hopf 4985LAN, Technical Manual, Page: 49 / 84

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4985LAN Large Matrix Display 4985 - V08.00 49 / 84
hopf
Elektronik GmbH
Nottebohmstr. 41
• D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: info@hopf.com
5.3.4.4.2 NTP Servers for Synchronisation
Server Identifier
In this field the NTP Server, used for the synchronisation of Module 8029NTC, should be
registered. Adding further NTP servers provides the option to implement a safety system for
the time service. However, this influences the accuracy and stability of the module.
Detailed information on this subject can be found in the NTP documentation
(
http://www.ntp.org/ ).
Authentication / Key ID
Broadcast packets can be protected by authentication for security reasons.
If a security method is selected here this must be configured ADDITIONALLY in the security
settings of the NTP tab. A key must be defined if the "Symmetric Key" is selected.
5.3.4.5 Extended Configuration
The synchronisation behaviour of Module 8029NTC can be adjusted following the link "
Exteded Configuration ". This function allows by reference to the associated system
properties Module 8029NTC to use NTP Server for synchronization and thus for the output of
time information for the synchronization of connected devices and components with inaccurate
NTP server.
Reasons for inaccurate NTP server could be e.g. poor network performance,
poor own accuracy or bad availability resulting in an insufficiently accurate synchronization of
the module with the standard settings.
This function should be disabled by default.
When using this function the specified accuracy of Module 8029NTC and
thus the accuracy of devices and components synchronized by the
module may be worsened.
When using this function the specified data of NTP accuracy stated in the
technical data of Module 8029NTC are not valid anymore.