ProSoft Technology 5201-DFNT-104C - Manual (Page 17)

104C Version 3 ♦ ProLinx Gateway Configuring the Gateway
IEC 60870-5-104 Client (Firmware v3.xx) Protocol Manual
ProSoft Technology, Inc. Page 17 of 139
August 4, 2011
2.1.1 [SNTP CLIENT]
The [SNTP CLIENT] section of the configuration (.CFG) file or of the PCB
configuration is used to specify the parameters for the Simple Network Time
Protocol (SNTP) Client provided with the protocol driver. The Client is required 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 updated time and date information is used when sending clock
synchronization commands to remote IEC-60870-5-104 servers.
SNTP is used for time synchronization of produced and consumed commands.
When an exchange occurs, the driver compares time stamps from the previous
exchange. When the new exchange time is less than the previous exchange, the
exchange is ignored. This can occur when the Ethernet packets are routed and
delayed. Time synchronization provides for data integrity.
As Seen in the Configuration (.CFG) File
# This section used to define the parameters required for the Simple Network
Time
# Protocol (SNTP) client.
[SNTP CLIENT]
#SNTP SERVER IP ADDRESS : 132.163.4.102 #IP address for NIST, Boulder,
Colorado
SNTP SERVER IP ADDRESS : 0.0.0.0 #IP Address for SNTP Server
TIME ZONE : 8 #Number of hours from GMT (-11 to
+11)
USE DAYLIGHT SAVINGS TIME : No #Yes or No
DATABASE REGISTER : 3000 #database word location to store
time
#(-1=ignore). This register value should
#be an even number.