Page 74/169 AFNZPxxx – DUALACE2 NEW GENERATION – User Manual
8.2.2 Valve output
This parameter defines the behavior of output EVP A25
NONE = Output A25 is not enabled.
DIGITAL = Output A25 manages an on/off valve
ANALOG = Output A25 manages a PWM-modulated
current-controlled proportional valve.
This parameter defines the resistance of the coil
connected to EVP output (A25).
It is expressed in Ohm
0% ÷ 100%
(steps of 1/255)
This parameter determines the minimum current applied to
the EVP when the potentiometer position is at the
minimum. This parameter is not effective if the EVP is
programmed like an on/off valve.
0% ÷ 100%
(steps of 1/255)
This parameter determines the maximum current applied
to the EVP when the potentiometer position is at the
maximum. This parameter also determines the current
value when the EVP is programmed like an ON/OFF valve.
0 s ÷ 12.75 s
(steps of 0.05 s)
It determines the current increase rate on EVP. The
parameter sets the time needed to increase the current to
the maximum possible value.
0 s ÷ 12.75 s
(steps of 0.05 s)
It determines the current decrease rate on EVP. The
parameter sets the time needed to decrease the current
from the maximum possible value to zero.
This parameter defines the dither signal amplitude. The
dither signal is a square wave added to the proportional-
valve set-point. In this way the response to set-point
variations results optimized. This parameter is a
percentage of the valve maximum current. Setting the
parameter to 0% means the dither is not used.
The available values are:
0.0%, 1.0%, 2.5%, 4.0%, 5.5%, 7.0%, 8.5%, 10%,
11.5%, 13.0%
This parameter defines the dither frequency.
The available values are:
20.8, 22.7, 25, 27.7, 31.2, 35.7, 41.6, 50, 62.5, 83.3
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