Manual VIPA System 300V Chapter 6 Deployment CPU 31x with TCP/IP
HB130E - CPU - Rev. 11/50 6-31
Activate clock master
Every CP is able to work as master if parameterized accordingly.
Note!
At mixed deployment with Siemens CPs you have to make sure to use
the MMS time format because this is the only one supported by Siemens.
Clock master When the superordinated master (Clock transmitter) fails, the CP
parameterized here can get a dynamic master. For this, the CP has to be
highest priority and you have to use it as clock master.
For clock master mode you have to enter the destination address
(Broadcast or Multicast) and at Multicast the destination Ethernet
address. Time format and cycle time must be conform.
As slave, only time format and cycle time must be conform.
Destination address Broadcast
When choosing broadcast, the address is set to FFFFFFFFFFFFh. It is
not changeable.
The clock telegrams are sent to all bus participants.
Multicast
The clock telegrams are only sent to the bus participants that are
members of the multicast circle given by the address.
Address At the setting Broadcast this address is at FFFFFFFFFFFFh. At Multicast
you type the address for the multicast circle.
Register Clock-Init
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