FC 300 Profibus
How to Access FC 300 Parameters
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
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
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
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