Function Supported; Function Diagram Of Sigsel Function Block - GE FVP110 Maintenance Manual

GE Energy FVP 110 Fieldbus Valve Positioner Manual
Figure 67 Function Diagram of SIGSEL Function Block

Function Supported

This block is intended to be used in a forward path only and is not intended to receive
signals from the output of a controller. There is no back calculation support or propagation
of control status values. The processing of the block is as follows.
Input Processing
If DISABLE_n is true then don't process (ignore) the respective input IN_n.
Process the Use Uncertain as Good status options. Discard (ignore) inputs whose status
is bad.
If there are no inputs left, or fewer than MIN_GOOD inputs, then set the value of
SELECTED to zero. Do not do selection processing.
Selection Processing
If OP_SELECT is non-zero, the OP_SELECT value shall determine the selected input,
regardless of the SELECT_TYPE selection. Set SELECTED to the number of the input
used.
If SELECT_TYPE is First Good, transfer the value of the first remaining input to the
output of the block. Set SELECTED to the number of the input used.
If SELECT_TYPE is Minimum, sort the remaining inputs by value. Transfer the lowest
value to the output of the block. Set SELECTED to the number of the input with the lowest
value.
If SELECT_TYPE is Maximum, sort the remaining inputs by value. Transfer the highest
value to the output of the block. Set SELECTED to the number of the input with the
highest value.
150