[3] Digital input 18
[4] Digital input 19
[5] Digital input 32
[6] Digital input 33
NB!
This parameter cannot be adjusted while the motor is running.
NB!
Digital input should be set to [0]
PNP - Active at 24V
in par. 5-00.
2-00 DC Hold/Preheat Current
Range: Function:
50 %* [Application dependant] Enter a value for holding current as a percentage of the rated motor current I
M,N
set in
par. 1-24
Motor Current
. 100% DC holding current corresponds to I
M,N
.
This parameter holds the motor (holding torque) or pre-heats the motor.
This parameter is active if [1] DC hold/Preheat is selected in par. 1-80
Function at Stop
.
NB!
The maximum value depends on the rated motor current.
Avoid 100 % current for too long. It may damage the motor.
2-10 Brake Function
Option: Function:
[0] * Off No brake resistor installed.
[1] Resistor brake Brake resistor incorporated in the system, for dissipation of surplus brake energy as heat. Connect-
ing a brake resistor allows a higher DC link voltage during braking (generating operation). The
Resistor brake function is only active in frequency converters with an integral dynamic brake.
[2] AC brake AC Brake will only work in Compressor Torque mode in par. 1-03
Torque Characteristics
.
2-17 Over-voltage Control
Option: Function:
Over-voltage control (OVC) reduces the risk of the frequency converter tripping due to an over
voltage on the DC link caused by generative power from the load.
[0] Disabled No OVC required.
[2] * Enabled Activates OVC.
NB!
The ramp time is automatically adjusted to avoid tripping of the frequency converter.
6 How to Programme the Low Harmonic Drive
VLT HVAC Low Harmonic Drive Operating In-
structions
98 MG.16.A1.02 - VLT
®
is a registered Danfoss trademark
6
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