Revision 4 Foundation Fieldbus RMA803 Remote Indicator User's Guide Page 65
Selection Processing
• If OP_SELECT is non-zero, the OP_SELECT value determines the selected input,
irrespective of the SELECT_TYPE selection. The value of SELECTED is the number of the
input used.
• If SELECT_TYPE is ‘First Good’, it transfers the value of the first remaining input to the
output of the block. The value of SELECTED is the number of the input used.
Figure 13 : Input Selector schematic diagram
• If SELECT_TYPE is Minimum, it transfers the lowest value to the output of the block. The
value of SELECTED is the number of the input with the lowest value.
• If SELECT_TYPE is Maximum, it transfers the highest value to the output of the block. The
value of SELECTED is the number of the input with the highest value.
• If SELECT_TYPE is Middle, if there are 3 or 4 values, the highest and lowest value is
discarded. The average of the remaining two values is computed, and the value is transferred to
the output of the block. The value of SELECTED becomes zero if an average is used, else the
value of SELECTED is the number of the input with the middle value.
• If SELECT_TYPE is Average, it computes the average of the remaining inputs and transfers
the value to the output of the block. The value of SELECTED is the number of inputs used in
the average.
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