Vacon asfiff12, Руководство пользователя

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38 • vacon ASFIFF12 High Speed
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603 Voltage at field weakening point
(2.6.5)
Above the frequency at the field weakening point, the output voltage remains at the set
maximum value. Below the frequency at the field weakening point, the output voltage
depends on the setting of the U/f curve parameters. See parameters
ID109 , ID108 ,
ID604 and ID605.
When the parameters
ID110 and ID111 (nominal voltage and nominal frequency of the
motor) are set, the parameters ID602 and ID603 are automatically given the
corresponding values. If you need different values for the field weakening point and the
maximum output voltage, change these parameters
after setting the parameters ID110
and ID111 .
604 U/f curve, middle point frequency
(2.6.6)
If the programmable U/f curve has been selected with parameter ID108 this parameter
defines the middle point frequency of the curve. See Figure 5-2.
605 U/f curve, middle point voltage
(2.6.7)
If the programmable U/f curve has been selected with the parameter ID108 this
parameter defines the middle point voltage of the curve. See Figure 5-2.
606 Output voltage at zero frequency
(2.6.8)
If the programmable U/f curve has been selected with the parameter ID108 this
parameter defines the zero frequency voltage of the curve. NOTE: If the value of
parameter ID108 is changed this parameter is set to zero. See Figure 5-2.
607 Overvoltage controller
(2.6.10)
These parameters allow the under-/overvoltage controllers to be switched out of
operation. This may be useful, for example, if the mains supply voltage varies more than
–15% to +10% and the application will not tolerate this over-/undervoltage. In this case,
the regulator controls the output frequency taking the supply fluctuations into account.
0 Controller switched off
1 Controller switched on (no ramping) = Minor adjustments of OP frequency are made
2 Controller switched on (with ramping) = Controller adjusts OP freq. up to max.freq.
608 Undervoltage controller
(2.6.11)
See ID607.
Note: Over-/undervoltage trips may occur when controllers are switched out of operation.
0 Controller switched off
1 Controller switched on