Activating/Parameterizing Slave-To-Slave Communications - Siemens SINAMICS DCM Operating Instructions Manual

● Operation as "standard" slave
● Operation as subscriber
10.2.8.3

Activating/parameterizing slave-to-slave communications

The "slave-to-slave communication" function must be activated both in the publishers as well
as in the subscribers, whereby only the subscriber is to be configured. The publisher is
automatically activated during bus startup.
Activation in the Publisher
The master is informed abut which slaves are to be addressed as publishers with a different
layer 2 function code (DXB request) via the configuration of the subscriber links.
The publisher then sends its input data not only to the master but also as a broadcast
telegram to all bus nodes.
These settings are made automatically via the bus configuration tool (e.g. HW Config).
Activation in the Subscriber
The slave, which is to be used as Subscriber, requires a filter table. The slave must know
which setpoints are received from the master and which are received from a publisher.
The filter table is created automatically via the bus configuration tool (e.g. HW Config).
The following diagram shows the information contained in the filter table.
SINAMICS DCM DC Converter
Operating Instructions, 1.2012, C98130-A7066-A1-05-7619
The drive unit (slave) only receives its setpoints as output data from the master.
When a slave is operated as a subscriber, some of the setpoints are defined by one or
more publishers rather than by the master.
The slave is informed of the assignment via the parameterization and configuration
telegram when bus communication is being established.
Descriptions of functions
10.2 PROFIBUS
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