6
Commissioning
6.5
Synchronisation with "Distributed clocks" (DC)
40
Lenze · E94AYCET communication module (EtherCAT®) · Communication Manual · DMS 10.2 EN · 11/2018 · TD06
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6.5.4
Process data mode
serves to influence the internal PDO processing time of the actual values.
Deterministic mode (
/
= 1, Lenze setting)
In the deterministic mode, the actual values are copied to the EtherCAT interface with the next
Sync0 event.
= 0)
In the optimised mode, the actual values are not copied to the EtherCAT interface with the next
Sync0 event but already 320
μ
s after the last Sync0 event. Thus, the actual values are provided one
cycle earlier in the EtherCAT interface.
Conditions for the optimised mode:
• The EtherCAT telegram generated by the master has a low jitter and is sent within a window of
320
μ
s after the Sync0 event and shortly before the next Sync0 event.
• The EtherCAT cycle time must be 1 ms.
Note!
• The process data mode is only evaluated with DC synchronisation.
• The setpoints are always processed with the Sync0 event.
• When Lenze EtherCAT controllers are used, we recommend setting the deterministic
mode (
/
= 1).