The ADLP-180 protocol was designed by ABB for communication between the SINDAC
control system and COLLECTOR 100, 300 and 400 substations. It represents an
upgrade from its predecessor ADLP-80. The difference to ADLP-80 is in the
use of standard mode (UART compatible) for data encoding on the physical layer.
ADLP-80 operates in half-duplex mode following the master/slave principle.
A master can communicate with up to 254 RTUs, an RTU only responds to an explicit
request from the master.