Danfoss FC 300 Profibus Manual page 48

FC 300 Profibus
Axis
The axis attribute should be set to zero.
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.
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).
Attribute Value (10H)
The attribute value permits reading or writing of parameter values.
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 Meaning
1 Identifier ID
2 Number of array elements or
length or string
3 Standardization factor
4 Variable attribute
5 Reserved
6 Name
7 Lower limit
8 Upper limit
9 Reserved
10 ID extension
11 PCD reference parameter
12 PCD normalization
0 Complete description
In the following each description element is explained.
Identifier ID
Additional characteristics of a parameter.
Bit Meaning
15 Reserved
14 Array
13 Parameter value can be reset only
12 Parameter has been changed from
factory setting
11 Reserved
10 Additional text array available
9 Parameter is read-only
8 Standardizaton factor and variable
attribute not relevant
0-7 Data type
Number of Array Elements
Contains the number of array elements, if the parameter is an array; the string length, if the parameter
value is a string; or 0 if the parameter is neither.
48
How to Access FC 300 Parameters
MG.33.C2.02 - VLT is a registered Danfoss trademark
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