CANopen information
3.5.2 Read SDO
Initiate Domain Upload
Request Protocol format:
Byte
Contents Code
The Read SDO telegram has to be send to the slave.
The slave answers with the following telegram:
Response Protocol format:
Byte
Contents Code
Format Byte 0:
MSB
7
0
n = number of data bytes (bytes 4-7) that does not contain data
If only 1 data byte (Data 0) contains data the value of byte 0 is "4FH".
If byte 0 = 80h the transfer has been aborted.
TR-Electronic GmbH 2010, All Rights Reserved
Page 112 of 183
COB-Identifier = 600h + Node-ID
0
1
2
Index
40h
Low
High
COB-Identifier = 580h + Node-ID
0
1
2
Index
4xh
Low
High
6
5
4
3
1
0
0
TR - ELA - BA - DGB - 0016 - 04
Read SDO´s
3
4
Sub-
Data 0 Data 1 Data 2 Data 3
Index
Byte
0
Read SDO´s
3
4
Sub-
Data 0 Data 1 Data 2 Data 3
Index
Byte
Data
LSB
2
1
0
n
1
1
5
6
7
0
0
0
5
6
7
Data
Data
Data
Printed in the Federal Republic of Germany
01/20/2017