Danfoss VLT Micro Drive FC 51 Series Programming Manual page 32

VLT Micro Drive FC 51
4.5.3. 4-5* Adjustable Warnings
Parameter group containing adjustable warning limits for current, speed, reference and feedback.
Warnings are shown in display, programmed output or serial bus.
4-50 Warning Current Low
Range:
*
0.00 A [0.00 - 26.00 A]
4-51 Warning Current High
Range:
*
26.00 A [0.00 - 26.00 A]
4-58 Missing Motor Phase Function
Option:
[0] Off
On
*
[1]
4.5.4. 4-6* Speed Bypass
In some applications mechanical resonance may occur. Avoid resonance points by creating a bypass. The frequency converter ramps through the bypass
area thereby passing mechanical resonance points quickly.
4-61 Speed Bypass From [Hz]
Range:
*
0.0 Hz [0.0 - 400.0 Hz]
Function:
Use this parameter to set a lower limit for the current range.
If current drops below the set limit, warning bit 8 is set in par. 16-94.
Output Relay can be configured to indicate this warning. LCP warning light does not light when this parameter's
set limit is reached.
Set value for low current limit.
Function:
Use this parameter to set an upper limit for the current range.
If current exceeds the set limit, warning bit 7 is set in par. 16-94.
Output Relay can be configured to indicate this warning. LCP warning light does not light when this parameter's
set limit is reached.
Set upper current limit.
Function:
A missing motor phase causes the motor torque to drop. This monitor may be disabled for special purposes (eg.
small motors running pure U/f mode), but as there is a risk of overheating the motor, Danfoss strongly recom-
mends that the function is On .
A missing motor phases causes the frequency converter to trip and report an alarm.
NB!
This parameter cannot be changed while motor runs.
Function is disabled.
Function is enabled.
Function:
Array [2]
Enter either the lower or upper limit of the speeds to be avoided.
It does not matter whether Bypass From or Bypass To is the upper or lower limit, however the Speed Bypass
function is disabled if the two parameters are set to the same value.
MG.02.C4.02 - VLT is a registered Danfoss trademark
4. Parameter Descriptions
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