Siemens SINAMICS DCM Manual page 588

10.29 Serial interface with peer-to-peer protocol
General information
The peer-to-peer interface enables BICO interconnections across several SINAMICS DCMs,
as well as allowing the peer-to-peer interface to establish signal connections between
converters in the SINAMICS DC MASTER range (MLFB = 6RA80...) and converters in other
ranges, such as SIMOREG DC-MASTER (MLFB = 6RA70...) and SIMOREG K (MLFB =
6RA24...).
Properties
A "peer-to-peer connection" refers to "a connection between partners with equal status".
Unlike the classic master-slave bus systems (such as PROFIBUS or USS), peer-to-peer
connections enable the same converter to act as both a master (setpoint source) and a slave
(setpoint recipient).
Signals can be transferred via the peer-to-peer connection from one converter to another in
fully digital format.
● Velocity setpoints for creating a setpoint cascade, e.g. in paper making machines, film
manufacturing machines, and wire drawing machines, as well as fiber stretching plants
● Torque setpoints for load distribution control systems on drives that are coupled either
mechanically or by means of the material, e.g. horizontal-shaft drives on a printing
machine or S-roll drives
● Acceleration setpoints (dv/dt) for acceleration precontrol in multi-motor drives
● Control commands
The peer-to-peer interface uses the RS485 interface at connector X177 (terminals 37, 38,
39, and 40).
Function diagrams
Function diagram FP9300 shows the settings and BICO interconnection options for the
"peer-to-peer connection".
Diagnostics
Parameter r50799 contains information about the distribution of error-free telegrams and
telegrams with errors over time, as well as the type of any communications errors that occur.
SINAMICS DCM DC Converter
Operating Instructions, 02.2015, A5E34763375/RS-AA/001
10.29 Serial interface with peer-to-peer protocol
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Descriptions of functions
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