119
High start torque
(High start torq.)
Value:
0.0 - 0.5 sec.
0.0 sec.
Function:
To ensure a high start torque approx. 1.8 x I
INV.
can be
permitted for max. 0.5 sec. The current is, however,
limited by the frequency converter's (inverter's) safety
limit. 0 sec. corresponds to no high start torque.
Description of choice:
Set the necessary time for which a high start torque is
required.
120
Start delay
(START DELAY)
Value:
0.0 - 10.0 sec.
0.0 sec.
Function:
This parameter enables a delay of the start-up time
after the conditions for start have been fulfilled. When
the time has passed, the output frequency will start by
ramping up to the reference.
Description of choice:
Set the necessary time before commencing to accel-
erate.
121
Start function
(START FUNCTION)
Value:
DC hold during start delay time
(DC HOLD/DELAY TIME)
[0]
DC brake during start delay time
(DC BRAKE/DELAY TIME)
[1]
Coasting during start delay time
(COAST/DELAY TIME)
[2]
Start frequency/voltage clockwise
(CLOCKWISE OPERATION)
[3]
Start frequency/voltage in reference direction
(VERTICAL OPERATION)
[4]
Function:
This is where to choose the required mode during the
start delay time (parameter 120
Start delay time
).
Description of choice:
Select
DC hold during start delay time
[0] to energize
the motor with a DC hold voltage during the start delay
time. Set voltage in parameter 137
DC hold voltage
.
Choose
DC brake during start delay time
[1] to energize
the motor with a DC brake voltage during the start de-
lay time. Set voltage in parameter 132
DC brake volt-
age
.
Choose
Coasting during start delay time
[2] and the
motor will not be controlled by the frequency converter
during the start delay time (inverter turned off).
Choose
Start frequency/voltage clockwise
[3] to obtain
the function described in parameter 130
Start frequen-
cy
and 131
Voltage at start
during start delay time.
Regardless of the value assumed by the reference
signal, the output frequency equals the setting in pa-
rameter 130
Start frequency
and the output voltage will
correspond to the setting in parameter 131
Voltage at
start
.
This functionality is typically used in hoist applications.
It is used in particular in applications in which a cone
anchor motor is applied, where the direction of rotation
is to start clockwise followed by the reference direc-
tion.
Select
Start frequency/voltage in reference direction
[4]
to obtain the function described in parameter 130
Start
frequency
and 131
Voltage at start
during the start de-
lay time.
The direction of rotation of the motor will always follow
in the reference direction. If the reference signal
equals zero, the output frequency will equal 0 Hz, while
the output voltage will correspond to the setting in pa-
rameter 131
Voltage at start
. If the reference signal is
different from zero, the output frequency will equal pa-
rameter 130
Start frequency
and the output voltage will
equal parameter 131
Voltage at start
. This functionality
is used typically for hoist applications with counter-
weight. It is used in particular for applications in which
a cone anchor motor is applied. The cone anchor mo-
tor can break away using parameter 130
Start frequen-
cy
and parameter 131
Voltage at start
.
122
Function at stop
(FUNCTION AT STOP)
Value:
Coasting (COAST)
[0]
DC hold (DC HOLD)
[1]
= factory setting, () = display text, [] = value for use in communication via serial communication port
MG.27.E2.02 - VLT is a registered Danfoss trademark
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