Danfoss VLT 5000 Series Operating Instructions

VLT
®
5000 Series
This is used especially in applications with a cone
armature motor, where the start is to be clockwise,
followed by rotation in the reference direction.
Select Start frequency/voltage in reference direction [4]
in order to obtain the function described in parameters
130 and 131 during the start delay time. The motor
will always rotate in the reference direction.
If the reference signal equals zero (0) parameter
130 Start frequency will be ignored and the output
frequency will equal zero (0). The output voltage
will correspond to the setting of the start voltage
in parameter 131 Start voltage.
Select VVC
plus
clockwise [5]soastohaveonlythe
function described in parameter 130 Start frequency in
the start delay time. The start voltage will be calculated
automatic. Notice that this function only uses the
start frequency in the start delay time.
Regardless of the value assumed by the reference
signal, the output frequency will equal the setting
of the start frequency in parameter 130.
122 Function at stop
(FUNCTION AT STOP)
Value:
✭Coasting (COAST)
[0]
DC hold (DC-HOLD)
[1]
Motor check (MOTOR CHECK)
[2]
Pre-magnetizing (PREMAGNETIZING)
[3]
Function:
Here it is possible to select the function of the frequency
converter after a stop command or when the frequency
has been ramped down to 0 Hz. See parameter 123
with respect to activation of this parameter regardless
of whether the stop command is active.
Description of choice:
Select Coasting [0] if the frequency converter is to
’let go’ of the motor (inverter closed).
Select DC hold [1] when a DC holding current set
in parameter 124 is to be activated.
Select Motor check [2] if the frequency converter is to
check whether or not a motor has been connected.
Select Pre-magnetizing [3]. The magnetic field
is built up in the motor while it remains stopped.
This ensures that the motor can produce torque
as quickly as possible on starting.
123 Min. frequency for activating
function at stop
(MIN.F. FUNC.STOP)
Value:
0.0 - 10.0 Hz
✭ 0.0 Hz
Function:
This parameter sets the frequency at which the function
selected in parameter 122 is to be activated.
Description of choice:
Enter the desired frequency.
NB!:
If parameter 123 is set higher than parameter
130, the start delay function (parameters
120 and 121) will be skipped.
NB!:
If parameter 123 is set too high, and DC
hold has been chosen in parameter 122,
the output frequency will jump to the value
in parameter 123 without ramping up. This may
cause an overcurrent warning/alarm.
124 DC holding current
(DC-HOLD CURRENT)
Value:
✭ 50 %
Function:
This parameter is used to uphold the motor function
(holding torque) or to pre-heat the motor.
NB!:
The maximum value depends on the rated
motor current. If the DC holding current
is active, the frequency converter has a
switching frequency of 4 kHz.
Description of choice:
This parameter can only be used if DC hold [1] has
been selected in parameter 121 or 122. Set it as
a percentage value in relation to the rated motor
current I
M,N
set in parameter 105.
100% DC holding current corresponds to I
M,N.
Warning: 100 % supply for too long
may damage the motor.
✭ = factory setting. () = display text [] = value for use in communication via serial communication port
MG.51.A9.02 - VLT is a registered Danfoss trademark
110

Danfoss VLT 5000 Series Specifications

General

Brand	Danfoss
Model	VLT 5000 Series
Category	DC Drives
Language	English