STOBER
9 | Looking for more information about EtherCAT?
02/2020 | ID 443025.06
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9.5.2.1
AS6: Synchronization using DC-Sync
The event for one synchronization is referred to as the Sync 0 signal in STOBER AutomationControlSuite. Each slave generates it own Sync 0 signal cyclically using the respective
SyncManager.
9.5.2.1.1
DC settings
The following graphic shows stable synchronization using distributed clocks when using AutomationControlSuite. Both the utilization of the controller as well as the set times show a stable
system, since the frame jitter (controller) and the application jitter (drive controller) are separated from each other.
O
I
1
3
2
I
O
O
I
1
3
2
I
O
O
I
1
2
STOBER MC6
Frame
Sync Offset
Shift Time
Data ready
Sync 0
PLL phase offset
AR1
Cycle time
Cycle time
Cycle time
NC+PLC
NC+PLC
NC+PLC
APP
APP
= Jitter
Fig. 14: AS6: DC-Sync – Settings
In the example, the data transmission (I/O) of the controller is set to task begin in the EtherCAT configuration. For the application cycle sequence, the order is defined as RxPDO, graphical
programming, TxPDO (A149 = 0).