USER MANUAL
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| HCO-3931
3.4.4 The Switch Configuration panel
The rules engine applies the fixed weight associated with the selected level to establish which input must be selected
for the program output, also taking into consideration the relative weight of the inputs used by the engine.
Along with the probes configuration settings, the switch configuration panel allows configuring the rules that the
automatic mode engine uses to establish when to switch PROGRAM to a different input, as well as which input to use.
The automatic mode rules engine uses a weighting scheme to
compute an input’s “health” and determine the best
input to use. In this scheme:
Not all inputs are equal. For example, MAIN has a weight of 100 whereas EMERGENCY 2 has a weight of
50.
The measured impairment of each input is factored into the evaluation. For example, an input with no
impairment has a weight of 1, whereas an input with a high level of imparment has a weight of 0.2.
The following weighting table shows the permutations of this weighting scheme.
Input
MAIN
BACKUP
EMERGENCY1 EMERGENCY2
Weight
100
75
60
50
Impairment
Weight
None
1
100
75
60
50
Low
0.45
45
33.75
27
22.5
High
0.2
20
15
12
10
Figure 22
Auto-Switch Weighting Table
