Vacon NX Series Applications Manual page 262

VACON · 262
377 AI1 SIGNAL SELECTION * 234567 (2.2.8, 2.2.3, 2.2.15, 2.2.2.1)
Use this parameter to connect the AI signal to the analogue input of your choice.
For more information about the TTF programming method, see Chapter 9.9 "Terminal to
function" (TTF) programming principle.
384 AI1 JOYSTICK HYSTERESIS 6 (2.2.2.8)
Use this parameter to set the joystick hysteresis.
This parameter defines the joystick hysteresis between 0 and 20 %.
When the joystick or potentiometer control is turned from reverse to forward, the output
frequency falls linearly to the selected minimum frequency (joystick/ potentiometer in
middle position) and stays there until the joystick/potentiometer is turned towards the
forward command. It depends on the amount of joystick hysteresis defined with this
parameter, how much the joystick/potentiometer must be turned to start the increase of the
frequency towards the selected maximum frequency.
If the value of this parameter is 0, the frequency starts to increase linearly immediately when
the joystick/potentiometer is turned towards the forward command from the middle position.
When the control is changed from forward to reverse, the frequency follows the same
pattern the other way round.
Reference
scaling max
ID304 = 70 Hz
f
max
= 50 Hz
f
min
Ref. scaling min
ID303 = 0 Hz
Fig. 58: An example of joystick hysteresis. In this example, the value of parameter ID385 (Sleep
limit) = 0
385 AI1 SLEEP LIMIT 6 (2.2.2.9)
Use this parameter to set the sleep limit. The AC drive stops automatically if the AI signal
level falls below the value set with this parameter.
See also parameter ID386 and Fig. 59.
9
Frequency reference
Hz
REVERSE
50%
A
ID102
ID101 =
Par. ID321
Joystick hysteresis,
= 20%
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FORWARD
50%
B
From reverse to forward
From forward to reverse
AI (V/mA)
(0-10V/20mA)
Par. ID322
= 90%
ID384 = 20%
PARAMETER DESCRIPTIONS