Bus cycle
A bus cycle consists of the following phases:
- Start of Cycle Frame – In the first phase, all stations (CNs) are synchronized.
- Isochronous Phase – In this phase, data is transferred cyclically between the master (MN) and the CNs.
- Asynchronous Phase – In this phase, non-time-critical data such as Service Data Objects (SDOs), device configuration parameters, diagnostic data, application data, recordings, and web browser applications can be transferred.
The following figure shows an individual bus cycle:

