BECKHOFF EtherCAT Technology Section I - Manual (Page 78)

Distributed Clocks
I-58 Slave Controller – Technology
9.1.6 Reference between DC Registers/Functions and Clocks
Table 30: Reference between DC Registers/Functions and Clocks
Register Address Name Referring to clock
0x0900:0x090F Receive Time Port n Local Time (t
Local time
)
0x0918:0x091F Receive Time ECAT
Processing Unit Local Time (t
Local time
)
0x0910:0x0917 System Time ECAT:
Local copy of System Time when frame
passed Reference Clock
(t
Local time
+ t
Offset
– t
Propagation delay
)
PDI:
Local copy of System Time (t
Local time
+ t
Offset
)
0x0990:0y0997 SYNC0 Start Time Local copy of System Time (t
Local time
+ t
Offset
)
0x0998:0x099F NEXT SYNC1 Pulse Local copy of System Time (t
Local time
+ t
Offset
)
0x09B0:0x09B7 Latch0 Time Positive Edge Local copy of System Time (t
Local time
+ t
Offset
)
0x09B8:0x09BF Latch0 Time Negative Edge Local copy of System Time (t
Local time
+ t
Offset
)
0x09C0:0x09C7 Latch1 Time Positive Edge Local copy of System Time (t
Local time
+ t
Offset
)
0x09C8:0x09CF Latch1 Time Negative Edge Local copy of System Time (t
Local time
+ t
Offset
)
0x09F0:0x09F3
EtherCAT Buffer Change
Event Time Local Time (t
Local time
)
0x09F8:0x09FB PDI Buffer Start Event Time Local Time (t
Local time
)
0x09FC:0x09FF
PDI Buffer Change Event
Time Local Time (t
Local time
)