5
5.10 Slave–to–slave communications (from SW 4.1)
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SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
5.10.2
Setpoint assignment in the subscriber
The following statements can be made about the setpoint/reference
values:
Number of setpoint/reference values
When bus communications is being established, the master signals
the slave the number of setpoints/reference values (process data) to
be transferred using the configuring telegram (ChkCfg).
Contents of the setpoints/reference values
The structure and contents of the data are defined for the ”DP slave
611U” using the local process data configuring (P0915, P0922).
Operation as ”standard” DP slave
The drive (slave) only receives its setpoints and output data from
the DP master.
Operation as subscriber
When operating a slave subscriber, some of the setpoints are en-
tered from one or several publishers instead of from the master.
The slave is signaled the assignment when bus communications are
being established, using the parameterizing and configuring tele-
gram.
The slave in Fig. 5-31 receives its process data as follows:
STW1 and STW2 from the master
NSOLL_B and MomRed as tap from a publisher
STW1
NSOLL_B
NSOLL_B
STW2
MomRed
Setpoints in the subscriber
Setpoint telegram from the master
(bytes)
Actual value telegram
from the publisher (bytes)
1
2
3
4
5
16
P0915, P0922
Fig. 5-31 Example, setpoint assignment
Setpoints?
Example, setpoint
assignment
5 Communications via PROFIBUS DP
08.99
07.01
08.01
