Danfoss VLT 3000 Series, Product Manual

Page: 93 / 156

93 MG.30.A7.02 - VLT ® is a registered Danfoss trademark
Parameter description 1.. Load and motor
117
Display unit
(Display unit)
Value:
✭
% (standard) [0]
°
C [1]
PPM [2]
Pa [3]
bar [4]
rpm [5]
l/s. [6]
m
3
/s. [7]
l/min [8]
m
3
/min. [9]
l/h [10]
m
3
/h [11]
kg/s. [12]
kg/min. [13]
kg/h [14]
T/h [15]
m [16]
Nm [17]
m/s. [18]
m/min. [19]
[20]
° F [21]
PPM [22]
In HG [23]
bar [24]
RPM [25]
gal/s. [26]
ft
3
/s. [27]
gal/min. [28]
ft 3 /min. [29]
gal/h [30]
ft
3
/h [31]
LB/s. [32]
LB/min. [33]
LB/h [34]
t/min. [35]
FT [36]
LP FT [37]
FT/s. [38]
FT/min. [39]
120
Controller range
(Contrl range)
Value:
0 - 100%
✭
100%
The controller range (band width) limits
the output from the PID controller as a per-
centage of f
MAX
. This indicates the maxi-
mum deviation from the start frequency.
121
Proportional gain
(Proprt / L gain)
Value:
OFF - 10.00
✭
0.01
Fast control is obtained when the value is
high. The value can be too high, and then
the process may become unstable.
122
Integral time
(Integral time)
Value:
0.01 - 9999 sec. (OFF)
✭
(OFF)
Fast control is obtained when the integral
time is short.
The value can be too short, and then the
process may become unstable.
9999 = OFF. Means that the integration
function is inactive.
123
Differentiation time
(Differntl time)
Value:
OFF - 10.00 sec.
✭
(OFF)
Fast control is obtained when the
differentiation time is short.
The value can be too short, and then the
process may become unstable.
When the differentiation time is 0 sec., the
D-function is not active.
124
Low pass filter
(Lowpass filter)
Value:
0.0 - 10.00 sec.
✭
0.0
The feedback signal is dampened with a
low pass filter with a time constant (
τ
) of
0-10 sec. 0 sec. = non-activated.
125
Feedback factor
(Feedback factor)
Value:
0 - 500%
✭
100%
Used to adapt a non-optimal feedback sig-
nal.
Choose between a various number of unit
read-outs to be displayed together with the
feedback display value. Display scaling is
made in parameters 115, 116 and 005.
✮
= Factory setting. Text in ( ) = Display text.
The figures in [ ] are used in bus communication.
Value:
0 - 500%
✭
100%
The feed forward function determines the
start frequency proportional to the set point.
119
FF factor
(Feed fwd factor)