Siemens TIM 4R-IE DNP3 - Page 136

Configuration in STEP 7
5.9 Configuring time-of-day synchronization
TIM DNP3
136 System Manual, 06/2014, C79000-G8976-C253-03
5.9
Configuring time-of-day synchronization
5.9.1
Configuring time-of-day synchronization - overview
Configuring time-of-day synchronization
You configure time-of-day synchronization in STEP 7.
Note
Avoiding time-of-day inconsistencies
Note the following points relating to time
-of-day synchronization:
•
Make sure that only one subscriber ever operates as the time-of-day master in a DNP3
network.
•
Make sure that only one of the methods of time-of-day synchronization listed below is
used.
Initially, specify 1 time master in the network. This obtains its time of day from a PC or an
NTP server.
● You make the settings for synchronization by a PC in the "Time Service" tab of the TIM,
see below.
● You make the settings for synchronization of a TIM 4-IE DNP3 by an NTP server in the
following tabs: "NTP" tab (Page 133)
To connect the TIM to the network / Internet in which the NTP server is located, you do
not need to specify an interface in the configuration. Simply enter the IP address of the
NTP server in the "NTP" tab mentioned above.
It is advisable to separate the two interfaces of the TIM 4R IE DNP3 into the internal data
network (your system) and external network (connection to NTP server).
The procedure that follows differs depending on the S7 device family (S7-300 / S7-400) and
on the network type.
Time-of-day synchronization via the TIM in an S7-300
You specify day direction of the time-of-day synchronization with the type of connected
interfaces of the TIM modules. The configuration is slightly different for the various network
types:
● Ethernet
The direction of time-of-day transfer is made here by setting the "connection mode" of the
TIM interfaces. Set the connection mode in the properties dialogs of the TIM in the
"Interfaces" tab; for the master station set "DNP3 master station" and for the other TIM
modules set "DNP3 station" or "DNP3 node station".
● Dedicated line / dial-up network
Here, the direction of the time of day transfer is decided by the setting of the "Network
node type" of the connected TIM modules (properties dialog of the TIM > "Interfaces" tab