Danfoss VT2800 Series User Manual

VLT
®
2800 Series
Programming
123 Min. frequency for activation of
function at stop
(MIN.F.FUNC.STOP)
Value:
0,1 - 10 Hz
✭ 0,1 Hz
Function:
In this parameter, the output frequency is set at
which t he function selected in parameter 122
Function at stop is to be act ivated.
Description of choice:
Set the required output frequency.
NB!:
If parameter 123 is set higher than parameter
130, then the start delay function (parameter
120 and 121) will be skipped.
NB!:
If parameter 123 is set too high, and DC
hold has been chosen in parameter 122,
the output frequency will jump to the value
in parame ter 123 without ramping up. This ma y
cause an overcurrent warning / alarm.
■ DC Braking
During DC braking DC voltage is supplied to the
motor, and this w ill cause the shaft to be b rought to
a standstill. In parameter 132 DC brake voltage DC
brake voltage ca n b e preset from 0-100%. Max. DC
brake voltage depends on the motor data selected.
In parameter 126 DC braking time DC braking time
is determined a n d in parameter 127 DC brake cut-in
frequency the frequency at w hich DC braking becomes
active is selected. If a digital input is programmed to DC
braking inverse [5] and shifts from logic ’1 ’ to logic ’0’,
DC braking will be activated. When a stop command
becomes active, DC braking is activated when the
output frequency is less than the brake cut-in frequency.
NB!:
DC braking may not be used if the inertia in
the motor shaft is more than 20 time s greater
than the motor’s internal inertia.
126 DC brake time
(DC BRAKING TIME)
Value:
0-60sec.
✭ 10 sec
Function:
In this parameter, the DC brake time is set at which
parameter 132 DC brake voltage is to be active.
Description of choice:
Set the required time.
127 DC brake cut-in frequency
(DC BRAKE CUT-IN)
Value:
0.0 (OFF) - par. 202
Output frequency high limit, f
MAX
✭ OFF
Function:
In this parameter, the DC brake cut-in frequency
is set at which the DC brake is to be activated
in connection w ith a stop command.
Description of choice:
Set the required frequency.
128 Thermal motor protection
(MOT.THERM PROTEC)
Value:
✭No protection (NO PROTECTION)
[0]
Thermistor warning
(THERMISTOR WARN)
[1]
Thermistor trip (THERMISTOR TRIP)
[2]
ETR warning 1 ( ETR WARNING 1)
[3]
ETR trip 1 ( ETR TRIP 1)
[4]
ETR warning 2 ( ETR WARNING 2)
[5]
ETR trip 2 ( ETR TRIP 2)
[6]
ETR warning 3 ( ETR WARNING 3)
[7]
ETR trip 3 ( ETR TRIP 3)
[8]
ETR warning 4 ( ETR WARNING 4)
[9]
ETR trip 4 ( ETR TRIP 4)
[10]
Function:
The frequency conve rter can monitor the motor
temperature in two different wa ys:
- Via a PTC thermistor that is mounted on the motor.
The thermistor is connected betw een terminal 50
(+10V) and one of the digital input terminals 18, 19,
27 or 29. See parameter 300 Digital inputs.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.28.E9.02 - VLT is a registered Danfoss trademark
73

Danfoss VT2800 Series Specifications

General

Brand	Danfoss
Model	VT2800 Series
Category	Controller
Language	English