4-55 Warning Reference High
Range: Function:
4999.000* [Depend on
the
value of
4-54 Warning
Reference Low-
4999.000]
Use this parameter to set a higher
limit for the reference range.
When the actual reference exceeds
this limit, the display reads
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-
Depend
on the
value of 4-57
Warning
Feedback High]
Use this parameter to set a lower
limit for the feedback range.
When the feedback falls below
this limit, the display reads
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
the
value of 4-56
Warning
Feedback Low
-4999.000]
Use this parameter to set a higher
limit for the feedback range.
When the feedback exceeds this
limit, the display reads Feedback
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.
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].
Parameter Descriptions
VLT
®
Micro Drive FC 51 Programming Guide
MG02C602 - VLT
®
is a registered Danfoss trademark
27
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