Speed Bypass - Danfoss VLT HVAC Basic Drive FC 100 Series Programming Manual

Parameters
4-54 Warning Reference Low
Range:
-999999.999
*
3 3
4-55 Warning Reference High
Range:
4999.000 [Depend on
*
the value of
4-54 Warning
Reference Low-
4999.000]
4-56 Warning Feedback Low
Range:
-4,999.000 [-4,999.000 -
*
Depends on the
value of 4-57
Warning
Feedback High]
4-57 Warning Feedback High
Range:
4,999.000 [Depends on
*
the value of 4-56
Warning
Feedback Low
-4,999.000]
3-18
Function:
[ -999999.999 - Enter the lower reference limit.
par. 4-55 ] When the actual reference falls
below this limit, the display
indicates Ref
LOW
outputs can be programmed to
produce a status signal on
terminal 27 or 29 ( only) and on
relay output 01 or 02 ( only).
Function:
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.
Function:
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.
Function:
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.
MG18B222 - VLT
®
VLT HVAC Basic Drive Programming Guide
4-58 Missing Motor Phase Function
Option: Function:
. The signal
[0] Off No alarm is displayed if a missing motor phase occurs.
[1] On An alarm is displayed if a missing motor phase occurs.
NOTE!
This parameter cannot be adjusted while the motor is
running. Missing Motor phase Function is always disabled
with PM.

3.5.4 4-6* Speed Bypass

Define the speed bypass areas for the ramps. Some
systems call for avoiding certain output frequencies or
speeds due to resonance problems in the system. Three
frequency ranges can be avoided.
4-61 Bypass Speed From [Hz]
Array [3]
Range:
0 Hz
*
4-63 Bypass Speed To [Hz]
Array [3]
Range:
0 Hz
*
®
is a registered Danfoss trademark
Select On, to display an alarm in the event of a missing
motor phase. Select Off, for no missing motor phase
alarm. However the On setting is strongly
recommended to avoid motor damage.
Function:
[0 - 400 Hz] Some systems call for avoiding certain
output speeds due to resonance problems
in the system. Enter the lower limits of the
speeds to be avoided.
Function:
[0 - 400 Hz] Some systems call for avoiding certain
output speeds due to resonance problems
in the system. Enter the upper limits of the
speeds to be avoided.