GE GFK-0787B user manual Voting for Three Analog Inputs

4

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		152
Field Input	Input 2		150
Data
	Input 3			110
Duplex State
				average
(low, high, or average value)
Default State
				max.
(hold last, minimum, or
maximum)

Single Input Provided to Application Logic

150

100minimum value

175maximum 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.

4-14	GeniustModular Redundancy Flexible Triple Modular Redundant (TMR) System	GFK-0787B
	User's Manual ± March 1995