92
MG.30.A7.02 - VLT
®
is a registered Danfoss trademark
Parameter description
1.. Load and motor
110
Start compensation
(Start comp.)
Value:
0.00 - 99 V/A
The output voltage is regulated as a
function of the load.
If the value is set too high, the VLT
®
frequency converter can cut out due to
excess current.
✮
= Factory setting. Text in ( ) = Display text.
The figures in [ ] are used in bus communication.
111
U/f ratio
(U/f ratio)
Value:
0.00 - 20 V/Hz
The output voltage can be adjusted to the
motor on a linear basis from 0 to rated
frequency (para. 105).
The setting must only be changed if it is
not possible to record correct motor data
in parameters 104 and 105.
112
Slip compensation
(Slip comp)
Value:
0.0 - 20%
The output frequency is changed as a
function of the load.
This makes the motor
speed less load-dependent.
Description of choices:
Para. 112 = x 100%
Example:
4 pole motor
➜
N
synchron
= 1500 rev./min.
N
nominal
=1420 rev.
➜
N
slip
=80 rev./min.
Para. 112 = x 100 = 5,33 %
If the set value is too high, the number of
revolutions is increased with the load.
Entered as a percentage of rated motor
frequency (parameter 105).
113
Negative
slip compensation
(Neg slip comp)
Value:
0.0 - 20%
114
Feedback type
(Feedback type)
Parameters 115 and 116 are used to scale
the display wich can be given proportional
to a transmitter signal.
If, for example, a transmitter has a range of
6 to 10 bar, you can enter 6 in parameter
115 and 10 in parameter 116.
The value will be read out if "Display/
feedback" is selected in DISPLAY MODE.
If the load is regenerating the frequency
will be decreased at increasing
regenerating load.
The value might be different from that in
parameter 112.
Parameter 100 must be set to 4 quadratic
with slip compensation [8].
Value:
✭
0 - 9999
✭
0
115
Display value
at min. feedback
(Dis VLU@min FB)
N
synchron
N
slip
1500
80
Value:
0 - 9999
✭
100
116
Display value
at max. feedback
(Dis VLU@max FB)
Value:
Voltage (voltage)
[0]
✭
Current (current)
[1]
Pulses (pulses)
[2]
When using the PID controller one of the
inputs on terminal 17, 53 or 60 must be
used for the feedback signal.
Naturally these choices block the same
type as reference signal.
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