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Description of choice:
If a time constant (
IJ
) e.g. of 100 ms is programmed,
the cut-off frequency for the lowpass filter will be 1/0.1
= 10 RAD/sec., corresponding to (10/2 x
ʌ
) = 1.6 Hz.
This means that the PID regulator will only regulate a
feedback signal that varies by a frequency of less than
1.6 Hz. If the feedback signal varies by a higher fre-
quency than 1.6 Hz, the PID regulator will not react.
422
U 0 voltage at 0 Hz
(U0 VOLTAGE (0HZ))
Value:
0.0 - parameter 103
20.0 volt
Function:
Parameters 422-432 can be used together with Spe-
cial motor characteristics (par. 101). It is possible to
make a U/f characteristic on the basis of six definable
voltages and frequencies. Change of motor nameplate
data (parameter 102 - 106) affects parameter 422.
Description of choice:
Set the desired voltage at 0 Hz.
See the below drawing.
423
U 1 voltage
(U1 VOLTAGE)
Value:
0.0 - U
VLT,MAX
Factory setting of par. 103
Function:
This parameter sets the Y-value of the 1st break point.
Description of choice:
Set the voltage desired at the F1 frequency set in pa-
rameter 424.
See drawing for parameter 422.
424
F 1 frequency
(F1 FREQUENCY)
Value:
0.0 - par. 426
Factory setting of par. 104
Function:
This parameter sets the X-value of the 1st break point.
Description of choice:
Set the frequency desired at the U1 voltage set in pa-
rameter 423.
See drawing for parameter 422.
425
U 2 voltage
(U2 VOLTAGE)
Value:
0.0 - U
VLT, MAX
Factory setting of par. 103
Function:
This parameter sets the Y-value of the 2nd break point.
Description of choice:
Set the voltage desired at the F2 frequency set in pa-
rameter 426.
See drawing for parameter 422.
426
F 2 frequency
(F2 FREQUENCY)
Value:
par. 424 - par. 428
Factory setting of par. 104
Function:
This parameter sets the X-value of the 2nd break point.
Description of choice:
Set the frequency desired at the U2 voltage set in pa-
rameter 425.
See drawing for parameter 422.
427
U 3 voltage
(U3 VOLTAGE)
Value:
0.0 - U
VLT,MAX
Factory setting of par. 103
VLT
®
5000 Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
MG.51.C5.22 - VLT
p
is a registered Danfoss trademark.
133
Progra
mming
Summary of Contents for VLT 5000 Series
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Page 186: ...VLT 5000 Series MG 51 C5 22 VLT p is a registered Danfoss trademark 183 EC EMC ...
Page 197: ...EXTERNAL PRESET VLT 5000 Series 194 MG 51 C5 22 VLT p is a registered Danfoss trademark ...
Page 202: ...VLT 5000 Series MG 51 C5 22 VLT p is a registered Danfoss trademark 199 List of functions ...
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