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INOVANCE TECHNOLGY EUROPE GmbH
SV660N Startup Procedure_EN_v1.4_20220826.docx
6.8.2 SYNC AND IRQ PHASE POSITION (µS) [49]
SV660N uses the Distributed Clock mode to maintain an exact synchronization with the master.
[Source EtherCAT.org]
The method of Distributed Clocks provides highly precise time synchronization between slaves in an
EtherCAT network. Since DC refers to the ESC-internal clocks, synchronization time between slaves can
be guaranteed to much better than 1μs. The requirement of DC depends on the necessity of
synchronization precision of the developing slave device. For instance, in machines in which multiple
servo drives are functionally coupled, the axes need to be precisely synchronized to perform coherent
movement. For this reason, many slaves for servo drive adopt DC in order to achieve high
synchronization precision with other slaves. Thus the DC functionality should be implemented in cases
of servo drive systems or I/O slaves being synchronized with servo drives.
Using the trigger tool it is possible to see the synchronization between master and slave. The value of [49]
“SYNC and IRQ phase position” shows the offset between slave microprocessor interrupt and SYNC signal
interruption.
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