CanOpen protocol
Positioning module IMD20, IMD40
Objekt X
Byte 1
Objekt X
Byte 0
Object2
Byte 0
0x300 +
Node ID
PDO Producer
Data
Object1
Byte 1
Operation
1
2
3
0x 6040 00 10 Object1
.....
Index
Sub-
index
Length
In bit
e setting of the mapping:
The setting of the mapping is carried out via SDO.
e
dex 0 in
s th
ber of a
in the PDO.
he mapping entries can be described as of sub-index 1.
At the end, the corresponding number of objects is once again entered in the sub-index 0. If an object
cannot be mapped or if the length of the PDO is exceeded, the SDO transfer is interrupted with a
sponding error message.
Os can be tri
by thre
n
r an internal timer.
•
by the query of the PDO via a remote request (RTR Can object).
•
by the
of a SYNC message.
urthermore, two types of transfer are distinguished:
•
synchronous transfer. Synchronous PDOs are transferred directly after the SYNC object.
•
asynchronous transfer. Asynchronous PDOs can be transferred at any given point in time.
Before the mapping can be changed, sub-index 0
be set to 0 in order to deactivate the
by an internal event (e.g. chang
SYNC
SYNC
SYNC
SYNC
SYNC
Time
Synchronous
Asynchronous
84