Danfoss VLT 5000 Series Instruction Manual page 101

129 External motor fan
(MOTOR EXTERN FAN)
Value:
No (NO)
Yes (YES)
Function:
This parameter informs the frequency converter
whether the motor has an external separately supplied
fan (external ventilation), indicating that derating at low
speed is unnecessary.
Description of choice:
If Yes [1] is selected, the graph below is followed if the
motor frequency is lower. If the motor frequency is
higher, the time will still derate as if no fan had been
installed.
= factory setting, () = display text, [] = value for use in communication via serial communication port
98
®
VLT
130 Start frequency (START FREQUENCY)
Value:
0.0 - 10.0 Hz
Function:
This parameter allows setting of the output frequency
at which the motor is to start.
The output frequency 'leaps' to the set value. This pa-
rameter can be used e.g. for hoist applications (cone
rotor motors).
Description of choice:
Set the desired start frequency.
It is assumed that the start function in parameter 121
has been set to [3] or [4] and that a start delay time has
been set in parameter 120; also, a reference signal
must be present.
[0]
[1]
NOTE
If parameter 123 is set higher than param-
eter 130, the start delay function (param-
eters 120 and 121) will be skipped.
131 Initial voltage (INITIAL VOLTAGE)
Value:
0.0 - parameter 103
Function:
Some motors, such as cone rotor motors, need extra
voltage/starting frequency (boost) when starting, so as
to disengage the mechanical brake.
For this purpose use parameters 130/131.
Description of choice:
Set the desired value required to disengage the me-
chanical brake.
It is assumed that the start function in parameter 121
has been set to [3] or [4] and that a start delay time has
been set in parameter 120; also, a reference signal
must be present.
145 Minimum DC brake time
(DC BRK MIN. TIME)
Value:
0 - 10 sec.
MG.51.C5.22 - VLT
5000 Series
is a registered Danfoss trademark.
0.0 Hz
0.0 Volt
0 sec.