Danfoss VLT 5000 Series Bedienungsanleitung

VLT



Drives and Controls

VLT





Frequency Converter

Series 5000

Wobble function

Instruction

MI.50.J1.02 - VLT is a registered Danfoss trademark *MI50J102*

MI.50.J1.02 - VLT is a registered Danfoss trademark

VLT®Series 5000 Wobble function

Introduction

■The wobble function is primarily used for synthetic

yarn winding applications. The wobble option is to be

installed in the VLT controlling the traverse drive. The

traverse drive VLT will move the yarn back and forth

in a diamond pattern across the surface of the yarn

package. To prevent a buildup of yarn at the same

points at the surface, this pattern must be altered.

The wobble option can accomplish this by continu

ously varying the traverse velocity in a programmable

cycle.

The wobble function is created by superimposing a

delta frequency around a center frequency. To com

pensate for the inertia in the system a quick fre

quency jump can be included. Especially suitable for

elastic yarn applications the option features a ran

domized wobble ratio.

Parameter description

■

100 Configuration (CONFIG. MODE )

Value:

✭Speed regulation, open loop

(SPEED OPEN LOOP) [0]

Speed regulation, closed loop

(SPEED CLOSED LOOP) [1]

Process regulation, closed loop

(PROCESS CLOSED LOOP) [3]

Torque regulation, open loop

(TORQUE OPEN LOOP) [4]

Torque regulation, speed feedback

(TORQUE CONTROL SPEED) [5]

Function:

The parameter is used for selecting the

configuration to which the VLT frequency converter is

to be adapted. This parameter is identical to

parameter 100 in the standard VLT5000 software.

Description of choice:

The wobble function can be active only by selecting

Speed, open loop mode [0]. The wobble option

parameters: 700 - 709 are not visible in the other

modes.

700 Wobble mode (WOBB MODE)

Value:

✭Wobble mode OFF (OFF) [0]

Wobble mode ON (ON) [1]

Function:

The standard speed open loop mode set in

parameter 100 is extended with a wobble function.

In this parameter it is possible to select or

deselect the wobble function. Deselecting the

wobble function makes the drive operate in the

standard speed open loop mode.

Description of choice:

Select OFF [0] to disable the wobble function. The

speed open loop mode acts as in the standard

VLT5000 software.

Select ON [1] to enable the wobble function.

Warar

arar

arning:ning:

ning:ning:

ning:

This parameter can be set while running.

MI.50.J1.02 - VLT is a registered Danfoss trademark

VLT®Series 5000 Wobble function

701 Center frequency (CENTER FREQ)

Value:

0.0 - 120.0 Hz ✭25.0Hz

Function:

The center frequency of the wobble sequence is

specified in this parameter.

Description of choice:

The center frequency is specified in Hertz. The output

frequency can not exceed the setting of parameter

200.

704 Jump time (JUMP TIME)

Value:

0 - 50 ms ✭0 ms

Function:

This parameter determines the slope of the jump

ramp at the maximum and minimum wobble

frequency.

This parameter can only be changed in stop-mode.

Description of choice:

The time is specified in milliseconds.

702 Delta frequency (DELTA FREQ)

Value:

0.0 - 20.0 Hz ✭5.0Hz

Function:

The delta frequency is determining the magnitude of

the wobble frequency. The delta frequency is

superimposed on the center frequency. Parameter

702 is selecting both the positive and negative delta

frequency. The setting of parameter 702 must thus

not be higher than the setting of parameter 701.

The initial ramp up time from standstill until the

wobble sequence is running is determined by

parameter 207.

Description of choice:

The frequency is specified in Hertz.

703 Jump frequency (JUMP FREQ)

Value:

0.0 - 25.0 Hz ✭0.0Hz

Function:

The jump frequency is used to compensate for the

inertia in the traverse system.

If a jump in the output frequency is required in the top

and in the bottom of the wobble sequence, the

frequency jump is set in this parameter.

If the traverse system has a very high inertia a high

jump frequency may create a torque limit warning or

trip (warning/alarm 12) or an over voltage warning or

trip (warning/alarm 7).

This parameter can only be changed in stop-mode.

Description of choice:

The frequency is specified in Hertz.

705 Wobble time (WOBBLE TIME)

Value:

0.0 - 1000.0 s ✭10.0 s

Function:

This parameter determines the wobble sequence

period.

This parameter can only be changed in stop-mode.

Wobble time = tup + tdown

Description of choice:

The time is entered in seconds.

706 Wobble ratio (WOBB RATIO)

Value:

0.1 - 10 ✭1

Function:

The ratio between the up time versus the down time

of the wobble sequence is specified in this parameter.

Wobble ratio = tup/tdown,

This parameter can only be changed in stop-mode.

Description of choice:

If the ratio 0.1 is selected:

tdown is 10 times greater than tup.

If the ratio10 is selected:

tup is 10 times greater than tdown.

MI.50.J1.02 - VLT is a registered Danfoss trademark

VLT®Series 5000 Wobble function

707 Random function (RANDOM FUNC)

Value:

✭OFF (OFF) [0]

ON (ON) [1]

Function:

This parameter enables a randomized wobble ratio

function. The wobble ratio in parameter 706 is not

active if the random function is enabled.

Description of choice:

Select OFF [0] to disable the random function and use

the wobble ratio set in parameter 706.

708 Random ratio max (RANDOM MAX)

Value:

0.1 - 10 ✭1

Function:

This parameter determines the maximum wobble ratio

which the random function is allowed to choose.

Description of choice:

Enter the maximum allowed wobble ratio.

709 Random ratio min (RANDOM MIN)

Value:

0.1 - 10 ✭1

Function:

This parameter determines the minimum wobble ratio

which the random function is allowed to choose.

Description of choice:

Enter the minimum allowed wobble ratio.

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material.

Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such

alterations can be made without subsequential changes being necessary in specifications already agreed.

175R0891 MI.50.J1.02

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