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3. EtherCAT Communication
3.4
Synchronization
Synchronization modes provided from controller are as below.
Figure 3.6: Type of EtherCAT Synchronization and Differences
3.4.1
Free Run
Controller runs under non-synchronization with Master. Under Free Run mode, Master and Controller
has an individual independent Cycle.
3.4.2
SM Event
Controller runs under synchronization with SM Event of EtherCAT communication. SM Event is gener-
ated once controller receives EtherCAT Frame.
Once synchronization by SM Event, each one of controller has few us range of jitter.
3.4.3
DC Sync Event
Synchronized controller runs under Sync Interrupt is generated according to Distributed Clock (following
DC).
DC is synchronized time shared between Master and Slave. With synchronized clock, interrupt is gen-
erated under accurate synchronization and controller executes commands under accurate timing.
In this case, each one of controller has few us range of jitter.
Rev.37
FASTECH Co., Ltd.
29
Summary of Contents for Ezi-STEPII EtherCAT MINI
Page 10: ...Chapter 1 Product Specification Rev 37 FASTECH Co Ltd 10 ...
Page 14: ...Chapter 2 Installation Rev 37 FASTECH Co Ltd 14 ...
Page 25: ...Chapter 3 EtherCAT Communication Rev 37 FASTECH Co Ltd 25 ...
Page 31: ...Chapter 4 CiA402 Drive Profile Rev 37 FASTECH Co Ltd 31 ...
Page 55: ...Chapter 5 Operation Rev 37 FASTECH Co Ltd 55 ...
Page 59: ...Chapter 6 EtherCAT Object Dictionary Rev 37 FASTECH Co Ltd 59 ...