Moeller DF51 - Page 93

10/05 AWB8230-1541GB
Motor control
89
Defining reference value through voltage
Analog input O
The external reference voltage signal can be specifically matched
with parameters PNU A011 to A016, which are described below.
You can assign the output frequency to a user-definable voltage
reference value range.
Using PNU A016 you can adjust analog reference signal filtering.
Figure 87: Reference voltage
0 %
0 V
100 %
10 V
f
[Hz]
A014A013
A011
A012
A015 = 00
f
max
A004
A015 = 01
PNU Name RUN b031
= 10
Value Function DS
A011 Analog input
(O-L) –
frequency at
minimum
reference value
– j 0 – 400 Hz Here, the frequency that corresponds to the minimum reference voltage
under PNU A013 is set.
0.0
A012 Analog input
(O-L) –
frequency at
maximum
reference value
0 – 400 Hz Here, you can set the frequency that corresponds to the maximum
reference voltage under PNU A014.
0.0
A013 Analog input
(O-L) –
minimum
reference value
(offset)
0 – 100 % The minimum reference value entered here is a percentage of the
highest possible reference voltage (–10 V to +10 V).
0.0
A014 Analog input
(O-L) –
maximum
reference value
(offset)
0 – 100 % The minimum reference value entered here is a percentage of the
highest possible reference voltage (–10 V to +10 V).
100.
A015 Analog input
(O-L) –
selection of
starting
frequency
applied to the
motor at
minimum
reference value
Determines the behaviour at reference values below the minimum reference value. 01
00 Value of PNU A011
01 0Hz
A016 Analog input –
filter time
constant
To reduce the inverter’s response time to reference value changes at analog input O or OI,
and thereby determine the degree to which analog signal harmonics are filtered, you can
enter a value between 1 and 8 here.
8
1 Minimal filtering effect/fast response to reference value changes
…
8 Maximum filtering effect/slow response to reference value changes