Danfoss VLT Micro Drive FC 51 Programming Manual page 28

Parameter Descriptions ®
VLT Micro Drive FC 51 Programming Guide
4-55 Warning Reference High
Range: Function:
4999.000 * [Depend on Use this parameter to set a higher
the value of limit for the reference range.
4-54 Warning When the actual reference exceeds
Reference Low- this limit, the display reads
4999.000] Reference High. Warning bit 19 is
set in 16-94 Ext. Status Word. Output
Relay can be configured to indicate
this warning. LCP warning light does
not light when this parameter set
limit is reached.
4-56 Warning Feedback Low
Range: Function:
-4999.000 [-4999.000- Use this parameter to set a lower
*
Depend on the limit for the feedback range.
value of 4-57 When the feedback falls below
Warning this limit, the display reads
Feedback High] Feedback Low. Warning bit 6 is set
in 16-94 Ext. Status Word. Output
Relay can be configured to
indicate this warning. LCP warning
light does not light when this
parameter set limit is reached.
4-57 Warning Feedback High
Range: Function:
4999.000 * [Depend on Use this parameter to set a higher
the value of 4-56 limit for the feedback range.
Warning When the feedback exceeds this
Feedback Low limit, the display reads Feedback
-4999.000] High. Warning bit 5 is set in 16-94
Ext. Status Word. Output Relay can
be configured to indicate this
warning. LCP warning light does
not light when this parameter set
limit is reached.
4-58 Missing Motor Phase Function
Option: 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 recommends that the function is On.
A missing motor phase causes the frequency converter
to trip and report an alarm.
NOTE
This parameter cannot be changed while motor
runs.
[0] Off Function is disabled.
[1] On Function is enabled.
*
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4.5.5 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]
Array [2]
Range: Function:
0.0 Hz [0.0-400.0 Hz] 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.
4-63 Speed Bypass To [Hz]
Array [2]
Range: Function:
0.0 Hz [0.0-400.0 Hz] Enter either the upper or lower limit of
*
the speed area to be avoided.
Make sure to enter the opposite limit of
that in 4-61 Speed Bypass From [Hz].
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