CanOpen protocol
Positioning module IMD20, IMD40
CAN address
e.g.
+ SDO
o. PDO adr.
17
Error
recognition
CAN package
Any data (max. 8 bytes)
SDO
Index
Sub-
index
Flags
r/w...
Data (max. 4 bytes)
e.g. target position
(607A object, 32 bit)
PDO
Data (max. 8 bytes)
CANOpen
Object X
(16 Bit)
Object Y
(8 bit)
Control level
Parameters and data of the control
CAN
CANOpen control
e.g. PC
CANOpen participant
e.g. I/O module
CANOpen participant
e.g. Drive,
node adress
17
Or
SDO
Index
Sub-
index
Flags
r/w...
Data (max. 4 bytes)
Index 607A
Sub-index 0
Variable for
target position
Object
Dictionary
PDO
e.g. target position
(607A object, 32 bit)
PDO mapping
Table
Object X
Target position
Ob-
Ject
Read
or w
rite
Re
ad
o
r w
rit
e
CAN line
..........
Principle of the data transfer in the CANOpen
network via SDOs and PDOs
80