ABB RLM01 Inbetriebnahmeanweisungen Seite 6

Features/ Application
Note:
6
RLM01 does not support master redundancy where one master only runs line A and
the other one only line B. The bus communication is asynchronous, even if both
masters balance their program modules against each other on the applicational
level. A Melody central unit CMC 60/70 offers clock synchronous communication
because of redundant PROFIBUS terminals (A & B).
Network devices like repeater, FOC coupler, DP/PA converter as well as RLM01
cause a N x bit time delay of data telegrams. The delay time (see technical data) is
device specific and depends upon the selected baud rate. It must be taken into con-
sideration for the master bus configuration.
3BDD011600R05