A function used in Logical Switches that compares selectable source “a” to a chosen constant “x” using ‘Approximately equal’ as the comparator.  The function takes the value of TRUE when the source and the constant are approximately equal (+ or – 0.9) and FALSE when they are not approximately equal.  Two fields labeled V1 and V2 follow the function statement to define source “a” and value “x”.  For example if ‘Thr’ is selected from the drop down choice list in the V1 field, and ’30’ is set in the V2 field, the logical switch containing a~x will become “TRUE” when the throttle is between 29.1 and 30.9.  Any other throttle position will result in the Logical Switch containing this function to be FALSE.

A fourth field in the logical switch line permits a second source to become part of the comparison evaluation using the logical AND conjunction.  Continuing the prior example, if SG↓ is selected in the AND field, then the logical switch becomes TRUE only when the throttle is between 29.1 and 30.9 AND physical switch G is in the down position.

A 5th and 6th field in the logical switch line allow a duration and a delay to be imposed on the switch condition .

See also related functions

a<x   a>x

|a|=x   |a|<x   |a|>x


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