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4-14 Genius Modular Redundancy Flexible Triple Modular Redundant (TMR) System
User’s Manual – March 1995
GFK-0787B
Voting for Three Analog Inputs
For a triplex input group with three inputs present, the GMR software compares three
corresponding analog input values. It selects the intermediate value and places it into
the voted inputs portion of the Analog Input Table.
Field Input Data
Input 1
Input 2
Input 3
152
150
110
150
Single Input Provided
to Application Logic
Field Input
Data
Duplex State
(low, high, or average value)
Default State
(hold last, minimum, or
maximum)
average
max.
100
175
minimum value
maximum value
The Duplex State and Default State are not used when three field inputs are available.
In the illustration above, inputs A, B, and C might represent the first input channel on
each block in a three-block group. The PLC would place the selected input value into the
first voted input word for that group.