Lenze DDS System bus CAN for PLC Manuel d'utilisateur Page 26

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System bus (CAN) for Lenze PLC devices
General information
2−14
l
PLC−Systembus EN 2.0
2.7.1.4 Data of the parameter (data 1 ... data 4)
Identifier
Command
code
Index
Subindex Data 1 Data 2 Data 3 Data 4
Low byte High byte
For the data of the parameter up to 4 bytes (data 1 ... data 4) are provided.
· The data are presented in the left−justified Intel format with data 1 as LSB and data 4 as MSB
(see example).
Example:
For a code in the "Fixed32" data format, the value "20" is to be transmitted.
· "Fixed32" is a fixed point format with 4 decimal positions. Therefore the value has to be
multiplied by 10000:
Data
1...4
+ 20 @ 10000 + 200000 + 00 03 0D 40
hex
11bit 8 bytes user data
Identifier
Command
code
Index
Subindex Data 1 Data 2 Data 3 Data 4
Low byte High byte
40
hex
0D
hex
03
hex
00
hex
(LSB) (MSB)
Tip!
The parameters of the Lenze devices are stored in different formats.
Detailed information on this subject can be found in the Manual for the respective PLC in the chapter
"Appendix − Table of attributes".
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