Datalogic AMT58 Series Manual page 145

AMT58x-EC EtherCAT®
Synchronous with SM3
In this mode data is sampled and then copied into Sync Manager
buffer as soon as previous data was read from the Master (SM
event); in this way new sampled data is synchronous with Master
readings.
SM3 Event
Frame N
0x1C33:03 (Shift Time)
New data will be read by the Master at next cycle (following SM3
event), so if cycle time is too long, data could be relatively old for a
real-time system.
The main advantage is that data is updated exactly when Master is
reading (synchronous mode).
Description
Jitter
Cycle Time 62,5
36
0x1C33:02 (Cycle Time)
0x1C33:06
(Calc & Copy)
Jitter
Input Latch
Min Typ
0
64000
SM3 Event
Frame N+1
Max
7,2 µsec
µsec