Efficient Networks Siemens Sinamics S120 - Manual (Page 423)

Communication PROFIBUS DP/PROFINET IO
10.2 Communication via PROFIBUS DP
Drive Functions
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
423
10.2.4.2 Setpoint 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
6HWSRLQWVLQWKHVXEVFULEHU
$FWXDOYDOXHWHOHJUDPIURP
SXEOLVKHU E\WHV
6HWSRLQWWHOHJUDPIURP
PDVWHU E\WHV
162//B%
162//B%
67:
67:






S 
0RP5HG
Figure 10-30 Example, setpoint assignment