Allen-Bradley LOGIX 5000 Reference Manual page 59

Process Control Instructions
Output Parameter Data Type
EnableOut BOOL
Out REAL
Status DINT
InstructFault (Status.0) BOOL
XY1SizeInv (Status.1) BOOL
XY2SizeInv (Status.2) BOOL
XisOutofOrder (Status.3) BOOL
Description
The following illustration shows how the FGEN instruction converts a twelve-
segment curve.
The X-axis parameters must follow the relationship:
X[1] < X[2] < X[3] < ... < X[XY<n>Size],
where XY<n>Size > 1 and is a number of points in the piece-wise linear curve and
where n is 1 or 2 for the table selected. You must create sorted X-axis elements in
the X arrays.
The Select input determines which table to use for the instruction. When the
instruction is executing on one table, you can modify the values in the other table.
Change the state of Select to execute with the other table.
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Description
Indicates if instruction is enabled. Cleared to false on
overflow
Output of the instruction.
Status of the function block.
Instruction generated a fault.
Size of table 1 is invalid or not compatible with the array
size.
Size of table 2 is invalid or not compatible with the array
size.
The X parameters are not sorted.
Chapter 1
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