Lenze EtherCAT control technology - Manual (Page 39)

DMS 3.1 EN 01/2011 TD17
L
39
Control technology | EtherCAT communication manual
Synchronisation with "Distributed clocks"
Setting the DC synchronisation with the »EtherCAT Configurator«
6.3 Setting the DC synchronisation with the »EtherCAT Configurator«
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How to set the DC synchronisation:
1. Set the Distributed clocks (DC) cycle time at the EtherCAT Master:
• The DC cycle time to be set in the »EtherCAT Configurator« must comply with
the EtherCAT task cycle time set in the »PLC Designer«.
• Select the cycle times, according to the technical data, between 1 and 10 ms.
• The (basic) cycle time set here is valid for all Logic and Motion nodes
synchronised by distributed clocks.
• For field devices with communication modules (e.g. Servo Drives 9400 or
Inverter Drives 8400), a synchronisation source must be selected via code
C01120. If the DC setting and the selection of the sync source differ from each
other (C01120 = MXI1 and "DC nused"), the devices cannot be set to the
Operational state.
• For Servo Drives 9400, code C13892/C14892 = 1 must be set (process data
mode = "deterministic mode").
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Note!
The manual configuration of the slave DC features requires a detailed
knowledge of EtherCAT and the field device. Thus, DC settings should only be
made by experts.
A faulty configuration can cause maloperation and negative influences on the
system.