GEA ARIETE - Mains Voltage at Mains Fault; Speed Closed Loop Gear Ratio; Dead Time Compensation; Frequency Range Monitor

VLT
®
5000 Series
Description of choice:
Set the required value.
450
450 Mains voltage at mains fault
(MAINS FAIL VOLT.)
Value:
180-240 V for 200-240 V units
✭ 180
342-500 V for 380-500 V units
✭ 342
Function:
This is where to set the voltage level at which pa-
rameter 407 Mains fault is to be activated. The
voltage level for activating the mains fault functions
must be lower than the rated mains voltage supplied
to the VLT frequency converter. As a rule of thumb,
parameter 450 can be set to 10% below the rated
mains voltage.
Description of choice:
Set the level for activating mains fault functions.
NB!:
If this value is set at too high a level, the
mains fault function set in parameter 407 can
be activated, even if the mains voltage is present.
453
453 Speed closed loop gear ratio
(SPEED GEARRATIO)
Value:
0.01 - 100.00
✭ 1.00
Function:
This parameter is only used if Speed control, closed
loop [1] has been selected in parameter 100 Config-
uration.
If the feedback has been fitted to the gearshaft, a
gear ratio must be set - otherwise the VLT frequency
converter will not be able to detect an encoder loss.
For a gear ratio of 1:10 (gearing down of motor
rpm), set the parameter value to 10.
If the encoder has been fitted directly on the motor
shaft, set the gear ratio to 1.00.
Please note, that this parameter only has influence
on the encoder loss function.
Description of choice:
Set the required value.
454
454 Dead time compensation
(DEADTIME COMP.)
Value:
Off (OFF)
[0]
✭On (ON)
[1]
Function:
The active inverter dead time compensation which is
part of the VLT 5000 control algorithm (VCC+) is
causing instability at standstill when working in
closed loop control. The purpose of this parameter
is switching off the active dead time compensation to
avoid instability.
Description of choice:
Select Off [0] to inactivate the dead time compensa-
tion.
Select On [1] to activate the dead time compensa-
tion.
455
455 Frequency range monitor
(MON. FREQ. RANGE)
Value:
Disable
[0]
✭Enable
[1]
Function:
his parameter is used if warning 35 Out of frequency
range must be turned off in the display in process
control closed loop. This parameter does not affect
the extended status word.
Description of choice:
Select Enable [1] to enable the readout in the display
if warning 35 Out of frequency range occurs. Select
Disable [0] to disable the readout in the display if
warning 35 ut of frequency range occurs.
457
457 Phase loss function
(PHASE LOSS FUNCT)
Value:
✭Trip (TRIP)
[0]
Warning (WARNING)
[1]
Function:
Select the function which is to be activated if the
mains imbalance becomes too high or if a phase is
missing.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.51.A1.02 - VLT is a registered Danfoss trade mark
155
Programming