Siemens SICLOCK TC 400 - Manual (Page 87)

Parameterization
9-85 © Siemens AG 2007 All Rights Reserved
SICLOCK
® TC 400
Microstepping
If during operation a difference occurs between the input synchronization (e.g.
radio clock) and the device up to a tolerance of some seconds, that difference will
not be set immediately, since that would cause an inconsistency in the time dis-
tribution.
This difference is corrected with microstepping which is significantly below the
time resolution of typical pants and therefore remains unnoticed in the plant oper-
ation. This may take up to several hours.
The correction of the time difference with microstepping can be interrupted once
with the parameter entry /Synchronization/Advanced/Microstepping/ignore/can-
cel (0.09.13) = "yes".
This initiates an immediate synchronization to the external time resulting in an
inconsistency in the time distribution to the plant.
Monitoring
The /Synchronization/Advanced/Monitoring (0.09.14) parameter specifies
whether the device should output an alarm or a warning when there is no external
synchronization.
9.3.3 Display
You can change the language and the display of the time with the /Display/View
(0.10.01) parameter. The time can be displayed as UTC, local time or TAI.
9.3.4 System
You can specify or change the password for the standard protection with the /Sys-
tem/Authorization For Standard Protection (2.06.02) parameter.
You can reset the parameters to the factory settings with the /System/Reset
(0.06.04) parameter. Exceptions are parameters such as network addresses,
authorizations, etc.
Note
Avoid inconsistencies in the time distribution to the plant.
The Ignore microstepping command is suitable, for example, for the first input
synchronization during the commissioning.