User Guide - Eurotherm Ltda

nanodac RECORDER/CONTROLLER: USER GUIDE4.23 MATH (2 INPUT)This ‘Toolkit’ option block allows one of a number of operations to be carried out using two input valueswhich may be analogue or digital in nature. Either or both of the inputs can be scaled, using a ‘Multiplier’.Input 1Input 1 MultiplierInput 2Input 2 MultiplierMath (2 input)blockFigure 4.23a Block schematicOutputMath (2 input).1OperationInput 1 MultiplierInput 2 MultiplierUnitsResolutionLow LimitHigh limitFallback StrategyFallback ValueInput SelectorInput 1Input 2OutputStatusSel11.01.0DegC20.00 DegC50.00 DegCClipGood0.0 DegCInput130.28 °C1.4030.28 DegCOkFigure 4.23b Block configuration (typical)4.23.1 ParametersOperation Add Output = Input 1 + Input 2Subtract Output = Input 1 - Input 2Multiply Output = Input 1 x Input 2Divide Output = Input 1 ÷ Input 2Abs Diff Output = the difference between Input 1 and Input 2, ignoring signSelect Max Output = whichever is the larger of Input 1 or Input 2Select Min Output = whichever is the smaller of Input 1 or Input 2Hot Swap Output = Input 2 if Input 1 is ‘Bad’; otherwise Output = Input 1Sample/Hold Output tracks Input 1 whilst Input 2 = 1. Output value is held whilst Input2 = 0 (See Section 4.23.2, below, for more details)Power* Output = Input 1 to the power of Input 2. (Output = Input 1 Input 2 )Square Root Output = √Input 1 (Input 2 ignored)Log Base 10 Output = Log 10 Input 1 (Input 2 ignored)Log Base e Output = Ln Input 1 (Input 2 ignored)Exponential Output = e Input1 (Input 2 ignored)10 to the X Output = 10 Input 1 (Input 2 ignored)Sel1Output = Input 1 if Input Selector = Input1Output = Input 2 if Input Selector = Input2* Note... For this implementation:0 to the power 0 = 1.Negative values raised to any power result in bad status.0 raised to a negative power results in bad status.HA030554Issue 7 Nov 12Page 163