Siemens Plant Central Clock TC100 - Manual (Page 18)

Description
2-1  © Siemens AG 2010 All Rights Reserved
SICLOCK ® TC100 Operating Instructions
2.4 Time management
The SICLOCK TC100 has a range of functions for generating the valid plant time
from the external synchronization. This includes the option of setting times zones
and the parameterizable generation of daylight saving.
Time security through protected synchronization
If a discontinuity of longer than five seconds occurs in the external synchroniza-
tion, the protected synchronization is activated, and the synchronization is not
executed for safety reasons.
Time security through microstep mode
A time difference between the external synchronization and the device, such as
can occur as the result of a brief loss of loss of radio contact or switching to a sub-
stitute synchronization, is run down automatically in microstep mode that is imper-
ceptible to the operation of the plant. No time jump occurs.
More detailed information and the options for parameter assignment for protected
synchronization and microstep mode are described in the chapter
Synchronization (Chapter 9.3.2).
2.5 Commissioning
Commissioning can be subdivided into the following steps:
1. Mounting (Chapter 5)
2. Connection (Chapter 6)
3. Assignment of an IP address to the device
Parameter assignment and operation of the device (Chapter 8)
4. Parameter assignment (Chapter 9)
With few exceptions, the settings are made with the Configuration Tool, see
Configuration Tool (Chapter 7).
Note
Parameterize the plant time at one single point within the synchronization hierar-
chy, ideally on the central plant clock.