Siemens SINAMICS DCM Manual page 589

Descriptions of functions
10.29 Serial interface with peer-to-peer protocol
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
Parameterization
Table 10- 54 Parameterizing the peer-to-peer interface
Function
Peer-to-peer protocol selection
PZD number
Baud rate
Bus terminator
Error statistics
590
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.
ac.maher.co.ir
Parameter
p50790 = 5
p50791 = 1 to 5 words
p50793 = 1 to 13, corresponding to between 300 and 187,500
baud
p50795 = 0: Bus terminator OFF
p50795 = 1: Bus terminator ON
r50799[1]: Displays receive errors on the peer-to-peer inter-
face
Operating Instructions, 02.2015, A5E34763375/RS-AA/001
SINAMICS DCM DC Converter