Rockwell Automation 2094-EN02D-M01-Sx Kinetix 6200 and Kinetix 6500 Modular Multi-axis Servo Drives User Manual - Manual (Page 172)

172 Rockwell Automation Publication 2094-UM002E-EN-P - May 2012
Chapter 7 Configure and Start the Kinetix 6500 Drive System
The Controller Properties dialog box opens.
6. Click the Date/Time tab.
7. Check Enable Time Synchronization.
This assigns the controller as the Grandmaster clock. The motion modules
set their clocks to the module you assign as the Grandmaster.
8. Click OK.
IMPORTANT You can assign only one module in the Logix chassis as the
Grandmaster clock.