Checking Time Synchronization; How To Check The Time Of The Pc Stations - Siemens SIMATIC PCS 7 Function Manual

Checking time synchronization

6.1

How to check the time of the PC stations

Introduction
The following control system message is displayed if time synchronization is disturbed at an
OS, for example:
"LAN-Sync: Time synchronization with PC <xxx> is disturbed".
Requirement
It must be possible to operate the operating system environment.
It must not be possible to execute the w32tm function if command prompts have been disabled
in the process mode (runtime) configuration. If you wish to use this function, you must change
the configuration for process mode.
Methods for checking the time
You can check the time of PC stations in the PCS 7 plant by using the operating system function
"w32tm". Use the "w32tm" operating system function to set the time difference to an additional
computer.
Note
Additional information about the w32tm command is available by entering the string
"w32tm/?" in the Windows "Run" dialog window.
Checking time synchronization using w32/tm
When you enter the command "w32tm/stripchart/computer:<destination>[/
period:<time>]dataonly][/samples:<number>]", you will see a diagram that displays the
deviation (offset) of the computer currently in use to the specified computer.
Command switches
computer:<destination>
period:<time>
dataonly:
samples:<number>
Time synchronization (V8.0)
Function Manual, 03/2012, A5E02779849-02
Meaning
The computer used as the base for the deviation measurement.
Domain controller "DC1" is the target in the example shown below.
Time in seconds between updates. The default value is 2 seconds.
Show only data and no graphics.
Stops sampling after specified number of time samples. If this value
is not specified, time samples will be collected until you press the "Ctrl-
C" key shortcut.
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