Direct Data Exchange On Profibus Dp - Siemens Simatic ET 200S Operating Instructions Manual

Functions
7.1

Direct data exchange on PROFIBUS DP

7.1
Introduction
The ET 200S can be used as the sender (publisher) for direct data exchange (data
exchange broadcast). The DP master you are using must, of course, also support direct data
exchange. You will find information on this in the description of the DP master.
Principle
Direct data exchange (slave to slave communication) is characterized by the fact that
PROFIBUS DP nodes "listen in" on which data a DP slave is returning to its DP master. This
mechanism enables the node that is "listening in" (receiver / subscriber) to directly access
changes to the input data of remote DP slaves.
During configuration in
area of the receiver where the sender's data are to be placed.
ET 200S
Operating Instructions, 12/2005, A5E00515771-03
STEP 7
use the respective I/O input addresses to specify the address
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