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426 F2 frequency
(F2 FREQUENCY)
Value:
Par. 424 F1 frequency - par. 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
(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
(F3 FREQUENCY)
Value:
Par. 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 .
NOTE
Parameters 437-444 are only used
if in parameter 100 Configuration a
selection has been made of Process
regulation, closed loop. [3].
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.90.F2.22 - VLT is a registered Danfoss trademark
Par. 104 Motor frequency
par. 103
Par. 104 Motor frequency
Decentral Solutions
437 Process PID normal/inverse control
(PROC NO/INV CTRL)
Value:
Normal (NORMAL)
Inverse (INVERSE)
Function:
It is possible to choose whether the process regulator
is to increase/reduce the output frequency if there
is a deviation between the reference/setpoint
and the actual process mode.
Description of choice:
If the variable frequency drive is to reduce
the output frequency in case the feed-
back signal increases, select Normal [0].
If the variable frequency drive is to increase the
output frequency in case the feedback signal
increases, select Inverse [1].
438 Proces PID anti windup
(PROC ANTI WINDUP)
Value:
Not active (DISABLE)
Active (ENABLE)
Function:
It is possible to select whether the process regulator is
to continue regulating on a deviation even if it is not
possible to increase/reduce the output frequency.
Description of choice:
The factory setting is Enable [1], which means that
the integration link is initialized in relation to the
actual output frequency if either the current limit, the
voltage limit or the max./min. frequency has been
reached. The process regulator will not engage again
until either the error is zero or its sign has changed.
Select Disable [0] if the integrator is to continue
integrating on the deviation, even if it is not possible
to remove the fault by such control.
NOTE
If Disable [0] is selected, it will mean that when
the deviation changes its sign, the integrator
will first have to integrate down from the level
obtained as a result of the former error, before any
change in output frequency occurs.
[0]
[1]
[0]
[1]
145
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