Danfoss AKD 5001 Manual page 92

Description of choice:
Set the voltage desired at the F5 frequency
set in parameter 432.
432 F 5 frequency
(F5 FREQUENCY)
Value:
par. 430 - 1000 Hz
Function:
This parameter sets the X-value of the 5th break point.
This parameter is not limited by parameter 200.
Description of choice:
Set the frequency desired at the U5 voltage
set in parameter 431.
See drawing for parameter 422.
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. This is
done by having a difference between the reference
signal and the feedback signal.
Used together with Process control, closed
loop (parameter 100).
Description of choice:
If the frequency converter is to reduce the
output frequency in case the feedback signal
increases, select Normal [0].
If the frequency converter is to increase the
output frequency in case the feedback signal
increases, select Inverse [1].
438 Process PID anti windup
(PROC ANTI WINDUP)
Value:
Off (DISABLE)
On (ENABLE)
Function:
It is possible to select whether the process regulator
is to continue regulating on an error even if it is not
possible to increase/reduce the output frequency.
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.50.R3.02 -
Factory setting of par. 104
[0]
[1]
[0]
[1]
AKD 5000
Used together with Process control, closed
loop (parameter 100).
Description of choice:
The factory setting is Enable [1], which means that
the integration link is adjusted in relation to the
actual output frequency if either the current 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 an error, even if it is not possible
to remove the fault by such control.
NB!:
If Disable [0] is selected, it will mean that when
the error 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 to the output frequency occurs.
439 Process PID start frequency
(PROC START VALUE)
Value:
f -f
MIN MAX
(parameter 201 and 202)
Function:
When the start signal comes, the frequency converter
will react in the form of Speed control, open loop
following the ramp. Only when the programmed start
frequency has been obtained, will it change over to
Process control, closed loop. In addition, it is possible
to set a frequency that corresponds to the speed at
which the process normally runs, which will enable the
required process conditions to be reached sooner.
Used together with Process control, closed
loop (parameter 100).
Description of choice:
Set the required start frequency.
NB!:
If the frequency converter is running at the
current limit before the desired start frequency
is obtained, the process regulator will not be
activated. For the regulator to be activated anyway, the
start frequency must be lowered to the required output
frequency. This can be done during operation.
parameter 201
91