25 … 68
24 … 68
Printed in German
y • Edition 02.14 • Nr
. 254 722
8 Parameters
8.2 P2x Fan
Parameter
P2x
Designation
Description
Setting
P25
Fan: allowed toler-
ance
a) For fan control:
not relevant
b) For fan regulation:
Here the allowed deviation between
the fan speed and the current nomi-
nal speed is defined. If the speed
has been outside this tolerance
range for a longer time period, the
MPA is switched off.
P26
Fan: Min. speed.
a) For fan control:
The minimum PWM activation
can be defined. If this value is not
reached, the fan does not work cor-
rectly. Typically, a fan only works
properly if the PWM signal reaches
approx. 10 to 20 %. If this value is
not reached, the fan begins to oscil-
late or does not work.
If a fan activation lower than this
value is calculated due to the set-
tings in the curve segment, the
MPA is switched off displaying a
corresponding error message.
Attention! There is no direct rela-
tion to the speed at a modulation
degree of 100 %!
b) For fan regulation:
A minimum speed can also be
entered here If this value is not
reached during the calculations
from the curve segment, the MPA
creates a corresponding error mes-
sage.
Attention! There is no direct rela-
tion to the speed at a modulation
degree of 0 %!
P27
Fan: Max. speed
a) For fan control:
This parameter should be set to 100
%. If another value is entered here,
this will influence the programmed
values in the curve segment!
b) For fan regulation:
Here, the maximum speed of the
fan must be entered. A fan reaches
the maximum speed if it is activated
with 100% PWM and the air flow is
blocked.
Attention! There is no direct rela-
tion to the speed at a modulation
degree of 100 %! (apply for adjust-
ment a) and b))
