Descriptions of functions
10.30 Serial interface with peer-to-peer protocol
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
625
Topologies
The peer-to-peer interface supports two topologies:
●
Point-to-point connection (see the series connection example further down)
–
4-wire connection between two converters
–
Data transmission in both directions
●
Bus connection (see the bus connection example further down)
–
2-wire connection between multiple converters
–
Data transmission in one direction only
–
The active sender is selected by means of the "Send enable" signal selected using
p50817. The send enable may only be at the "High" level for one converter in each
case. Converters whose send enable is at the "Low" level switch their sender to high
resistance.
Parameterization
Table 10- 74 Parameterizing the peer-to-peer interface
Function
Parameter
Peer-to-peer protocol selection
p50790 = 5
PZD number
p50791 = 1 to 5 words
Baud rate
p50793 = 1 to 13, corresponding to between 300 and
187,500 baud
Bus terminator
p50795 = 0: Bus terminator OFF
p50795 = 1: Bus terminator ON
Error statistics
r50799[1]: Displays receive errors on the peer-to-peer
interface
