Connecting Time Receivers; Ntp Server Service - Siemens SICLOCK TC100 Operating Instructions Manual

Parameter assignment
9.2

Connecting time receivers

The following options are available for connecting the time receivers::
Ethernet connection via NTP Server
Ethernet connection via SIMATIC Verfahren
The following sections describe the parameter assignment options.
9.2.1

NTP server service

An NTP server is available at the Ethernet port. The NTP server supports the
modes Any/unicast and Multicast according to RFC2030.
Any / unicast (standard mode)
This mode is used by, e.g., PCs.
You activate the NTP server in Any/unicast mode with the parameter entry
/NTP Server/NTP Server/Operation (0.16.01) = "On". The settings "Off" and "Only
when synchronized" are also available as options.
The setting "Only when synchronized" enables conditional operation. The server
service is only active when the device is externally synchronized.
Multicast
This mode has to be set explicitly for each subnet.
You can set Multicast mode for up to four subnets with the parameter
/NTP Server/Multicast[4]/Multicast[x]/Mode (0.16.02).
You define the Multicast IP address that will be used with the parameter entry
"Multicast address", e.g. 192.168.2.255.
Setting options for parameter entry mode:
Off
10s – Standard mode, that is the coded time is time-zone independent
60s – Standard mode, that is the coded time is time-zone independent
10s with local time – for receivers without their own calendar
60s with local time – for receivers without their own calendar
You define the Multicast IP address that will be used with the parameter entry
"Multicast address".
9-7
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SICLOCK TC100 Operating Instructions