Danfoss VLT FC 102 Operating Instructions Manual page 98

6 How to Programme the Low Harmonic Drive
[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]
2-00 DC Hold/Preheat Current
6
Range:
50 %* [Application dependant]
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:
[0] * Off
[1] Resistor brake
[2] AC brake
2-17 Over-voltage Control
Option:
[0] Disabled
[2] * Enabled
NB!
The ramp time is automatically adjusted to avoid tripping of the frequency converter.
98
PNP - Active at 24V in par. 5-00.
Function:
Enter a value for holding current as a percentage of the rated motor current I
Motor Current . 100% DC holding current corresponds to I
par. 1-24
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:
No brake resistor installed.
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.
AC Brake will only work in Compressor Torque mode in par. 1-03
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.
No OVC required.
Activates OVC.
®
MG.16.A1.02 - VLT is a registered Danfoss trademark
VLT HVAC Low Harmonic Drive Operating In-
.
M,N
Function at Stop .
Torque Characteristics .
structions
set in
M,N