Danfoss VLT 5000 FLUX, Руководство по эксплуатации, Страница: 72 / 158

VLT
®
5000 FLUX
119 High starting torque
(HIGH START TORQ.)
Value:
0.0 - 0.5 sec.
✭
0.0 sec.
Function:
This function is active together with Speed Control
Closed Loop (parameter 100). In order to obtain
a high starting torque, approx. 2 x I
VLT,N
for max.
0.5 sec. However, the current is limited by the
protection limit of the frequency converter.
Description of choice:
Set the high starting torque time.
120 Start delay (START DELAY)
Value:
0.0 - 10.0 sec. ✭
0.0 sec.
Function:
This parameter enables a delay of the starting time.
The frequency converter begins with the start
function selected in parameter 121.
Description of choice:
Set the start delay time until acceleration is to begin.
When Mechanical Brake Release [6] has been chosen
in Parameter 121, a minimum time is calculated based
on motor data and the time set in Parameter 164.
121 Start function (START FUNCTION)
Value:
DC hold in start delay time
(DC HOLD/DELAY TIME)
[0]
DC brake in start delay time
(DC BRAKE/DELAY TIME) [1]
Coasting in start delay time
(COAST/DELAY TIME) [2]
Start speed/current clockwise.
(CLOCKWISE OPERATION)
[3]
Start speed/current in reference direction
(HORIZONTAL OPERATION) [4]
✭
Start speed clockwise
(START SPEED CLOCKW) [5]
Mechanical Brake Release (MECH BRAKE RELEASE) [6]
Function:
Selecting the start function during start delay
when (parameter 120) is selected.
Description of choice:
Select DC hold in the start delay time [0] to energize
the motor with a DC holding current (parameter
124) in the start delay time.
Select DC brake in the start delay time [1] to
energize the motor with a DC braking current
(parameter 125) during start delay time.
Select Coasting in the start delay time [2] and the
motor will not be controlled by the frequency converter
during the start delay time (inverter off).
Select Start speed/current clockwise [3] to connect
the function described in parameter 130 and
131 in the start delay time.
Regardless of the value applied by the reference signal,
the output speed will apply the setting of the start speed
in parameter 130 and the output current will correspond
to the setting of the start current in parameter 131.
Select Start speed/current in reference direction [4] in
order to obtain the function described in parameter
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 speed will be ignored and the output
speed will equal zero (0). The output current will
correspond to the setting of the start current in
parameter 131 Start current .
Select Start/speed clockwise [5] to have only
the function described in parameter 130 Start
speed in the start delay time. The start current
will automatically be calculated.
Notice:This function only uses the start speed
in the start delay time.
Regardless of the value set by the reference
signal, the output speed will equal the setting of
the start speed in parameter 130.
Mechanical Brake Release is typically used in Crane,
Lift and other hoisting applications. Mechanical Brake
Release can be used both in closed and open loop.
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]
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.55.A6.02 - VLT is a registered Danfoss trademark
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