ProSoft Technology PTQ-104C - Manual (Page 60)

Module Configuration 49TPTQ-104C ♦ 48TQuantum Platform
12TUser Manual 47TIEC 60870-5-104 Client
5.4 [SNTP CLIENT]
The [SNTP CLIENT] section of PCB is used to specify the parameters for the
Simple Network Time Protocol (SNTP) Client provided with the protocol driver.
This client is read in order to keep the driver's internal clock set correctly. This
version of the driver supports SNTP Revision 3 and stratum between 1 and 14.
The SNTP driver will compute a new clock value every 5 minutes using the
average value of 10 samples each collected over an approximate 6-second
period. This new value will be used to adjust the clock maintained by the SNTP
driver and used by the application.
If a valid database register is specified, the driver will place the time value into
the module's database. The first two registers will contain the number of seconds
and the next two registers will contain the number of microseconds since January
1, 1970.
A list of some of the common NTP servers can be obtained at http://www.ntp.org/
or, http://support.ntp.org/bin/view/Servers/WebHome
Other server lists can be found by searching the World Wide Web for "NTP
Servers".
5.4.1 NTP Server IP Address
Enter in dotted notation
This parameter sets the IP address of the NTP server to utilize for time
acquisition. Select an NTP server with the greatest accuracy that can be
accessed all the time from the network. Setting this IP address to 0.0.0.0
disables SNTP server requests.
Page 60 of 136 ProSoft Technology, Inc.
March 4, 2013