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Industrial Ethernet S7-300/400 CPs -- Setting up and parameterizing hardware -- Synchronizing time
How do you configure the SIMATIC S7-300 as time master or time slave for time-of-day synchronization via Industrial Ethernet in SIMATIC mode?
How do you configure time synchronization?
Where can you find information on the Siclock system?
Which SIMATIC S7-300/S7-400 modules support the NTP time-of-day message and how do you activate this kind of time synchronization?
How can you calculate the actual local time (summer time or winter time) in the S7-300/400 CPU and then use it on the panel as system time?
How do you configure the SIMATIC S7-400 as time master or time slave for time-of-day synchronization via Industrial Ethernet in SIMATIC mode?
How do you configure a PC as NTP server?
Why can't you use the IEEE Standard 1588 for synchronizing SIMATIC controllers?
How do you configure a PC as NTP server?
Part number:

Description:
The Network Time Protocol (NTP) is a standard for synchronizing computer system clocks via package-based communication networks. Although this is usually done via UDP, it can also be transported by other Layer 4 protocols such as TCP, for example. It was specially developed to enable reliable time relaying via networks with variable package runtimes.

The Simple Network Time Protocol (SNTP) is a simplified version of NTP. It is described in RFC 2030.

Instructions:
Follow the instructions to configure your local computer as NTP server. In this way you can synchronize other devices with the local PC.
 
No. Procedure
1 Open the registry editor via "Start -> Run... -> regedit".
2 Search for the code "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters".
3 Edit the "LocalNTP" value and set it to 1.


Fig. 01

Note:

  • If the "LocalNTP" value does not exist in your system, create a new DWORD value.
  • 0 means deactivated, 1 means activated.
4 Restart the computer to make the changes effective.

Note
The instructions below are for configuring the Windows time service for using an internal hardware clock and an external time source.
 
Windows operating system Instructions
Windows 2000 http://support.microsoft.com/kb/216734
Windows XP http://support.microsoft.com/kb/314054
Windows 2003 Server http://support.microsoft.com/kb/816042

Warning:
Changes in the Registry can lead to unexpected problems requiring you to reinstall your system. We cannot guarantee that problems arising from changes in the registry can be solved. Changes in the Registry are entirely at the user's own risk.

 Entry ID:22144502   Date:2010-04-15 
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