Danfoss VLT HVAC Drive Instruction Manual page 81

VLT ® HVAC Drive Instruction Manual
1-93
Value:
None
Analog input 53
Analog input 54
Digital input 18
Digital input 19
Digital input 32
Digital input 33
Function:
Select the input to which the thermistor (PTC
sensor) should be connected. An analog input
option [1] or [2] cannot be selected if the an-
alog input is already in use as a reference
source (selected in par. 3-15
Source
Reference Source 3).
This parameter cannot be adjusted while the
motor is running.
2-00
Value:
0 - 100%
Function:
Enter a value for holding current as a percent-
age of the rated motor current I
Thermistor Source
Reference
Reference Source
1, 3-16 2 or 3-17
DC Hold Current/Preheat
Current
set in par.
M,N
MG.11.A4.22 - VLT ® is a registered Danfoss trademark
6. How to program the adjustable frequency
1-24 Motor Current. 100 % DC holding current
corresponds to I
M,N
This parameter holds the motor function
(holding torque) or pre-heats the motor.
This parameter is active if
[0]
Function at Stop
in par. 1-80
[1]
[2]
NOTE
[3]
The maximum value depends on
the rated motor current.
[4]
NOTE
[5]
Avoid 100% current for too
[6]
long, as it may damage the mo-
tor.
2-10 Brake Function
Value:
Off
Resistor brake
Function:
Off
Select [0] if no brake resistor is installed.
Resistor brake
Select
incorporated in the system, for dissipation of
surplus brake energy as heat. Connecting a
brake resistor allows a higher DC link voltage
during braking (generating operation). The
resistor brake function is only active in adjust-
50 %
able frequency drives with an integral dynam-
ic brake.
drive
.
DC hold
is selected
.
[0]
[1]
[1] if a brake resistor is
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