Manual

page 97 of 140Prodigy.MC Manual - Version 2.4
CHAPTER 6: RAV.IO
Advanced - PTP Settings
PTP Input Selects one or both network ports used for PTP input. Both
ports means input redundancy. *
IP Mode Multicast = Sync messages and delay request are sent
as multicast message to every node within
the network.
Hybrid = Sync messages are sent as multicast,
delay requests are sent as unicast
messages directly to the Grandmaster or
Boundary Clock.**
Unicast = Sync messages are sent as unicast,
delay requests are sent as unicast
messages directly to the Grandmaster or
Boundary Clock.***
* Using redundant PTP-operation a switch-over is triggered not only at signal
loss of the Grandmaster but depends on the quality of the PTP clock.
Changes (e.g. clock class) are observed permanently and the algorithm
decides for the best signal present.
** Hybrid Mode reduces the workload for all nodes in the network as they do not
receive the (unnecessary) delay requests from other devices anymore.
*** Unicast Mode may help when multicast routing is not possible within the
network. As an opposite to the Hybrid Mode it increases the workload of the
grandmaster since sync messages must be sent to each single slave
individually.