Setting Parameters
09/01 AWB8230-1412GB
90
Scaling adjustment
Scaling adjustment and scaling allow the setpoint and actual value
to be displayed and the setpoint value to be entered directly in the
correct physical unit. For this purpose, 100 % of the returned
actual value is taken as a basis. By default, inputs and displays are
based on 0 to 100 %.
Example: In the first diagram in Figure 89, 20 mA of the feedback
signal correspond to 100 % of the PID internal factor. If for
example the current flow is 60 m
3
/min with a feedback signal of
20 mA, the parameter is set to 0.6 with PNU A75 (= 60/100). With
PNU d04, the process corrected value can be displayed and the
setpoint value can be entered directly as a process corrected
quantity.
Summary of the relevant parameters
With the DF5 series frequency inverters, the same parameters are
used for both the frequency control mode and the PID mode. The
designations of the respective parameter only relate to the
frequency control mode, however, as this mode is used in most
cases. When the PID mode is used, some of the parameters have
other designations.
The following table contains an explanation of these parameters
in conjunction with the frequency control mode as well as the PID
mode:
Factory default setting PNU A75 = 0.6
Figure 90: Example for scaling adjustment
w: Setpoint value
x: Returned actual value
a Fan
w [%]
PNU F01
= 0 – 100 %
PNU d01
= 0 – 100 %
B1
P1
x
4 – 20 mA
G1
a
M
3
~
w [%]
PNU F01
0 – 60m
3
/min
PNU d01
0 – 60m
3
/min
B1
P1
x
4 – 20 mA
G1
a
M
3
~
PNU Meaning of the parameters when used in
Frequency control mode PID mode
d04 – Display of the returned actual value
F01
Displays of the output frequency Display of the setpoint value
A01
Defined frequency setpoint Defined setpoint
A11
Frequency with minimum setpoint value (Units: Hz) Feedback percentage actual value for lower acceptance
threshold (units: %)
A12
Frequency with maximum setpoint value (Units: Hz) Feedback percentage actual value for upper acceptance
threshold (Units: %)
A13
Minimum setpoint value (Units: Hz) Lower acceptance threshold for the voltage or current on the
actual value input (Units: %)
A14
Maximum setpoint value (Units: Hz) Upper acceptance threshold for the voltage or current at the
actual value input (Unit: %)
A21 to A35
Fixed frequencies 1 to 15 Digital adjustable setpoint values 1 to 15
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