Time Synchronization - Siemens PCS 7 Installation Manual

Example for WLAN in PCS 7
The following figure show a basic configuration of WLAN components in a PCS 7 plant.
Additional information
You can find detailed information on WLAN components, installation guidelines and settings
in the following documentation:
● Product Information
● Operating instructions of SIMATIC NET released WLAN components (see Product
overview
● System manual
3.9.4

Time synchronization

System-wide Time Synchronization
To obtain process data that can be evaluated, all the components of the process control system
need to work with an identical, synchronized time of day. This allows you to assign messages
in the correct sequence over time. The result is then consistent regardless of the time zone in
which the messages originate.
One system component must be the clock for all other components so that all process control
system components work with an identical time. The PCS 7 component that functions as timer
is referred to as the time master. Components such as the central plant clock SICLOCK or an
OS server can be configured as the time master.
PCS 7 - PC Configuration (V8.2)
Installation Manual, 03/2016, A5E36200050-AB
Process Control System PCS 7; PCS 7 Released Modules
Process Control System PCS 7; PCS 7 Released Modules )
SIMATIC NET; Basics - Industrial Wireless LAN
PC components of a PCS 7 system
3.9 Connecting PC stations
45