GE GFK-0787B user manual Duplex State

6

Vote	Similarly, select which Voting Adaptation method will be used for each
Adaptation	circuit.

Vote Adapt Mode: Specify the manner in which the PLCs should perform voting adaptation. During operation, if a failure (discrepancy fault, Autotest fault, or Genius fault) occurs, the GMR software will reject the faulty data and perform voting adaptation as configured here.

For a triplex group, if input voting should go from three inputs to two inputs to one input, select 3±2±1±0. If voting should go from three inputs to two inputs to the default state, select 3±2±0.

For a duplex group, if input voting should go from two inputs to one input, select 3±2±1±0. If voting should go from two inputs to the default state, select 3±2±0.

For a simplex group, select 3±2±1±0.

Duplex State:

For a triplex group, the Duplex State determines the vote type when there are just two inputs present. Its operation is described on page 4-8.

HUsing 0 as the Duplex State means that when two I/O blocks (duplex) are online, the voted input state will be 0 if either input sets it to 0. It will not be 1 unless both inputs set it to 1.

HSimilarly, using 1 as the Duplex State means that when two blocks are online, the voted input state will be 1 if either input sets it to 1. It will not be 0 unless both of the inputs set it to 0..

For a duplex group, this state is used as the third input in the 2 out of 3 vote.

For a simplex group, this field does not apply.

GFK-0787B Chapter 6 Configuration 6-31