PowerFlex 750-Series AC Drives User Manual

G-14 Using DeviceLogixExample 3: Diverter OperationThis example demonstrates basic control logic to operate a diverter in aconveyor system. The diverter directs parts from an upstream conveyor toone of two downstream conveyors. It alternately sends ‘x’ parts down eachdownstream conveyor.SensorDiverterUpstream ConveyorDownstream ConveyorThe application consists of the following discrete I/O:Type Name DescriptionInputs Part Present Sensor Identifies that a part is presentOutputs Diverter Actuator Controls the diverter actuator to direct the flow of partsExample logic requirements:• If Part Present Sensor is ON, then increment the parts counter• If parts counter preset is reached, reset the counter and alternately set orreset the Diverter ActuatorParameter ConfigurationThe following parameters are configured for this example:Port ParameterNo. Parameter Value Description4.20 TO0 Select Port 14: DLX DigOut Sts2.DLX Output on I/O module in Port 4DOPSts014.33 DLX DIP 1 Port 4: Dig In Status.Input 1 Part Present Sensor input(I/O module in Port 4)14.51 DLX DigOut Sts2 Diverter Actuator outputFunctional Block ProgrammingThis example consists of 4 blocks that are shown below.Parts CounterFlip-Flop circuit1st time ON / 2nd time OFF on so onPart PresentPhotoeyeDIP 101 CTUCount UpEnableInCUEnable102 BANDBoolean AndEnableInIn1104 SETDSet DominantEnableInSet10Output to controlthe diverter0DOP 1ResetIn2Reset3 BANDBoolean AndEnableInIn1In210Because loop-back is performed,">>" is used to determine orderPowerFlex 750-Series User Manual – Publication 750-UM001C-EN-P – September 2009