Logix5000 Controllers General Instructions - SLAC Confluence

396 Array (File)/Shift Instructions (BSL, BSR, FFL, FFU, LFL, LFU)FIFO Load (FFL)The FFL instruction copies the Source value to the FIFO.Operands:Relay LadderOperand Type Format DescriptionSource SINT immediate data to be stored in the FIFOINTtagDINTREALstringFIFOstructureThe Source converts to the data type of the array tag. A smaller integerconverts to a larger integer by sign-extension.SINT array tag FIFO to modifyINTDINTspecify the first element of the FIFOdo not use CONTROL.POS in the subscriptREALstringstructureControl CONTROL tag control structure for the operationtypically use the same CONTROL as theassociated FFULength DINT immediate maximum number of elements the FIFO canhold at one timePosition DINT immediate next location in the FIFO where theinstruction loads datainitial value is typically 0If you use a user-defined structure as the data type for the Source orFIFO operand, use the same structure for both operands.Publication 1756-RM003I-EN-P - January 2007