Danfoss VLT FC 100 Series Programming Manual page 66

Parameter Description
4-55 Warning Reference High
Range:
999999.999 [ par. 4-54 -
*
999999.999 ]
4-56 Warning Feedback Low
Range:
-999999.999 [ -999999.999 -
ProcessCtrlUnit par. 4-57
*
ProcessCtrlUnit]
4-57 Warning Feedback High
Range:
999999.999 [ par. 4-56 -
ProcessCtrlUnit 999999.999
*
ProcessCtrlUnit]
4-58 Missing Motor Phase Function
Option: Function:
Displays an alarm in the event of a missing
motor phase.
[0] Disabled No alarm is displayed if a missing motor
phase occurs.
[2] Trip 1000 ms
*
NOTE!
This parameter cannot be adjusted while the motor is
running.
3.6.3 4-6* Speed Bypass
Some systems call for avoiding certain output frequencies
or speeds due to resonance problems in the system. A
maximum of four frequency or speed ranges can be
avoided.
®
VLT HVAC Drive Programming Guide
Function:
Enter the upper reference limit.
When the actual reference
exceeds this limit, the display
reads Ref High. The signal
outputs can be programmed to
produce a status signal on
terminal 27 or 29 and on relay
output 01 or 02.
Function:
Enter the lower feedback
limit. When the feedback
falls below this limit, the
display reads Feedb Low.
The signal outputs can be
programmed to produce a
status signal on terminal
27 or 29 and on relay
output 01 or 02.
Function:
Enter the upper feedback
limit. When the feedback
exceeds this limit, the
display reads Feedb High.
The signal outputs can be
programmed to produce
a status signal on terminal
27 or 29 and on relay
output 01 or 02.
MG11CD22 - VLT ® is a registered Danfoss trademark
4-60 Bypass Speed From [RPM]
Array [4]
Range:
Size related [ 0 - par. 4-13 RPM]
*
4-61 Bypass Speed From [Hz]
Array [4]
Range: Function:
Size related [ 0.0 - par. Some systems call for avoiding
*
4-14 Hz] certain output speeds due to
resonance problems in the system.
Enter the lower limits of the speeds
to be avoided.
4-62 Bypass Speed to [RPM]
Array [4]
Range:
Size related [ 0 - par. 4-13 RPM]
*
4-63 Bypass Speed To [Hz]
Array [4]
Range:
Size related [ 0.0 - par. 4-14 Hz]
*
3.6.4 Semi-Automatic Bypass Speed Set-up
The Semi-Automatic Bypass Speed Set-up can be used to
facilitate the programming of the frequencies to be
skipped due to resonances in the system.
The following process is to be carried out:
1. Stop the motor.
2. Select Enabled in 4-64 Semi-Auto Bypass Set-up.
3. Press Hand On on the LCP to start the search for
frequency bands causing resonances. The motor
will ramp up according to the ramp set.
4. When sweeping through a resonance band, press
OK on the LCP when leaving the band. The actual
frequency will be stored as the first element in
4-62 Bypass Speed to [RPM] or 4-63 Bypass Speed
To [Hz] (array). Repeat this for each resonance
band identified at the ramp-up (maximum four
can be adjusted).
5. When maximum speed has been reached, the
motor will automatically begin to ramp down.
Repeat the above procedure when speed is
leaving the resonance bands during the
deceleration. The actual frequencies registered
when pressing OK will be stored in 4-60 Bypass
Speed From [RPM] or 4-61 Bypass Speed From [Hz].
Function:
3 3
Function:
Function:
3-39