10/05 AWB8230-1541GB
Motor control
95
Minimum and maximum operating frequency
With PNU A061 and A062 you can limit the frequency range
defined with PNU b082 (starting frequency) and PNU A004
(maximum frequency) (a fig. 95). As soon as the frequency
inverter receives a start signal, it outputs the frequency set with
PNU A062; at maximum setpoint frequency, the frequency set
with PNU A061.
For further information, see paragraph “Limit and target values”,
page 66.
Figure 95: Upper frequency limit (PNU A061) and lower frequency
limit (PNU A062)
0
100 %
f
[Hz]
A004
A061
A062
b082
PNU Name RUN b031
= 10
Value Function DS
A004 End frequency
(fmax)
– – 30 – 400 Hz Maximum output frequency 50
{60}
A204
A061 Maximum
operating
frequency
– j 0 – 400 Hz This function can be deactivated by entering 0.0 0.0
A062 Minimum
operating
frequency
0 – 400 Hz 0.0
A262
b082 Increased
starting
frequency
(e.g. with high
level of friction)
– j 0.5 – 9.9 Hz A higher starting frequency results in shorter acceleration and
deceleration times (for example to overcome high frictional resistance).
If the frequencies are too high, fault message E002 may be issued. Up
to the set starting frequency, the motor accelerates without a ramp
function.
0.5
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