Siemens SICLOCK TC 400 - Manual (Page 80)

Parameterization
9-78 © Siemens AG 2007 All Rights Reserved
SICLOCK ® TC 400
9.2 Linking the time receivers
The following options are available for the linking of the radio receivers:
• Ethernet link via NTP server
• Ethernet link via SIMATIC method
• OUTPUTs 1 to 3 via terminals (direct point-to point-connection to SICLOCK
TC 400)
The following section describes the parameterization options:
9.2.1 NTP server service
The NTP server is available on all four Ethernet ports and supports the any/uni-
cast and multicast modes in accordance with RFC2030.
Any/unicast (standard mode)
This mode is used, for example, by PCs and is available globally for all ports.
The parameter entry /NTP Server/NTP Server/operation (0.16.01) = "on" acti-
vates the NTP server in any/unicast mode. The setting options "off" and "only if
synchronized" are also possible.
Conditional operation is possible with the setting "only if synchronized". The
server service only functions if the device is externally synchronized.
Multicast
This mode must be set explicitly for each subnet.
You can set multicast mode for up to four subnets with the /NTP Server/Multi-
cast[4]/Multicast[x]/mode (0.16.02) parameter
The parameter entry "Multicast address" specifies the multicast IP address to be
used, e.g. 192.168.2.255".
Setting options for the parameter entry mode:
• off
• 10 s – standard operation, i.e. the coded time does no include time zones
• 60 s – standard operation, i.e. the coded time does no include time zones
• 10 s with local time – for receivers that do not have a calendar
• 60 s with local time – for receivers that do not have a calendar
The parameter entry "Multicast address" specifies the multicast IP address to be
used.