Danfoss iC2, Инструкция по применению

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Application Guide | iC2-Micro Frequency Converters
6.1.6.2.9
Index (IND)
The index is used with the parameter number to read/write access parameters with an index, for example, P 6.1.1 Latest Fault Number .
The index consists of 2 bytes: a low byte and a high byte. Only the low byte is used as an index.
6.1.6.2.10
Parameter Value (PWE)
The parameter value block consists of 2 words (4 bytes), and the value depends on the defined command (AK). The master prompts for a
parameter value when the PWE block contains no value. To change a parameter value (write), write the new value in the PWE block and
send from the master to the follower.
When a follower responds to a parameter request (read command), the present parameter value in the PWE block is transferred and
returned to the master. If a parameter contains several data options, select the data value by entering the value in the PWE block. Serial
communication is only capable of reading parameters containing data type 9 (text string).
P 6.7.1 FC Type to P 6.7.9 Power Card Serial Number contain data type 9. For example, read the unit size and mains voltage range in
P
6.7.1 FC Type
. When a text string is transferred (read), the length of the telegram is variable, and the texts are of different lengths. The
telegram length is defined in the 2nd byte of the telegram (LGE). When using text transfer, the index character indicates whether it is a
read or a write command.
To read a text via the PWE block, set the parameter command (AK) to F hex. The index character high-byte must be 4.
6.1.6.2.11
Data Types Supported by the Drive
Table 28: Data Types
Data types Description
3 Integer 16
4 Integer 32
5 Unsigned 8
(1)
(1)
6 Unsigned 16
(1)
7 Unsigned 32
(1)
9 Text string
10 Byte string
13 Time difference
33 Reserved
35 Bit sequence
1) Unsigned means that there is no operational sign in the telegram.
6.1.6.2.12
Conversion
The application guide contains the descriptions of attributes of each parameter. Parameter values are transferred as whole numbers only.
Conversion factors are used to transfer decimals.
P 5.8.3 Motor Speed Low Limit [Hz] has a conversion factor of 0.1. To preset the minimum frequency to 10 Hz, transfer the value 100. A
conversion factor of 0.1 means that the value transferred is multiplied by 0.1. The value 100 is thus perceived as 10.0.
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