Setpoint Assignment In The Subscriber; Activating/Parameterizing Slave-To-Slave Communications - Siemens SINAMICS DCM Operating Instructions Manual

Links are possible to the device itself. This means, e.g. for a Double Motor Module, data can
be transferred from drive A to B. This internal link corresponds, as far as the timing is
concerned, to a link via PROFIBUS.
Prerequisites and supplementary conditions
The following supplementary conditions should be observed for the "slave-to-slave
communication" function:
● Number of process data, max. per drive
● Number of links to publishers
● Number of taps per link
Applications
For example, the following applications can be implemented using the "slave-to-slave
communication" function:
● Axis couplings (this is practical for isochronous mode)
● Specifying binector connections from another slave
10.2.8.2

Setpoint assignment in the subscriber

Setpoints
The following statements can be made about the setpoint:
● Number of setpoint
● Contents of the setpoints
● 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 by the bus system when booting.
SINAMICS DCM Control Module
Operating Instructions, 06.2010, C98130-A7067-A1-02-7619
When bus communication is being established, the master signals the slave the number
of setpoints (process data) to be transferred using the configuring telegram (ChkCfg).
The structure and contents of the data for the "SINAMICS slave" using the local process
data configuring (p0922).
The drive (slave) only receives its setpoints and 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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