Technical data

5. During the undefined time, no synchronization frame was received. The
CP therefore attempts to take over the clock master function.
6. The current clock master has received a synchronization frame from a
higher priority CP 5430 TF/CP 5431 FMS. The station once again as-
sumes the status of clock slave.
7. The CP with the clock slave status recognizes an invalid time (e.g.
defective hardware clock).
8. This status change is possible after receiving a valid clock frame from
the clock master from the PG or from the PLC.
9. The CP with the clock master status recognizes an invalid time (e.g.
defective hardware clock).
C8976060/02 Clock Services
13 - 7 Volume 1