Logix5000 Controllers General Instructions - SLAC Confluence

406 Array (File)/Shift Instructions (BSL, BSR, FFL, FFU, LFL, LFU)ConditionRelay Ladder Actionrung-condition-in is trueexamine .EU bit.EU = 0.EU bit is set .LEN < 0yes.EU = 1no.LEN < 0yes.POS < 0yesnono.POS < 0yes.EM bit is cleared.EM bit is setno.EM bit is cleared.EM bit is set.LEN > size ofarrayyesmajor faultno.POS = 0yes.EM bit is set.POS ≤ 1yes.EM bit is setnono.POS ≥ .LENyes.DN bit is set.POS < 1yesDestination = 0nono.POS = .POS -1Destination = FIFO[0]FIFO[i - 1] = FIFO[i]i < .LENyesrung-condition-out is set totruenoendpostscanThe rung-condition-out is set to false.Publication 1756-RM003I-EN-P - January 2007