Danfoss VLT 2800 Design Manual page 100

Programming
425 U2 voltage
Value:
0.0 - 999.0 V
Function:
See parameter 423 U1 voltage.
Description of choice:
Set the output voltage (U2) that is to match the second
4 4
output frequency (F2), parameter 426 F2 frequency.
426 F2 frequency
Value:
Parameter 424 F1 frequency -
parameter 428 F3 frequency
Function:
See parameter 423 U1 voltage.
Description of choice:
Set the output frequency (F2) that is to match the second
output voltage (U2), parameter 425 U2 voltage.
427 U3 voltage
Value:
0.0 - 999.0 V
Function:
See parameter 423 U1 voltage.
Description of choice:
Set the output voltage (U3) that is to match the third
output frequency (F3), parameter 428 F3 frequency.
428 F3 frequency
Value:
Parameter 426 F2 frequency -
1000 Hz
Function:
See parameter 423 U1 voltage.
Description of choice:
Set the output frequency (F3) that is to match the third
output voltage (U3), parameter 427 U3 voltage.
NOTICE
Parameters 437-444 are only used if [3] Process
regulation, closed loop has been selected in parameter
100 Configuration.
437 Process PID normal/inverse control
Value:
Normal (normal)
Inverse (inverse)
Function:
Select whether the process regulator is to increase/
decrease the output frequency if there is a deviation
between the reference/setpoint and the actual process
mode.
98
Design Guide
If the adjustable frequency drive is to reduce the output
frequency in case the feedback signal increases, select [0]
parameter 103
Normal. If the adjustable frequency drive is to increase the
output frequency in case the feedback signal increases,
select [1] Inverse.
Parameter 104
Select whether the process regulator is to continue
Motor frequency
regulating on a deviation, even if it is not possible to
increase/decrease the output frequency.
The factory setting is [1] Enable, which means that the
integration link is initialised in relation to the actual output
frequency if either the current limit, the voltage limit or
the maximum/minimum frequency has been reached. The
process regulator does not engage again until either the
error is 0, or its sign has changed. Select [0] Disable if the
parameter 103
integrator is to continue integrating on the deviation, even
if it is not possible to remove the fault by such control.
NOTICE
If [0] Disable is selected, it means that when the
deviation changes its sign, the integrator has to
integrate down from the level obtained as a result of the
former error, before any change in output frequency
occurs.
Parameter 104 Motor
frequency
When the start signal comes, the frequency converter
reacts in the form of Open loop and does not change to
Closed loop until the programmed start frequency is
reached. This allows for setting a frequency that
corresponds to the speed at which the process normally
runs, which enables the required process conditions to be
reached sooner.
Set the required start frequency.
[0]
[1]
Danfoss A/S © Rev. May/2014 All rights reserved.
Description of choice:
438 Proces PID anti windup
Value:
Not active (DISABLE)
Active (ENABLE)
Function:
Description of choice:
439 Process PID start frequency
Value:
f - f (parameter
MIN MAX
201/202)
Function:
Description of choice:
[0]
[1]
Parameter 201 Output
frequency, low limit, f
MIN
MG27E402