Siemens SINAMICS S120 Function Manual page 748

Communication
11.1 Communication according to PROFIdrive
Structure of the data cycle
The data cycle comprises the following elements:
● Global control telegram (PROFIBUS only)
● Cyclic part - setpoints and actual values
● Acyclic part - parameters and diagnostic data
● Reserve (PROFIBUS only)
– Token passing (Token Holding Time, TTH)
– For searching for a new node in the drive line-up (GAP)
– Waiting time until start of the next cycle
Figure 11-7 Isochronous drive coupling / motion control with PROFIdrive
748
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Drive functions