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VLT® Profibus
5. How to Access the Parameters
5.2.14. Number of Parameters
For multi-parameter requests specifying the number of the Parameter Address and/or Parameter
Value areas. For a single request the number is 1.
5.2.15. Attribute
The attribute determines which kind of data to access. The frequency converter will respond to
the attributes Value (10H), Description (20H) and Text (30H).
5.2.16. Attribute Value (10H)
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The attribute value permits reading or writing of parameter values.
5.2.17. Attribute Description (20H)
The attribute description permits access to the parameter description. It is possible to read out
one single description element, or all elements for one parameter in one telegram. The table below
provides an overview of the existing Parameter Description, which exists for each parameter in
the frequency converter.
Parameter description elements (all elements are read-only):
Sub-index
1
2
3
4
5
6
7
8
9
10
11
12
0
Meaning
Identifier ID
Number of array elements or
length or string
Standardization factor
Variable attribute
Reserved
Name
Lower limit
Upper limit
Reserved
ID extension
PCD reference parameter
PCD normalization
Complete description
Data Type
V2
U16
float
Octet string 2
Octet string 4
Visible string 16
Octet string 4
Octet string 4
Octet string 2
V2
U16
V2
Octet string 46
In the following each description element is explained.
Identifier ID
Additional characteristics of a parameter.
MG.33.C4.02 - VLT® is a registered Danfoss trademark
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