ac800 to ac450 communication failure
in our plant we have 3 ac450 controller communicating each other on masterbus
with scada package of abb 800xa and 3 separate server/client system
recently we had a new project their its ac800pm866 processor module it is having a separate server which will not mix in our old systemm
we made a communication between these 2controller for data exchange through ci855 module
first we communicate the first old controller ac450 working fine after 1month we communicated second old controller from that day onwards we have frequent communication failure
is their any limitation forci855 for communication with ac450
please help me with this regard
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