Parallel Operation Of Communication Interfaces - Siemens SINAMICS Series Operating Instructions Manual

Descriptions of functions
10.3 Communication according to PROFIdrive
10.3.3

Parallel operation of communication interfaces

The two cyclic interfaces for the setpoints and actual values differ by the parameter ranges
used (BICO technology, etc.) and the functions that can be used. The interfaces are
designated as cyclic interface 1 (IF1) and cyclic interface 2 (IF2).
Cyclic process data (setpoints / actual values) are processed using interfaces IF1 and IF2.
The following interfaces are used:
● Onboard interfaces of the Control Unit for PROFIBUS DP
● An additional interface (COMM-BOARD) for PROFINET or Ethernet/IP (CBE20
Communication Board Ethernet) for insertion in the Control Unit as an option.
Parameter p8839 is used to set the parallel use of the Control Unit onboard interfaces and
COMM-BOARD in the SINAMICS system. The functionality is assigned to interfaces IF1 and
IF2 using indices.
For example, the following applications are possible:
● PROFIBUS DP for control and PROFINET to acquire actual values / measured values of
the drive
● PROFIBUS DP for control and PROFINET for engineering only
● Mixed mode with two masters (the first for logic and coordination, and the second for
technology)
● SINAMICS Link via IF1 (CBE20 Communication Board Ethernet); PROFIBUS (only DO
Drive, max. 16 PZD) IF2
● Operation of redundant communication interfaces
Assignment of communication interfaces to cyclic interfaces
The two cyclic interfaces for the setpoints and actual values differ by the parameter ranges
used (BICO technology, etc.) and the functions that can be used. The interfaces are
designated as cyclic interface 1 (IF1) and cyclic interface 2 (IF2).
With the factory setting p8839 = 99, the communication interfaces are permanently assigned
one of the cyclic interfaces (IF1, IF2), depending on the communication system, e.g.
PROFIBUS DP, PROFINET.
The assignment to the cyclic interfaces can essentially be freely defined by user
parameterization for the parallel operation of the communication interfaces.
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SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A