Rockwell Automation AADvance Controller Configuration Guide - Manual (Page 65)

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Document: 553633
ICSTT-RM405f-EN-P
Issue 07
4-25
Note: The first address represents that of the primary server and the second one
the secondary server for each processor module. At start up the SNTP client will
choose the primary server of the "lowest" slice; if no primary signal is valid the
SNTP client looks for an active secondary server signal.
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For non-fault tolerant operation, define one SNTP server for only one
processor. The other processors will automatically synchronize to it and will
inherit the time.
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For fault-tolerant SNTP client operation, define more than one server address.
3) Select the server Version.
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Choose SNTPv1, SNTPv2, SNTPv3, SNTPv4 or Unknown.
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If you do not know the version of NTP/SNTP that the server offers, choose
Unknown. This will disable some validation of the incoming signal.
4) Set the Mode to Unicast or Broadcast as required.
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In Broadcast mode the SNTP client will passively wait for regular broadcasts
from the server. This reduces network traffic and hence the load on the
servers.
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In Unicast mode the SNTP client will actively poll as many servers as are
configured every few seconds and use their responses. The polling rate (19s) is
based on the drift rate of the real-time clock and cannot be configured.
5) Click Apply.
Configure the Controller as an SNTP Server
To configure the SNTP servers service do the following:
1) Select the SNTP Servers tab.
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The SNTP Server Editor dialog box opens.
2) Select the Unicast or Broadcast mode.