User Guide - Eurotherm Ltda

nanodac RECORDER/CONTROLLER: USER GUIDE4.21 LOGIC (8 INPUT) BLOCKPart of the ‘Toolkit Blocks’ option, this block allows AND, OR and cascading* XOR logic operations to be carriedout on up to eight inputs.*Cascading XOR example for inputs 1 to 4: (((Input1 ⊕ Input2) ⊕ Input3) ⊕ Input4).Logic (8 input).1OperationNumber of InputsInvertInvert OutputInput 1Input 2OutputOR20OffThe number of invert ‘boxes’matches the ‘Number of inputs’value (2 in this example)Figure 4.21 Eight input logic block configuration4.21.1 ParametersOperation AND, OR or XORNumber of inputs The number of inputs to the logic operatorInvertAllows the user to invert individual inputs, as described below.Invert Output ‘Yes’ inverts the output statusInput 1The status of input 1, ignoring the Invert status. Cross = off; Tick = on.Inputs 2 to N As for input 1, where N = the value of the ‘Number of Inputs’ parameter.OutputOn or Off. Includes the effect of ‘Invert Output’ status.INPUT INVERSION1. Use the down arrow key to highlight the ‘Invert’ field and operate the scroll key to enter edit mode2. Use the up arrow key to highlight the first input to be inverted (the relevant input numbers appear inthe display boxes for uninverted inputs when highlighted).3. Once the required input box is highlighted, use the scroll key to change the numeric character to a ticksymbol (to invert) or change the tick character to a numeric character (to remove a previous inversion).4. Repeat for any further inputs, then operate the page key to confirm the changes and to quit edit mode.4.21.2 SchematicInput 1Invert 1Input 2Invert 2Input 3Invert 4Input 4Invert 8Input 5Invert 16Input 6Invert 32Input 7Invert 64Input 8Invert 128OutInvertOutputFigure 4.21.2 Logic (8 input) block schematicPage 160HA030554Issue 7 Nov 12