Siemens sinamics dcp - 7.5.4 Direct data exchange

Operation
7.5 Communication via PROFIBUS DP
SINAMICS DCP
230 Operating Instructions, 09/2019, A5E34382853K
Example: Quick stop at telegram failure
Settings:
● CU_DCP p2047 = 20 ms
● DCP_CTRL p2044 = 0 s
Sequence:
1. Following a telegram failure and once the additional monitoring time (p2047) has elapsed,
binector output r2043.0 of drive object CU_DCP goes to "1".
Alarm A01920 and fault F01910 are output at the same time for DC_CTRL drive objects.
● When F01910 is output, an OFF3 is triggered.
Note
The additional monitoring time (p2047) is only useful for cyclic communication.
7.5.4 Direct data exchange
For PROFIBUS DP, the master interrogates all of the slaves one after the other in a DP
cycle. In this case, the master transfers its output data (setpoints) to the particular slave and
receives as response the input data (actual values). Fast, distributed data transfer between
drives (slaves) is possible using the "slave-to-slave communication" function without direct
involvement of the master.
The following terms are used for the function described in this chapter:
● Slave-to-slave communication
● Data exchange broadcast (DXB.req)
● Direct data exchange (is used in the following)