Parameters And Data Type Structures - Danfoss 5000 Flux Manual

Parameters and data type structures

Parameter description
Parameters which are accessible through the pa-
rameter number (PNU) have additional attributes
that are a component of the accompanying de-
scriptive element.
Writing/reading of a parameter description occurs
through the PCV portion by means of the RC
commands 4/5 and the subindex of the desired
descriptive element (see accompanying diagram).
PNU
Characteristics
The "characteristics" subindex extends the defini-
tion of the parameter description. The individual
bits 9 to 15 have the values TRUE [1] or FALSE [0]
(see table below).
Bit Meaning
15 Active parameter
14 Array
13 Parameter value resettable only
12 Factory setting of parameter changed
11 Text available
10 Additional text array available
9 No write access (read only)
8 Lower and upper limit. Standardiza-
tion and size attribute not relevant.
0-7 Data type of the parameter corre-
sponds to OD
The low byte (bit 0-7) indicates the data type of
the parameter (see following table).
The "data type" for each parameter can be
found in the corresponding column in the
chapter parameter listing.
14
VLT ® 5000/5000 Flux/6000 HVAC/8000 AQUA PROFIBUS
Caracteristics
"Sub index" 1
Element size
"Sub index" 2
Size attribute
"Sub index" 4
Lower limit
"Sub index" 7
Upper limit
"Sub index" 8
Extended features
"Sub index" 10
Data types supported by VLT
Data Object Short
type form
3 5 12
4 5 12
5 5
6 5 O2
7 5 O4
9 5
10 5
13 5
33 5 N2
35 5 V2
1) See following page for details
Example: Data type 5 = Unsigned 8
Size attribute
The size attribute is 2 bytes long.
Byte 1 incorporates the physical unit of measure-
ment (size index), byte 2 the conversion index.
The "conversion index" for each parameter
can be found in the corresponding column
in the chapter parameter listing.
The "conversion index" produces the conversion
factor for each parameter.
Example:
Parameter 205: Conversion index = -3 <=> (10E-3)
Conversion factor: 0.001
15200 = 15.200 Hz
An excerpt from the PROFIDRIVE profile with
respect to the assignment of the size index and
the conversion index to the physical size can be
found on the following page.
MG.90.D1.02 – VLT is a registered Danfoss trademark
Description
Integer 16
Integer 32
Unsigned 8
Unsigned 16
Unsigned 32
Visible string
Byte string
Time difference 1)
Standardized value
(16 bit) 1)
Bit sequence