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Telemecanique Altivar 56 manual - Northern Industrial

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Chapter 5 — ConfigurationBulletin No. 50006-519-01B6 →Drive Configuration Menu December 19962-Wire CommandThe use of 2-wire command will allow the drive controller to restart withoutoperator intervention after fault reset or restoration of power provided that a runcommand is present. For applications where automatic restarting may pose ahazard to personnel, the use of 2-wire command is not recommended.LI1RunEnableLI2Fwd1010+ Speed Ref- Speed RefFigure 39: Timing Diagram for 2-Wire CommandIf 2-wire command is selected, LI1 is Run Enable and must always be high for thedrive controller to run. If drive controller is running and LI1 goes low, the drivecontroller will freewheel stop.If the drive controller is running and the keypad STOP key is pressed, regardlessof whether the drive is in Keypad or Terminal mode, the drive controller will stop,following the normal ramp.To restart the drive controller, the Run command must be set to low state. Then thedrive controller will restart on the next command to run.For a wiring diagram, refer to Chapter 2.3-Wire CommandThe use of 3-wire command requires operator intervention after fault reset orrestoration of power to restart the drive controller.LI1RunEnableLI2Fwd1010+ Speed Ref- Speed RefFigure 40: Timing Diagram for 3-Wire CommandIf 3-wire command is selected, LI1 is Stop, normally-closed. LI1 must be closed forthe drive controller to run. The forward input must momentarily transition toactive to start the drive controller. If the drive controller is running and LI1 goeslow, the drive controller will stop, following the normal ramp. If the drivecontroller is running and the keypad STOP key is pressed, regardless of whetherthe drive is in Keypad or Terminal mode, the drive controller will stop, followingthe normal ramp.To restart the drive controller, the Run command must be set to low state. Then thedrive controller will restart on the next Run command.Refer to Chapter 2 for wiring diagram.68 © 1996 Square D All Rights Reservedηττπ://νιχοντρολσ.χοm

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