Danfoss VLT 2800 Design Manual page 85

Programming
Description of choice:
The lower signal limit of the output frequency f
be programmed within the normal operating range of the
frequency converter. See Illustration 4.12 for more details.
226 Warning: High frequency f
Value:
Par. 200 Frequency range = 0-132 Hz [0]/
[1].par. 225 f - 132 Hz
LOW
Par. 200 Frequency range = 0-590 Hz
[2]/[3].par. 225 f - 590 Hz
LOW
Function:
If the output frequency exceeds the preset limit f
warning is given.
Parameters 223-228 Warning functions do not work during
ramp-up after a start command and after stop command
or during stop. The warning functions are activated when
the output frequency has reached the resulting reference.
The signal outputs can be programmed to give a warning
signal via terminal 46 and via the relay output.
Description of choice:
Programme the output frequency's upper signal limit f
within the frequency converter's normal operating range.
See Illustration 4.12 for more details.
227 Warning: Low feedback, FB
Value:
-100,000.000 - par. 228 Warn.:FB
Function:
If the feedback signal drops below the preset limit FB
warning is given.
Parameters 223-228 Warning functions are out of function
during ramp-up after a start command and after a stop
command or during stop. The warning functions are
activated when the output frequency has reached the
resulting reference. The signal outputs can be programmed
to give a warning signal via terminal 46 and via the relay
output. The unit for feedback in Closed loop is
programmed in parameter 416 Process units.
Description of choice:
Set the required value within the feedback range
(parameters 414 Minimum feedback, FB
Maximum feedback, FB ).
MAX
228 Warning: High feedback, FB
Value:
Parameter 227 Warn.: FB
LOW
Function:
If the feedback signal gets above the preset limit FB
warning is given.
Parameters 223-228 Warning functions are out of function
during ramp-up after a start command and after a stop
command or during stop. The warning functions are
activated when the output frequency has reached the
resulting reference. The signal outputs can be programmed
to give a warning signal via terminal 46 and via the relay
MG27E402
Design Guide
must
LOW
HIGH
132.0 Hz
132.0 Hz
, a
HIGH
HIGH
LOW
-4000.000
HIGH
, a
LOW
and 415
MIN
HIGH
- 100,000.000
4000.000
, a
HIGH
Danfoss A/S © Rev. May/2014 All rights reserved.
output. The unit for feedback in closed loop is
programmed in parameter 416 Process units.
Description of choice:
Set the required value within the feedback range
(parameter 414 Minimum feedback, FB
feedback, FB ).
MAX
229 Frequence bypass, bandwidth
Value:
0 (OFF) - 100 Hz
Function:
Some systems call for some output frequencies to be
avoided because of mechanical resonance problems in the
system. In parameters 230-231 Frequency bypass, these
output frequencies can be programmed. In this parameter,
a bandwidth can be defined on either side of these
frequencies.
Description of choice:
The frequency set in this parameter is centered around
parameters 230 Frequency bypass 1 and 231 Frequency
bypass 2.
230 Frequency bypass 1 (FREQ. BYPASS 1)
231 Frequency bypass 2 (FREQ. BYPASS 2)
Value:
0 - 1000 Hz
Function:
Some systems call for some output frequencies to be
avoided because of mechanical resonance problems in the
system.
Description of choice:
Enter the frequencies to be avoided. See also chapter 4.3.1
Frequency bypass, bandwidth parameter229 for more details.
and 415 Maximum
MIN
4
0 Hz
0.0 Hz
83
4