils registers
A "coil" in Modbus is a single-bit binary data item which can be both read and written. In Vacon
®
100
the coils refer to some bits in the fieldbus control word." See page 33.
Table 14. Defined coil registers
6.3.2 Discrete inputs
A "discrete input" in Modbus is a single-bit binary data item which is read-only. In Vacon 100 the
discrete inputs refer to the fieldbus status word bits
. See page 36.
Table 15. Defined Input Discrete
6.3.3 Holding registers and input registers
An "input register" in Modbus is a 16-bit value which is read-only. A "holding register" in Modbus is
a 16-bit value which can be both read and written. Holding and input registers are accessed using
different function codes, and the address ranges are different. In Vacon 100 the same information
can 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 follows
Address Function Purpose
0001 RUN/STOP Control Word, bit 0
0002 Direction Control Word, bit 1
0003 Fault reset Control Word, bit 2
Address Function Purpose
10001 Ready Status Word, bit 0
10002 Run Status Word, bit 1
10003 Direction Status Word, bit 2
10004 Fault Status Word, bit 3
10005 Alarm Status Word, bit 4
10006 At reference Status Word, bit 5
10007 Zero speed Status Word, bit 6
10008 Flux ready Status Word, bit 7