Telemecanique Altivar 56 manual - Northern Industrial

Bulletin No. 50006-519-01BDecember 1996Chapter 3 — Start-UpControl TypesTable 17: Factory Settings – Inputs and OutputsInputs and Outputs Terminal Factory Setting ProgrammableLI1 Run Enable NoLogic InputsLI2 Run Forward NoLI3 Auto/Manual YesLI4 Auto Run YesAnalog InputsAI1 Speed Reference 1 YesAI2 Speed Reference 2 YesLO1 At Speed YesLogic OutputsLO2 Current Limit YesR1 Fault NoR2 Running State YesAnalog OutputsAO1 Motor Speed YesAO2 Motor Current YesCONTROL TYPESNormalNOLD (No Load)The control type affects the amount of available motor torque. The control typesetting is dependent on the type of motor used and the application. Control typesare described below. For information on changing the control type, see Chapter 5.The Normal control type is the factory setting. Normal is a sensorless flux vectorcontrol. In order to create high torque at low speeds, the drive controller maintainsa 90° phase relationship between the rotor and stator electromagnetic fields bycontinuously calculating the position of the rotor in relation to the electricalposition of the stator. It is generally applicable on asynchronous motors andprovides good torque performance. When using Normal control, the motorhorsepower must be equal to or one horsepower size less than the drive controllerhorsepower.NOLD control maintains a constant volts/frequency ratio during acceleration butonce the motor is stable, voltage to the motor is automatically reduced as afunction of load. At light load, the motor voltage is minimized, even at motor basespeed. This reduces audible motor noise without reducing motor RPM. NOLDcontrol should not be used with motors in parallel. For more information, seeChapter 5.© 1996 Square D All Rights Reserved35ηττπ://νιχοντρολσ.χοm