Nidec LEROY-SOMER Powerdrive MD2 Commissioning Manual

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Nidec LEROY-SOMER Powerdrive MD2 Commissioning Manual Manual pdf 52 page image

52ADVANCED PARAMETER-SETTING MODECommissioning manual Powerdrive MD2/FX4617 en - 2017.09 / e5.3.2 - Explanation of parameters in menu 202.01 : Post ramp referenceAdjustment range : • If 01.10 = 0 and 02.02 = 0: 0 to 01.06• If 01.10 = 0 and 02.02 = 1: 01.07 to01.06• If 01.10 = 1: ± 01.06Format: 32 bitsMeasurement of the post-ramp reference. Used for diagnostics.02.02 : Ramp bypass ( )Adjustment range : Off (0) or On (1)Factory setting : Off (0)Format: 8 bitsOff (0):Active ramps.On (1):Ramps short-circuited.02.03 : Ramp holdAdjustment range : No or Yes (1)Factory setting : NoFormat: 8 bitsNo:Ramp freed.Yes (1):The ramp is held and acceleration (or deceleration) is thereforeinterrupted.CAUTION:The ramp hold function is disabled if a stop command isgiven.02.04 : Deceleration ramp mode selectAdjustment range : Fixed ramp (0), Automatic ramp (1),Automatic ramp + (2),Fixed ramp + (3)Factory setting : Automatic ramp (1)Format: 8 bitsThis parameter is not relevant for the POWERDRIVE FXwhen 10.77 = No.Fixed ramp (0):Deceleration ramp imposed. If the deceleration ramp that hasbeen configured is too fast in relation to the inertia of the load,the DC bus voltage exceeds its maximum value (set in 02.08)and the drive trips on DC bus overvoltage.CAUTION:Select mode 02.04 = Fixed ramp (0) when a brakingresistor is being used.Automatic ramp (1):Standard deceleration ramp with automatic extension of theramp time in order to avoid causing a drive DC bus overvoltagetrip (threshold set in 02.08).Automatic ramp + (2):The drive allows the motor voltage to be increased up to 1.2times the rated voltage set in 05.09 (motor rated voltage), toavoid reaching the maximum DC bus voltage threshold(threshold set in 02.08). However, if this is not sufficient, thestandard deceleration ramp time is extended, to avoid causinga drive DC bus overvoltage trip.For the same amount of energy, mode 2 enables fasterdeceleration than mode 1.Fixed ramp + (3):Same as mode 2, but the ramp is imposed. If the configuredramp is too fast, the drive trips on DC bus overvoltage.CAUTION:In mode 2 and 3, the motor must be capable of withstandingadditional losses relating to the increase in voltage at itsterminals.02.05 : Not used02.06 : S ramp enabledAdjustment range : No or Yes (1)Factory setting : NoFormat: 8 bitsNo:The ramp is linear.Yes (1):A curved part (defined in 02.07) at the start and end of theramp avoids load swinging.CAUTION:The S ramp is disabled during controlled decelerations(02.04 = Automatic ramp (1) or Automatic ramp + (2)).02.07 : S ramp acceleration limitAdjustment range : 2 to 10Factory setting : 10Format: 16 bitsUsed to modify the ramp curve by the same value at the startand end of the ramp.The value 4 represents a time for the curved part of 25% of thetotal ramp and 10 represents a time for the curved part of 10%.Note:In S ramp mode, the total ramp time will be greater than that ofthe selected ramp.02.08 : Standard ramp voltageAdjustment range : 0 to 1300 VFactory setting : T rating = 710 V, TH rating = 1100 VFormat: 16 bitsThis parameter is not relevant for the POWERDRIVE FXwhen 10.77 = Off.It is used when the drive is configured in standard decelerationmode (02.04 = Automatic ramp (1) or Automatic ramp + (2)).The minimum value of this parameter must be 50 V higher thanthe DC bus voltage obtained with the maximum supply voltage(bus U = mains U x √2). If this condition is not adhered to, themotor performs a freewheel stop. If this threshold is too highand there are no resistors connected, the drive will trip on DCbus overvoltage.