Siemens SIMATIC ET 200S Manual page 71

Functionality in direct communication
The IM 151-7 CPU offers the following functionality in direct communication:
S Transmitter:
As an I slave, the IM 151-7 CPU sends the process outputs, configured for
direct communication, to all bus nodes as a broadcast frame. Other recipients
filter the relevant data from this broadcast frame.
S Receiver:
Filtering of the data from the broadcast frame sent by transmitters which have
been configured using STEP 7 as being relevant for direct communication.
Diagnostics in direct communication
Only the results of connection monitoring can be used in the diagnostics of the DP
slaves configured for direct communication, because diagnostic messages of the
DP slaves that have been listened in on are only reported to the DP master.
The asynchronous OB 86 is called in the event of station failure and reintegration.
If data is accessed during a station failure of the sender, an I/O access error is
detected and OB 122 is called. Only the identifiers "module plugged" and "module
available" are relevant for the module status data.
ET 200S IM 151-7 CPU Interface Module
A5E00058783-04
ET 200S in the PROFIBUS Network
4-13