Time-Of-Day Synchronization - Siemens CP 443-5 Extended Manual

5 Performance Data
5.6

Time-of-day Synchronization

The CP 443-5 forwards time-of-day synchronization frames in the following
directions:
1. From the CPU via the CP to PROFIBUS if the local CPU is the time master or
this station is synchronized via a different LAN and the time-of-day
synchronization frame is forwarded via PROFIBUS for the synchronization of
further stations.
2. From PROFIBUS over the CP to the CPU if a remote station is time master, for
example:
- a remote CPU 41x with PROFIBUS interface (for example, CP 443-5)
- a remote PC with CP 5412 / 5613 / 5614
Note
With transmission rates of < 1.5 Mbps, we recommend that you configure a
synchronization interval of at least 10 s.
B4-22
CP 443-5 Extended for PROFIBUS / Manual Part B4
C79000-G8976-C162-06
Release 6/2005