Lenze EtherCAT Controller-based Automation - Manual (Page 104)

7 Commissioning of the system
7.3 Detailed description of the commissioning steps
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Lenze · Controller-based Automation · EtherCAT® Communication Manual · DMS 6.4 EN · 04/2014 · TD17
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7.3.19 Optimising the task utilisation
Optimise the task utilisation to obtain a lower jitter of the process data frames.
For this, you can enter the following settings on the Settings tab of the EtherCAT master:
Pos. Setting
Instant of transmission for the EtherCAT bus cycle frame
: The EtherCAT frame is sent at the beginning of the bus cycle task.
: The EtherCAT frame is sent at the beginning of the bus cycle task.
Activation of "Master shift"
The input field is only active if the checkbox "Send at task start" is set.
: "Master shift" active
: No "Master shift"
"Master shift time" in μs
Time by which the PLC system clock is placed before the SYNC0 event.
Since the PLC system clock is 1 ms, only a value of 0 ... 1000 μs will be useful.
The input field is only active if the checkbox "Enable master shift" is set.

Note!
For projects up to and including release 3.5 and for updates to release 3.6, in the
EtherCAT master, the
"Send at task start" option is not set. The EtherCAT frame is
sent at the end of the bus cycle task.
For new projects of release 3.6, the "Send at task start" option is set in the EtherCAT
master.