Parameter assignment

Daylight saving

The device makes the daylight saving change automatically at the parameterized switching times.

Parameter /Time/Extended/Daylight Saving (0.09.07)

Note

The preset switching times are consistent with the regulations currently valid in the European Union.

The setting "Change = No" suppresses the time change, and the plant is operated with standard time.

The calendar rule for the daylight saving time change can be defined worldwide via a parameter.

Leap seconds

You define the leap-second calendar with the parameter /Time/Extended/Leap Seconds[20] (0.09.05).

9.3.2Synchronization

Synchronizaion status

You can readout the various information about the current synchronization status via the parameter /Synchronization/Synchronization Status (0.09.09).

Protected synchronization

If a discontinuity of longer than 5 seconds occurs in the external synchronization, the protected synchronization is activated. The synchronization is disabled, and an alarm is triggered, which is pending as long as the discontinuity in the external synchronization continues.

The pending synchronization disable can be ignored once and the "Protected Synchronization" alarm cleared with the parameter entry /Synchronization/Exten- ded/Protected Synchronization/Ignore/Clear Alarm (0.09.12) = "Yes".

Note

This synchronizes unconditionally with the external time, and a time jump can occur in the plant operation.

If required, disconnect the active external synchronization in advance or delete the server address for NTP client operation from the parameter

/NTP Client/NTP Server List[4] (0.18.02).

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SICLOCK® TC100 Operating Instructions

 

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Siemens TC100 manual Synchronization, Daylight saving, Leap seconds, Synchronizaion status, Protected synchronization

TC100 specifications

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