Configuring the upper master

This chapter shows how to configure distributed clocks (DC) for the upper master. Connect the previously configured CX8110 to the upper master. Use TwinCAT to scan for the master and the CX8110 connected to it.

Make sure the sync task is less than or equal to 5 ms and the CPU load is less than 60%. The best results are achieved with short cycle times between 1 and 2 ms.

Proceed as follows:

1. In the tree view click on the EtherCAT slave. This is the CX8110 connected to the upper master.
Configuring the upper master 1:

2. Click the DC tab.

3. Under Operation Mode, enable the DC Synchron option.

You have successfully enabled distributed clocks (DC) if the variables DcToTcTimeOffset, DcTimeDiff and Dc State were created under InfoData.