Danfoss VT2800 Series, Design Manual

Page: 85 / 162

VLT
®
2800 Series
Programming
outputs can be programmed to give a warning signal
via terminal 46 and via the relay output.
Description of choice:
The lower signal limit of the output frequency f
LOW
must be programmed within the normal operating
range of the frequency converter. See drawing at
parameter 223 Warning: Low current, I
LOW
.
226 Warning: High frequency f
HIGH
(WARN.FREQ.HIGH)
Value:
Par. 200 Frequency range = 0-132 Hz [0]/[1].
par. 225 f
LOW
- 132 Hz
✭
132.0 Hz
Par. 200 Frequency range = 0-1000 Hz [2]/[3].
par. 225 f
LOW
- 1000 Hz ✭
132.0 Hz
Function:
If the output frequency exceeds the preset
limit f
HIGH
a 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:
The output frequency ’ s upper signal limit f
HIGH
must
be programmed within the frequency converter ’ s
normal operating range. See drawing at parameter
223 Warning: Low current, I
LOW
.
227 Warning: Low feedback, FB
LOW
(WARN.FEEDB. LOW)
Value:
-100,000.000 - par. 228 Warn.:FB
HIGH
✭
-4000.000
Function:
If the feedback signal falls below the preset
limit FB
LOW
, a 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
(parameter 414 Minimum feedback, FB
MIN
and
415 Maximum feedback, FB
MAX
).
228 Warning: High feedback, FB
HIGH
(WARN.FEEDB HIGH)
Value:
Par. 227 Warn.: FB
LOW
- 100,000.000
✭
4000.000
Function:
If the feedback signal gets above the preset
limit FB
HIGH
, a 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
(parameter 414 Minimum feedback, FB
MIN
and
415 Maximum feedback, FB
MAX
).
229 Frequence bypass, bandwidth
(FREQ BYPASS B.W.)
Value:
0 (OFF) - 100 Hz
✭
0 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 will be centered
around parameters 230 Frequency bypass 1
and 231 Frequency bypass 2 .
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.28.E9.02 - VLT is a registered Danfoss trademark
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