Lenze EtherCAT control technology - Manual (Page 38)

Control technology | EtherCAT communication manual
Synchronisation with "Distributed clocks"
Adjusting task cycle time and DC cycle time
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DMS 3.1 EN 01/2011 TD17
6.2 Adjusting task cycle time and DC cycle time
The industrial PC is the fieldbus master in the EtherCAT network. The clock pulse of the
EtherCAT bus system is determined by the cycle time of the task which is assigned to the
drives (slaves) in the »PLC Designer«.
The task settings in the »PLC Designer« only support integer millisecond cycles and the
smallest possible bus cycle is 1 millisecond. This cycle time can be defined via the task
configuration of the »PLC Designer«.
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Note!
• The DC cycle time to be set in the »EtherCAT Configurator« must comply with
EtherCAT task cycle time set in the »PLC Designer«.
• Select the cycle times, according to the technical data, between 1 and 10 ms.