Technical data

Configuring time synchronization
5.8 Configuring time synchronization on an AS
Time synchronization (V7.1)
Function Manual, 03/2009, A5E01216578-01
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5.8.2 How to set time synchronization on an AS for NTP mode
The CPU with integrated Ethernet interface can only be synchronized via the NTP mode. We
recommend using a SICLOCK TC 400 as an external clock. Please note the following
restriction that is applicable in this case: The SICLOCK supports a maximum of 50 NTP
requests/sec. In the case of previous CPUs, we recommend that you continue to use S7
mode. These CPU types must not be used in PCS 7 configurations with only a plant bus
(and without a terminal bus).
The following describes the configuration of the time synchronization for the CPU types with
integrated Ethernet interface.
Requirements
● These CPUs can only be used in PCS 7 configurations with a plant bus and a terminal
bus.
● CPU with integrated Ethernet interface
Example:
– CPU 416-3 PN/DP
– CPU 414-3 PN/DP
Setting the CPU
1. Open the project in SIMATIC Manager.
2. Select the station that will be synchronized.
3. Open the configuration of the hardware.
4. Select the CPU, followed by Edit > Object properties.
The "Properties - CPU..." dialog box opens.