VLT® 5000 Crane
STX = 02 Start byte
LGE = 0E Length of remaining telegram
ADR = Sends the frequency converter on
Address 1, Danfoss format
PKE = 4001; 4 in the PKE field indicates
a Read Parameter Description and
01 indicates parameter number
001, Language
IND = 0001; 1 indicates that Basic
characteristics are required.
The response from the frequency converter will be:
STX LGE ADR PKE IND PWE
HIGH
PWE
LOW
PCD1 PCD2 BCC
02 0E 01 30 01 00 01 00 00 04 05 XX XX XX XX XX
PKE = 02 Start byte IND = 0001; 1
indicates that Basic characteristics
are sent
PWE
LOW
= 0405; 04 indicates that Basic
behaviour as bit 10 corresponds to
Additional text. 05 is the datatype
which corresponds to Unsigned 8.
No of elements (index 2):
This function indicates the Number of elements
(array) of a parameter. The answer to the
master will be in PWE
LOW
.
Conversion and Unit of measurement (index 4):
The Conversion and unit of measurement command
indicates the conversion of a parameter and the unit
of measurement. The answer to the master will be in
PWE
LOW
. The conversion index will be in the high byte
of PWE
LOW
and the unit index will be in the low byte
of PWE
LOW
. Note that conversion index is signed 8
and unit index is unsigned 8, see tables below.
The unit index defines the "Unit of measure". The
conversion index defines how the value should
be scaled to get the basic representation of the
"Unit of measure". Basic representation is where
conversion index equals "0".
Example:
A parameter has a "unit index" of 9 and a "conversion
index" of 2. The raw (integer) value read is 23. This
means that we have a parameter of the unit "Power"
and the raw value should be multiplied by 10 to the
power of 2 and the unit is W. 23 x 10
2
= 2300 W
MG.50.N4.02 - VLT is a registered Danfoss trademark
106
To Next Page
Loading...
