Siemens Plant Central Clock TC100 - Manual (Page 116)

D-11 © Siemens AG 2010 All Rights Reserved
SICLOCK ® TC100 Operating Instructions
Glossary
D
Alarm
Alarms are events with incoming and outgoing status.
See Device.
Archive
The archive contains relevant events with additional information from the device.
The archive can be searched for specific events with the aid of a filter.
See Filters.
Atomic time (TAI)
The atomic time is defined as a time domain in the standards of some protocols
(PTP, PTCP). A leap-second calendar is required to calculate the atomic time.
Authorization
In order to change parameter entries in the device with the Configuration Tool, the
user must authorize himself appropriately in the Configuration Tool with a pass-
word. There are a number of authorization levels.
The current authorization status is shown in the password entry field, red indica-
tes the lowest authorization level.
See Password.
Central plant clock
The central plant clock is the central component for the time synchronization of
plants. It synchronizes all time-of-day components in a plant via its interfaces.
Device
The SICLOCK TC100 central plant clock is referred to as the device.
Entry
An entry contains a value or a selection (combobox). Depending on the type of
entry, the value / selection can be changed by the user.
Related entries are grouped in one parameter.
See Parameter.