Siemens SIMATIC ET 200M Operating Instructions Manual page 163

8.3 Clock synchronization on the I/O bus
Properties
The interface module IM 153-2 as of 6ES7153-2Bxx1-0XB0 supports the time
synchronization on the I/O bus.
● The IM 153-2 sends the current time to the I/O bus after its time synchronization has
● The synchronization on the I/O bus takes place in the synchronization interval that has
● In view of the time received on the PROFIBUS DP, the precision deteriorates only
Operating steps for activation
The activation of the time synchronization on the I/O bus can be carried out as follows:
PROFIBUS DP:
1. Complete the PROFIBUS DP with a time master.
2. Activate the time synchronization in the properties of the DP master.
Configuring the IM 153-2:
1. In HW-Config, open the dialog DP slave properties > Time-of-day Synchronization.
2. Activate the Time-of-day Synchronization check box.
3. As a synchronization interval, enter the effective synchronization interval that is set on
ET 200M
Operating Instructions, 12/2008, EWA-4NEB780600602-08
been cleared with the configuration.
been set on the PROFIBUS DP.
slightly. The precision of 10 ms is always guaranteed.
Note
In the H system you must insert a time master in both the PROFIBUS DP systems and
activate the time synchronization.
PROFIBUS DP (e.g. 10 s).
Figure 8-19 Dialog box DP slave properties > Time-of-day Synchronization
8.3 Clock synchronization on the I/O bus
Functions
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