Siemens Plant Central Clock TC100 - Manual (Page 83)

Parameter assignment
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SICLOCK ® TC100 Operating Instructions
Microsteps
If a difference occurs between the input synchronization (e.g. radio clock) and the
device up to a tolerance threshold of several seconds, this difference is not adjus-
ted immediately as this would lead to a time jump in the time synchronization.
This difference is run down incrementally in microsteps, which are significantly
below the time resolution of typical plants, and so remain unnoticed by the plant
operation. This process may take up to several hours.
The run down of the time difference in microstep mode can be interrupted once
with the parameter entry /Synchronization/Extended/Microsteps/Ignore/Cancel
(0.09.13) = "Yes".
This causes immediate synchronization with the external time, and a time jump
occurs in the plant operation.
Monitoring
You define whether the device outputs an alarm or a warning in the absence of
external synchronization with the parameter
/Synchronization/Extended/Monitoring (0.09.14).
9.3.3 Display
You change the language and the representation of the time with the parameter
/Display/Representation (0.10.01). The time can be shown as UTC, local time or
TAI.
9.3.4 System
You define and can change the password for standard protection with the para-
meter /System/Authorization For Standard Protection (2.06.02).
You use the parameter /System/Reset (0.06.04) to reset the parameters to the
factory defaults. This does not reset parameters such as network addresses,
authorizations etc.
Note
Avoid time jumps in the plant operation.
The "Ignore microstep mode" command is suitable, e.g. for the first input synchro-
nization during commissioning.