Logix5000 Controllers General Instructions - SLAC Confluence

370 Array (File)/Misc. Instructions (FAL, FSC, COP, CPS, FLL, AVE, SRT, STD, SIZE)Execution:ConditionprescanRelay Ladder ActionThe .EN bit is cleared.The .DN bit is cleared.The .ER bit is cleared.The rung-condition-out is set to false.rung-condition-in is falseexamine .DN bit.DN bit = 0.DN bit = 1.EN bit is cleared.ER bit is cleared.DN bit is clearedrung-condition-out is set tofalseendrung-condition-in is trueThe AVE instruction calculates the average by adding all the specified elements in thearray and dividing by the number of elements.Internally, the instruction uses a FAL instruction to calculate the average:Expression = average calculationMode = ALLpostscanFor details on how the FAL instruction executes, see page 9-339.The rung-condition-out is set to false.Publication 1756-RM003I-EN-P - January 2007