Technical data

Configuring time synchronization
5.9 Configuring time synchronization for the SIMATIC PCS 7 BOX and SIMATIC PCS 7 AS RTX
Time synchronization (V7.1)
110 Function Manual, 03/2009, A5E01216578-01
Plant-specific assignment of time synchronization parameters for the SIMATIC PCS 7 BOX and
SIMATIC PCS 7 AS RTX
In PCS 7, time synchronization of the SIMATIC PCS 7 BOX/SIMATIC PCS 7 AS RTX is
dependent on the plant configuration. The following table shows the settings required for
time synchronization.
PCS 7 network
Synchronization via plant
bus (external)
Single station system
Synchronization via BIOS time (local)
Settings to be made in
following environment
The displayed time
should match the
synchronization source
specifications.
The displayed time should
match the local time. Possible
to switch between daylight
saving time/standard time.
A continuous time should be
set on the AS (GMT/UTC).
The time should be displayed
uniformly across all levels and
functions.
Note:
Daylight saving and standard time
must be set manually. Please
contact Customer Support
regarding automatic switchover.
Source: CP Source: PC Source: PC WinAC time
synchronization Settings
(Page
111):
Time base: GMT Time base: Local
Time zone: Local time
zone
Time zone: Local time zone Time zone: Greenwich Mean
Time (GMT)
Windows setting
Date and time properties
> "Time Zone" tab
Settings (Page 54):
Select switchover between daylight saving and standard
time on a plant-specific basis
"Automatically adjust clock for
daylight saving changes" check
box deactivated
Option button "The PLC is set to coordinated universal
time (UTC) (preferred setting)": Activated
Option button "PLC is set to the
local winter time all year":
Activated
WinCC Explorer
"Computer" object
properties > "Parameters"
tab (Page
113)
"Time base for time display in runtime" group: Local time zone
WinCC Explorer "Time
Synchronization" editor
You will find additional information on plant-configuration-dependent settings under
"Configuring the time synchronization of the OS (Page 71)"; Sections:"Configuring the OS
client for time synchronization"