GE Industrial Solutions AF-600 FP Profibus DP - Manual (Page 47)

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)
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 message. 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 Data Type
1 Identifier ID V2
2 Number of array elements or length or string U16
3 Standardization factor float
4 Variable attribute Octet string 2
5 Reserved Octet string 4
6 Name Visible string 16
7 Lower limit Octet string 4
8 Upper limit Octet string 4
9 Reserved Octet string 2
10 ID extension V2
11 PCD reference parameter U16
12 PCD normalization V2
0 Complete description Octet string 46
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
AF-650 GP/AF-600 FP Profibus DP Operating Instructions
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