Danfoss FC 300 Profibus Manual page 49

FC 300 Profibus
Standardization Factor
Conversion factor for scaling a given parameter value to standard SI units.
For example, if the given value is in mV, the standardization factor will be 1000, which converts the given
value to V.
The standardization factor is in Float format.
Variable Attribute
Consists of 2 bytes. The first byte contains the variable index, which defines the physical unit of the
parameter (e.g. Ampere, Volt).
The second byte is the conversion index, which is a scaling factor for the parameter. In general all parameters
accessible by PROFIBUS are organized and transmitted as real numbers. The conversion index defines a
factor for conversion the actual value to a standard physical unit. (a conversion index of -1 means, that the
actual value must be divided by 10 to become a standard physical unit e.g.. Volt.
Name
Contains the parameter name, limited to 16 characters, e.g. "LANGUAGE" for parameter 1. This text is
available in the language selected in par 1.
Lower Limit
Contains the minimum value of the parameter. Format is 32 bit signed.
Upper Limit
Contains the maximum value of the parameter. Format is 32 bit signed.
ID Extension
Not supported
PCD Reference Parameter
Process data may be scaled by a parameter, e.g. the max reference of 0x4000 (in %) depends on the
setting of parameter "X".
To enable the master to calculate the "real" value of the process data, it has to know the value of parameter
"X", and therefore the process data must deliver a reference to parameter "X".
Field PCD Normalization
The field PCD normalization must express, in any case, the value that represents the 100 %, i.e. the
normalization delivered back must be the set bit 15 and a value of 0xe (14, 2
must be 0x800e.
Complete Description
Returns the complete parameter description with the fields 1 to 12 in order. Length = 46 byte.
Attribute Text (30H)
For some frequency converter parameters a descriptive text is available, which can be read using this
attribute. The availability of a text description for a parameter is indicated by a bit set in the Identifier (ID)
Parameter Description element, which can be read out by the Description Attribute (20H) sub-index = 1. If
bit 10 is set, a descriptive text exists for each value of the parameter.
As an example, par. 0-01 Language has settings from 0 to 5. For each of these values a specific text
exists: 0 = ENGLISH, 2 = DEUTSCH, etc.
Format
Specifies the format type for each parameter (word, byte, etc.), see below.
How to Access FC 300 Parameters
MG.33.C2.02 - VLT is a registered Danfoss trademark
14
= 0x4000), and the result
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