Danfoss VLT 5000 Series Operating Instructions Manual page 147

See drawing for parameter 422.
430 F 4 frequency
(F4 FREQUENCY)
Value:
par. 428 - par. 432
Function:
This parameter sets the X-value of the 4th break point
Description of choice:
Set the frequency desired at the U4 voltage
set in parameter 429.
See drawing for parameter 422.
431 U 5 voltage
(U5 VOLTAGE)
Value:
0.0 - U
VLT, MAX
Function:
This parameter sets the Y-value of the 5th break point.
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.
= factory setting. () = display text [] = value for use in communication via serial communication port
146
Factory setting of par. 104
Factory setting of par. 103
Factory setting of par. 104
®
VLT 5000 Series
433 Torque control, open loop proportional gain
(TOR-OL PROP. GAIN)
Value:
0 (Off) - 500%
Function:
The proportional gain indicates how many times
the error (the deviation between feedback signal
and set point) is to be applied.
Used together with Torque control, open
loop (parameter 100).
Description of choice:
Fast control is obtained with a high gain, but if the gain
is too high, the process may become unstable.
434 Torque control, open loop Integration time
(TOR-OL INT.TIME)
Value:
0.002 - 2.000 sec.
Function:
The integrator provides an increasing gain if there
is a constant error between reference and current
measuring signal. The greater the error, the
quicker the gain increases. The integral time is
the time required by the integrator to reach the
same gain as the proportional gain.
Used together with Torque control, open
loop (parameter 100).
Description of choice:
Fast control is obtained if the integral time is short.
However, this time may become too short, in which
case the process may become unstable.
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).
MG.51.A9.02 - VLT is a registered Danfoss trademark
100%
0.02 sec.
[0]
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