Siemens Plant Central Clock TC100 - Manual (Page 120)

Glossary
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SICLOCK ® TC100 Operating Instructions
UTC
UTC stands for universal time coordinated. It is a combination of the international
atomic time TAI and the universal time UT. The time zones are defined as positive
or negative differences from UTC.
Volatile parameter
Volatile parameters are parameters containing values or states that change con-
tinually during operation.
Zone time
The zone time is the zone time derived from UTC.