Efficient Networks S120 manual Setpoint assignment in the subscriber Setpoints

Communication PROFIBUS DP/PROFINET IO 10.2 Communication via PROFIBUS DP

10.2.4.2Setpoint assignment in the subscriber

Setpoints

The following statements can be made about the setpoint:

●Number of setpoint

When bus communications is being established, the master signals the slave the number of setpoints (process data) to be transferred using the configuring telegram (ChkCfg).

●Contents of the setpoints

The structure and contents of the data for the "SINAMICS slave" using the local process data configuring (p0922).

●Operation as "standard" slave

The drive (slave) only receives its setpoints and output data from the master.

●Operation as subscriber

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.

Example, setpoint assignment

The slave in the illustration receives its process data as follows:

●STW1 and STW2 from the master

●NSOLL_B and MOMRED as tap from a publisher

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67:	
162//B%	
162//B%	
67:	
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Figure 10-30 Example, setpoint assignment

Drive Functions	423
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4