Logix5000 Controllers General Instructions - SLAC Confluence

276 Compute/Math Instructions (CPT, ADD, SUB, MUL, DIV, MOD, SQR, SQRT, NEG, ABS)Negate (NEG)The NEG instruction changes the sign of the Source and places theresult in the Destination.Operands:Relay LadderOperand Type Format DescriptionSource SINT immediate value to negateINTtagDINTDestinationREALA SINT or INT tag converts to a DINT value by sign-extension.SINT tag tag to store the resultINTDINTREALStructured Textdest := -source;Use the minus sign “−” as an operator in an expression. Thisexpression changes the sign of source and stores the result in dest.See Appendix B for information on the syntax of expressions withinstructured text.Function BlockOperand Type Format DescriptionNEG tag FBD_MATH_ADVANCED structure NEG structurePublication 1756-RM003I-EN-P - January 2007