CANopen communication
Parameter data transfer (SDO transfer)
Telegram structure
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KHB 13.0003-EN 2.0
5.2
Parameter data transfer (SDO transfer)
5.2.1
Telegram structure
The telegram for parameter data has the following structure:
11 bits
4 bits
User data
(up to 8 bytes)
1st byte
2nd byte 3rd byte 4th byte 5th byte 6th byte 7th byte 8th byte
Identifier
Data
length
Command
code
Index
low byte
Index
high byte
Subindex
Data 1
Data 2
Data 3
Data 4
Error code
ƒ
The following subchapters explain in detail the different parts of the telegram.
Identifier
11 bits
4 bits
User data
(up to 8 bytes)
Identifier
Data
length
Command
code
Index
low byte
Index
high byte
Subindex
Data 1
Data 2
Data 3
Data 4
With the exception of the network management and the sync telegram, the identifier
contains the node address of the drive:
Identifier (COB ID) = basic iden adjustable node address (node ID)
The identifier assignment is specified in the CANopen protocol.
The ex works default setting of the basic identifier is:
Object
Direction
Basic identifier
From the drive
To the drive
Hex
SDO (parameter data channel)
X
580
X
600