Function:
This parameter sets the frequency at which the func-
tion selected in parameter 122 is to be activated.
Description of choice:
Enter the desired frequency.
NOTE
If parameter 123 is set higher than param-
eter 130, the start delay function (param-
eters 120 and 121) will be skipped.
NOTE
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 parameter 123 without ramping up. This
may cause an overcurrent warning/alarm.
124
DC holding current
(DC-HOLD CURRENT)
Value:
(
OFF
)
ì
I
VLT, N
I
M , N
× 100 %
50 %
Function:
This parameter is used to uphold the motor function
(holding torque) or to pre-heat the motor.
NOTE
The maximum value depends on the rated
motor current. If the DC holding current is
active, the adjustable frequency drive has
a switching frequency of 4 kHz.
Description of choice:
This parameter can only be used if
DC hold
[1] has
been selected in parameter 121 or 122. Set it as a
percentage value in relation to the rated motor current
I
M,N
set in parameter 105.
100% DC holding current corresponds to I
M,N.
Warning: 100% supply for too long may
damage the motor.
VLT 5122-5552, 380-500 V and VLT 5042-5602,
525-690 V work with a reduced DC current rated as
80% of I
VLT,N
at 110% overload.
125
DC braking current
(DC BRAKE CURRENT)
Value:
0 (
OFF
)
ì
I
VLT, N
I
M , N
× 100 %
50 %
Function:
This parameter is used for setting the DC brake current
that is activated upon a stop when the DC brake fre-
quency set in parameter 127 has been reached, or if
the DC brake inverse is active via digital terminal 27 or
via a serial communication port. The DC braking cur-
rent will be active for the duration of the DC braking
time set in parameter 126.
NOTE
The maximum value depends on the rated
motor current. If the DC braking current is
active, the adjustable frequency drive has
a switching frequency of 4.5 kHz.
Description of choice:
To be set as a percentage value of the rated motor
current I
M,N
set in parameter 105.
100% DC braking current corresponds to I
M,N
.
Warning: 100% supply for too long may
damage the motor.
VLT 5122-5552, 380-500 V and VLT 5042-5602,
525-690 V work with a reduced DC current rated as
80% of I
VLT,N
at 110% overload.
126
DC braking time
(DC BRAKING TIME)
Value:
0.0 (OFF) - 60.0 sec.
10.0 sec.
VLT
®
5000 Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
96
MG.51.C5.22 - VLT
p
is a registered Danfoss trademark.
Summary of Contents for VLT 5000 Series
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Page 202: ...VLT 5000 Series MG 51 C5 22 VLT p is a registered Danfoss trademark 199 List of functions ...
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