Logix5000 Controllers General Instructions - SLAC Confluence

78 Bit Instructions (XIC, XIO, OTE, OTL, OTU, ONS, OSR, OSF, OSRI, OSFI)Output Unlatch (OTU)The OTU instruction clears (unlatches) the data bit.Operands:Relay LadderOperand Type Format Descriptiondata bit BOOL tag bit to be clearedStructured TextStructured text does not have an OTU instruction, but you can achievethe same results using an IF...THEN construct and an assignment.IF BOOL_expression THENdata_bit := 0;END_IF;See Appendix B for information on the syntax of constructs,expressions, and assignments within structured text.Description:Arithmetic Status Flags:Fault Conditions:When enabled, the OTU instruction clears the data bit. Whendisabled, the OTU instruction does not change the status of thedata bit.not affectednoneExecution:Conditionprescanrung-condition-in is falserung-condition-in is truepostscanRelay Ladder ActionThe data bit is not modified.The rung-condition-out is set to false.The data bit is not modified.The rung-condition-out is set to false.The data bit is cleared.The rung-condition-out is set to true.The data bit is not modified.The rung-condition-out is set to false.Publication 1756-RM003I-EN-P - January 2007