Logix5000 Controllers General Instructions - SLAC Confluence

Structured Text Programming 675CASE...OFUse CASE to select what to do based on a numerical value.Operands:Structured TextCASE numeric_expression OFselector1: statement;selectorN: statement;ELSEstatement;END_CASE;Operand Type Format Enternumeric_ SINT tag tag or expression that evaluates to anumber (numeric expression)expression INT expressionselectorDINTREALSINTimmediatesame type as numeric_expressionINTDINTREALIMPORTANTIf you use REAL values, use a range of values for a selectorbecause a REAL value is more likely to be within a range ofvalues than an exact match of one, specific value.Description:The syntax is:specify as manyalternative selectorvalues (paths) as youneedCASE numeric_expression OFselector1 : ;...selector2 :selector3 :;...;...statements to execute whennumeric_expression = selector1statements to execute whennumeric_expression = selector2statements to execute whennumeric_expression = selector3Publication 1756-RM003I-EN-P - January 2007