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User Manual
CAN / Modbus TCP Slave
Document code: MN67423_ENG Revision 1.100 Page 23 of 31
S
DO
The Bytes that compose the request are seven:
Byte Number
Description
1
Read Identifier (Read=0x01)
2
Type of Data (SDO=0x02)
3
Address of CANopen device connect to the HD67423
4
Index SDO Hi
5
Index SDO Lo
6
SubIndex SDO
7
Number of byte of frame to read
The Byte that compose the respons is:
Byte Number
Description
1
Ok=0x01 / Parameter Error=0x02 / Error in
sending=0x03
2÷n+1
Data
n=number of byte for the selected frame
Example:
We want to read:
•
Address of CANopen device: 0x14; Type of Data: SDO; Index: 0x2000; SubIndex: 0x01; Number of byte: 4.
So receive the value 0x1A2B3C4D.
The string of hexadecimal numbers is:
REQ:[01][02][14][20][00][01][04]
RES:[01][1A][2B][3C][4D]