Parallel Operation Of Communication Interfaces - Siemens SINAMICS S120 Series Function Manual

Communication according to PROFIdrive

3.3 Parallel operation of communication interfaces

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 or PROFINET.
● An optional interface (COMM BOARD) for PROFINET (CBE20) or CANopen (CBC10) for
insertion in the Control Unit.
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 IF2 (CBE20); standard telegrams and PROFIsafe via IF1
● Operation of redundant communication interfaces
Assignment of communication interfaces to cyclic interfaces
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 or CANopen.
The assignment to the cyclic interfaces can essentially be freely defined by user
parameterization for the parallel operation of the communication interfaces.
Properties of the cyclic interfaces IF1 and IF2
Table 3- 5
Feature
Setpoint (BICO signal source)
Actual value (BICO signal sink)
48
Properties of the cyclic interfaces IF1 and IF2
IF1 IF2
r2050, r2060 r8850, r8860
p2051, p2061 p8851, p8861
Function Manual, 12/2018, 6SL3097-5BD00-0BP0
Communication