《winCC软件冗余》.pdf

03.98 Software Redundancy 1 Software Redundancy Within WinCC, the software redundancy feature makes it possible to monitor critical sections of a plant by using a redundant connection to several PLCs. WinCC (Tag Management) Tag 1 Tag 2 Redundant . . Tags Tag n Logical T 1 T 2 T 3 Connections Non-redundant Non-redundant Connection to PLC 1 Redundant Connection to PLC 2 Connection PLC 1 PLC 2 Redundant PLC Section Software redundancy considerably improves reliability when critical plant sections are to be monitored. For example, a redundant connection to two PLCs means that one PLC takes over if the other PLC fails. Using software redundancy does not mean that you can only establish red