Issue 01/05  Data transfer using CANopen 
CANopen Option Module    Operating Instructions 
6SE6400-5BC00-0BP0 
49 
3.2.6 Synchronization service 
A SYNC producer sends the synchronization object cyclically as broadcast 
telegram. The SYNC telegram defines the basic clock cycle of the network. The 
time between the SYNC telegrams is set using the object Communication Cycle 
Period (1006H). In order to obtain a precise (accurate) cycle between the SYNC 
signals, the SYNC telegram is sent with a high-priority identifier (generally 80H). 
This can be modified using the object 1005H. The SYNC transfer applies the 
Producer/Consumer Push model and is non-confirmed. 
Request
SYNC Producer
Indication
SYNC Consumer
L = 0
Write SYNC
 
Fig. 3-14  Synchronization service