Display; System - Siemens SICLOCK TC100 Operating Instructions Manual

Plant central clock

Table of Contents

Parameter assignment

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.

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.

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

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.

9-8

SICLOCK

TC100 Operating Instructions

Table of Contents