Lust CM-CAN1 - Mapping data types

User Manual CM-CAN1
4-3
4 Setting the device parameters
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4.1.2 Mapping data
types
All data types are represented appropriate to their preceding sign as
32-bit variables in Intel format.
FLOAT32 see IEEE 32-bit floating point number in IEEE format
ERR_STRUC –
Error number (1 byte), error location (1 byte),
error time (2 bytes)
STRING –
ASCII characters, max. 100 bytes in bus
operation incl. zero terminator
Table 4.1 Data types
Bytes 3 4 5 6
USIGN8/INT8 *
USIGN16/INT16 *
USIGN32/INT32
Low Word Low
Byte
Low Word High
Byte
High Word Low
Byte
High Word High
Byte
INT32Q16
Post-point L Post-point H Pre-point L Pre-point H
FIXPOINT16 *
See examples, Table 4.3
FLOAT32
IEEE format
ERR_STRUC
Error no. Error location TOP L TOP H
STRING See examples, Table 4.3
* Filled out appropriate to preceding sign (00H or FFH)
TOP = Time of OPeration in full hours
Table 4.2 Arrangement of data types in the data field
L Low Byte
H High Byte