Lenze I/O system 1000 System Manual - Manual (Page 388)

PROFIBUS communication
System configuration
Multi−master system
9
l
388 EDSIO1000 EN 7.0
9.2.3 Multi−master system
Token
Master 1
(DPM 1)
Master 3
(DPM 1)
Master 2
(DPM 2)
Slave 1 Slave 2 Slave 3 Slave 4 Slave 5 Slave 6
0 1
2
epm−t226
Fig. 9−2 PROFIBUS−DP multi−master system
0
Subsystem consisting of master 1 and slaves 1 ... 3 with cyclic data transfer.
1 Subsystem consisting of master 3 and slaves 4 ... 6 with cyclic data transfer.
2
For configuration and diagnostics, master 2 can communicate with slave 1 ... 6. The data
transfer is acyclic.
In multi−master operation, several masters are connected to one bus. They either form
independent subsystems consisting of one class 1 master (DPM 1) each and the
corresponding slaves, or additional class 2 masters (DPM 2) for configuration and
diagnostics. The input and output images of the slaves can be read by all masters. Only the
respective class 1 master (DPM 1) can write the outputs.