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NORDAC FLEX (SK 200E ... SK 235E) – Users Manual for Frequency Inverters
NOTE:
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Abs. minimum frequency
P505
(absolute minimum frequency)
0.0 ... 10.0 Hz
Specifies the frequency value that cannot be undershot by the VFD. If the setpoint becomes
smaller than the absolute minimum frequency, the VFD switches off or changes to 0.0 Hz.
{ 2.0 }
At the absolute minimum frequency, braking control (P434) and the setpoint delay (P107) are
actuated. If a setting value of "zero" is selected, the brake relay does not switch during reversing.
When controlling lift equipment without speed feedback, this value should be set to a minimum of
2 Hz. From 2 Hz, the current control of the VFD operates and a connected motor can supply
sufficient torque.
NOTE:
Output frequencies < 4.5 Hz lead to current limitation (chapter 8.4.3).
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Automatic acknowled.
P506
(automatic fault acknowledgement)
0 ... 7
In addition to the manual error acknowledgement, an automatic one can also be selected.
{ 0 }
0 =
1 ... 5 =
6 =
7 =
NOTE: If (P428) is parameterized to "ON", parameter (P506) "Automatic fault acknowledgement"
must not be parameterized to setting 6 "Always" as otherwise the device or system is endangered
due to the possibility of continuous restarting in the case of an active error (e.g. short-circuit to
ground/short circuit).
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190
Setting 16.4: Automatic load adjustment
The pulse frequency is automatically adjusted between a minimum value (highest
load reserve) and a maximum value (lowest load reserve) depending on the load.
During an acceleration phase and if high power is required (≥ rated power) the
minimum value is set. With constant speed and a power requirement ≤ 80% to the
rated power, the high pulse frequency is set.
no automatic fault acknowledgement.
number of permissible automatic malfunction acknowledgments within one power-on
cycle. After power is switched off and on, the full amount is again available.
always, a fault message will always be acknowledged automatically if the cause of the
error is no longer present.
quit disable., acknowledgement is only possible using the OK/ENTER key or by
power-off. No acknowledgement is implemented by removing the enable!
S
P
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BU 0200 en-US-4920
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