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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«

 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").

 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.

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Lenze EtherCAT control technology Manual do Utilizador Página 39