SOMFY Sonesse 30 RS485 Guia De Instalacion página 60

RS485 communication standard
All signals on the physical link between devices should comply with EIA/TIA-485-A standard.
Recommended network cable : Shielded, two twisted-pair type 22 - 24 AWG
Communication mode : half-duplex
Time between two messages, minimum 100 ms
Each character is coded as follow :
Baud Rate
Start bit
Data bits
Parity
Stop bit
RS485 control wiring
Pin 1 (red) = (+)
Pin 2 (green) = Ground
Pin 3 (black) = (-)
58
Character coding
4800
Logical Level 0
8
Odd
Logical Level 1
Copyright © 2011 Somfy SAS. All rights reserved - V1 - 01/2011
+/-100
Less significant bit transmitted first