Clock Synchronization On The I/O Bus - Siemens SIMATIC ET 200M Operating Instructions Manual

Functions

8.3 Clock synchronization on the I/O bus

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 been
cleared with the configuration.
• The synchronization on the I/O bus takes place in the synchronization interval that has
been set on the PROFIBUS DP.
• In view of the time received on the PROFIBUS DP, the precision deteriorates only slightly.
The precision of 10 ms is always guaranteed.
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.
Note
In the H system you must insert a time master in both the PROFIBUS DP systems and
activate the time synchronization.
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Operating Instructions, 04/2022, EWA-4NEB7806006-09
ET 200M