Schneider Electric vw3-a58101 manual LIN linear S S-shape ramp, Curve coefficient is fixed

GP_ATV58_EN.fm Page 82 Mardi, 2. avril 2002 6:09 18

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Code	Description	Adjustment range	Factory setting
Fdb	I lim. Adapt	No-Yes	No

Adaptation of the current limit according to the output frequency.

This parameter only appears in the "variable torque" VT macro-configuration (ventilation applications where the load curve changes according to the density of the gas).

brA DecRampAdapt No-Yes No

Activation of this function is used to increase the deceleration time automatically if this has been set to too low a value for the inertia of the load, thus avoiding an ObF fault.

This function may be incompatible with positioning on a ramp and with the use of a braking resistor. The factory setting depends on the macro-configuration used :

No for handling, Yes for variable torque and general use.

If relay R2 is assigned to the brake sequence function, the parameter brA remains locked on No.

Frt SwitchRamp2- Hz 0 to HSP 0 Hz

Ramp switching frequency.

Once the output frequency exceeds Frt, the ramp times taken into account are AC2 and dE2.

Stt Type of stop STN - FST - NST - DCI STN

Type of stop:

When a stop is requested, the type of stop is activated until the Ftt threshold (adjust menu) is reached.

Below this threshold, freewheel stop is activated. Stn: On ramp

Fst: Fast stop

Nst: Freewheel stop

Dci: DC injection stop

This parameter cannot be accessed if the R2 relay is assigned to the “BLC: Brake Logic” function.

rPt	Ramp Type			LIN - S - U						LIN
	Defines the shape of the acceleration and deceleration ramps.
	LIN : linear S : S-shape ramp			U : U-shape ramp
		f (Hz)			f (Hz)
		GV			GV				The curve coefficient is fixed,
	S-shape ramps								with t2 = 0.6 x t1
									with t1 = set ramp time.
		0			0			t
			t2		t	t2
			t1			t1
		f (Hz)			f (Hz)
		GV			GV				The curve coefficient is fixed,
	U-shape ramps
									with t2 = 0.5 x t1
									with t1 = set ramp time.
		0			0			t
				t2	t		t2
			t1			t1
dCF	DecRAmpCoeff			1 to 10						4

Deceleration ramp time reduction coefficient when the fast stop function is active.

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