Lust CM-CAN1 - Representation of parameter data; Data types

4-2
User Manual CM-CAN1
4 Setting the device parameters
4.1 Representation
of parameter
data
The parameters are set by way of the parameter channel described in
section 4.6 “Parameter channel”.
The parameter data are transmitted in binary format within a CAN data
block. The parameter data begin at data byte 3 and have a maximum
length of 4 bytes (Intel format).
Interpretation of the data transferred in the data block differs depending
on parameter data type.
Note: For most device parameters the settings are displayed in the
K
EYPAD and the DRIVEMANAGER user interface in the form of
value substitution texts (abbreviations). In response to que-
ries and for transfers over the bus system the settings are
transferred in the form of numerical values. The following
descriptions of the settings give both: (numerical value) value
substitution text.
4.1.1 Data types
The drive units support the following parameter data formats:
Priority
based on
CAL
Base
ID
Data byte
0
Data byte
1
Data byte
2
Data byte
3+4+5+6
Data byte
7
5 1101 PARA_LO PARA_HI
Mode of transfer:
See Table 4.1
DATA
Counter or index for
field parameters
Data type Value range Function
USIGN8 0 ... 255
unsignedUSIGN16 0 ... 65535
USIGN32 0 ... 4294967295
INT8 -128 ... 127
Whole number, signed
INT16 -32768 ... 32767
INT32
-2147483648 ...
2147483647
INT32Q16 -32767.99 ... 32766.99
32-bit number with scaling 1/65536, i.e. the
Low word indicates the number of decimal
places
FIXPOINT16 0.00 ... 3276.80
Fixed point number with scaling 1/20,
i.e. increment size 0.05
Table 4.1 Data types