4-34 B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUALFLEXLOGIC DESIGN AND MONITORING USING ENGINEER CHAPTER 4: INTERFACES4• Toolbars4.4.1 Design logicFlexLogic can be created with a block diagram. Note that although work is completed in the Offline Window area of thesoftware, communication occurs with the online device, for example when switching to monitoring mode.The following procedures are outlined:• Examples• Add existing FlexLogic equations• Create a logic diagram/sheet• Rapidly add logic blocks in sequence• Connect two logic diagrams/sheets• Optimize the logic• Change logic order• Search logic• Exclude sheet from compile4.4.1.1 ExamplesCreate oscillography trigger every three minutesFigure 4-30: Three-minute timer turns on LED for 10 secondsPreparation — Under Settings > Inputs/Outputs > Virtual Outputs, the first and second virtual outputs are namedOscTriggerTop logic — Three-minute timer triggerBottom logic — Turn on LED 1 for 10 seconds when the trigger startsCreate data logger trigger every seven minutesFigure 4-31: Seven-minute timer turns on LED for 10 secondsPreparation — Under Settings > Inputs/Outputs > Virtual Outputs, virtual outputs 3 and 4 are named DLTriggerTop logic — Seven-minute timer triggerBottom logic — Turn on LED 9 for 10 seconds when the trigger starts
