Logix5000 Controllers General Instructions - SLAC Confluence

460 Program Control Instructions (JMP, LBL, JSR, RET, SBR, JXR, TND, MCR, UID, UIE, AFI, NOP, EOT, SFP, SFR, EVENT)End of Transition (EOT)The EOT instruction returns a boolean state to an SFC transition.Operands:Relay LadderOperand Type Format Descriptiondata bit BOOL tag state of the transition(0=executing, 1=completed)EOT(data_bit);Structured TextThe operands are the same as those for the relay ladderEOT instruction.Description:Because the EOT instruction returns a boolean state, multiple SFCroutines can share the same routine that contains the EOT instruction.If the calling routine is not a transition, the EOT instruction acts as aTND instruction (see page 452).The Logix implementation of the EOT instruction differs from that in aPLC-5 controller. In a PLC-5 controller, the EOT instruction has noparameters. Instead, the PLC-5 EOT instruction returns rung conditionas its state. In a Logix controller, the return parameter returns thetransition state since rung condition is not available in all Logixprogramming languages.Arithmetic Status Flags:Fault Conditions:not affectednoneExecution:Condition Relay Ladder Action: Structured Text Action:prescan The rung-condition-out is set to false. No action taken.rung-condition-in is false The rung-condition-out is set to false. narung-condition-in is true The instruction executes.naThe rung-condition-out is set to true.EnableIn is set na EnableIn is always set.The instruction executes.instruction execution The instruction returns the data bit value to the calling routine.postscan The rung-condition-out is set to false. No action taken.Publication 1756-RM003I-EN-P - January 2007