Distributed Clock

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Distributed clock settings are used to synchronize all devices on the network to a unified system time.

  1. Enables the DC clock for the device.

  2. If an ESI file is applied, the Select from preset dropdown displays the available options. Select one of the available DC clock settings.

  3. Enter the hex value of the preferred Assign Activate. Using Select from preset automatically applies the correct Assign Activate value based on the chosen preset.

  4. For Mode, you can select either Cycle or User Defined.

  5. Based on the selected Mode:

    • For Cycle, you need to define a Factor for Cycle Time Sync/Shift 0. If the factor is positive: Fieldbus Task Cycle Time * Factor. If the factor is negative: Fieldbus Task Cycle Time / Factor. For Cycle Time Shift 0, the default factor of -2 can be used.
    • For User Defined, you need to specify the Cycle Time Sync/Shift 0 value in nanoseconds [ns]. For example, if the field bus task is configured to 1 kHz:
      • cycle_time_sync0 [ns] = field bus task cycle time [ns] = 1,000,000 ns
      • cycle_time_shift0 [ns] = 50% of the field bus task cycle time [ns] = 500,000 ns