Danfoss VLT FCD 330 Design Guide

VLT
®
FCD Series
Description of choice:
If the factory setting is not adequate, load compen-
sation must be set to enable the motor to start at the
given load.
W
arning: Should be set to 0% in
c
onnection with synchronous and parallel-
coupled motors and in the case of quick
load changes. Too high load compensation may lead
to instability.
135
135 U/f-ratio
(U/F RATIO)
Value:
0.00 - 20.00 V/Hz
✭ Depends on unit
Function:
This parameter enables a shift in the ratio between
output voltage (U) and output frequency (f) linearly ,
so as to ensure correct energizing of the motor and
thus optimum dynamics, accuracy and efficiency.
The U/f-ratio only affects the voltage characteristic if
a selection has been made of
Constant torque [1]
parameter 101 Torque characteristic.
Description of choice:
The U/f-ratio is only to be changed if it is not possi-
ble to set the correct motor data in parameter
102-109. The value programmed in the factory set-
tings is based on idle operation.
136
136 Slip compensation
(SLIP COMP.)
Value:
-500 - +500% of rated slip compensation
✭ 100%
Function:
Slip compensation is calculated automatically, on the
basis of such data as the rated motor speed n
M,N
.In
this parameter, the slip compensation can be fine-
tuned, thereby compensating for tolerances on the
value for n
M,N
. Slip compensation is only active if a
selection has been made of Speedregulation, open
loop [0] in parameter 100 Configuration and Constant
torque [1] in parameter 101 Torque characteristic.
Description of choice:
Key in a % value.
137
137 DC hold voltage
(DC HOLD VOLTAGE)
Value:
0 - 100% of max. DC hold voltage
✭ 0%
Function:
This parameter is used to keep the motor (holding
torque) at start/stop.
Description of choice:
This parameter can only be used if a selection has
been made of DC hold in parameter 121 Start
function or 122 Function at stop. To be set as a per-
centage value of the max. DC hold voltage, which
depends on the choice of motor.
138
138 Brake cut out value
(BRAKE CUT OUT)
Value:
0.5 - 132.0/1000.0 Hz
✭ 3.0 Hz
Function:
Here you can select the frequency at which the ex-
ternal brake is released, via the output defined in
parameter 323 Relay output 1-3 or 341 Digital output,
terminal 46 (optionally also terminal 122 and 123).
Description of choice:
Set the required frequency.
139
139 Brake cut in frequency
(BRAKE CUT IN)
Value:
0.5 - 132.0/1000.0 Hz
✭ 3.0 Hz
Function:
Here you can select the frequency at which the ex-
ternal brake is activated; this takes place via the
output defined in parameter 323 Relay output 1-3 or
341 Digital output terminal 46 (Optionally also 122
and 123).
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.04.A1.02 - VLT is a registered Danfoss trade mark
63
Programming

Danfoss VLT FCD 330 Specifications

General

Brand	Danfoss
Model	VLT FCD 330
Category	DC Drives
Language	English