MENTOR 12 USER’S MANUAL SECTION 3: ADVANCED CONTROL – Page 73
BINARY SEARCH Function
The Binary Search function, which you can select by
pressing the relative button marked “Binary Search” on the
function selection column, on the left of the advanced control
screen, enables you to carry out upward and downward
pulse ramps of any output parameter available on the
Mentor. However, unlike the two test functions described
above, it does not use a fixed increase value, as it adapts to
different values to make an effective search.
In the Binary Search, a preset condition state occurs
between each increase (normally an equivalent state to a
Pre-Fault) so this function permits “quitting” the fault
conditions and “entering” them with each increase.
As it is possible in this function to define ALL the magnitudes
that are not selected to be varied during the ramp, what we
really have here is a way of carrying out a search using
FAULTS, each state with its pre-fault and its fault.
In both functions described above (Ramp and Pulse Ramp)
an initial value and an end value are assumed for the ramp,
as well as a fixed increase value for each step. These two
functions are excellent to verify the accuracy of a trip value
within some known margins. That is, for example, if we know
the assumed trip value of a relay, we would start the ramp at
80% of this value and we would set 110% of the value as the
end value, to cover a small margin of error. But if we do not
know the trip point, not even its order of magnitude, to find this, we would have to start
the ramp at a minimum value and end it at a very high value. If you require a certain
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