VLT
®
Series 3500
69
★ = ROM default setting. ✔ = Normal Danfoss setup. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
211 Warning: High Frequency (HI FREQ. W)
Value:
000.0 to 132.0 Hz ★ 132.0 Hz
✔ 66 Hz
Function:
Set the frequency at which the warning is to occur.
Description of choice:
If the output frequency increases above the frequency set
(f
HIGH
), the display will read HI FREQ. WARN. Parameter
407 through 410 allow an external warning signal for high
frequency.
212 Warning: Low Current, I
LOW
(LO CURR. W)
Value:
0.0 to I
VLT,MAX
★ 0.0 A
Function:
Set the current at which the warning is to occur.
Description of choice:
If the motor current drops below the I
LOW
programmed by
this parameter, the display will read LO CURR. WARN. Pa-
rameters 407 to 410 allow an external warning signal for
low current. This indication can be used to signal “loss of
load”, or “broken belt”. Because this sets the drive to give a
warning
any time the motor current is below the value set in
this parameter, setting it to a number other than zero will
cause the drive to give a low current warning when it is
stopped.
213 Warning: High current, |LOW (HI CURR. 213 213
213 Warning: High Current, I
HIGH
(HI CURR. W)
Value:
0.0 to I
VLT,MAX
★ I
VLT,MAX
Function:
Set the current at which the warning is to occur.
Description of choice:
If the motor current rises above the I
HIGH
programmed, the
display will read HI CURR. WARN. The upper warning limit
I
HIGH
of the motor current is programmed within the normal
operating range of the drive. Parameters 407 through 410
allow an external warning signal for high current.
214 Ramp Type (RAMP TYPE)
Value:
★ Linear (LINEAR) [0]
Sine shape (S CURVE 1) [1]
Sine
2
shape (S CURVE 2) [2]
Sine
3
shape (S CURVE 3) [3]
Function:
There is a choice of four types of ramps. The sine shapes
cause a slower rate of change when the actual speed ap-
proaches the set speed. This reduces overshoot and in-
creases system stability.
Description of choice:
Choose the desired ramp type.
215 Accel (ramp-up) Time (RAMP UP TI)
Value:
0000.00 to 3600.00 sec. ★ depends on unit
✔ 60 sec fan
✔ 10 sec pump
Function:
The accel time is the acceleration time from 0 Hz to the
rated motor frequency, provided that the drive is not in cur-
rent limit. Too rapid an acceleration may result in overshoot-
ing, hunting and current limit trips. An accel time of 60 sec-
onds is typical for fans, and 10 seconds is typical for
pumps.
Description of choice:
Choose the desired accel time. This is also chosen in Quick
Set Up Menu step 8.
216 Decel (ramp-down) Time (RAMP DOWN)
Value:
0000.00 to 3600.00 sec. ★ depends on unit
✔ 60 sec fan
✔ 10 sec pump
Function:
The decel time is the deceleration time from the rated motor
frequency to 0 Hz, provided that regeneration from the mo-
tor does not cause an overvoltage fault. Too rapid decelera-
tion may result in overshooting, hunting and overvoltage
faults. A decel time of 60 seconds is typical for fans, and 10
seconds is typical for pumps.
Description of choice:
The desired decel time is programmed. This is also chosen
in Quick Set Up Menu step 9.
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