Danfoss VLT 2800 Series General Information

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 af-
ter a stop command or during stop. The warning func-
tions are activated when the output frequency has
reached the resulting reference.The signal outputs
can be programmed to give a warning signal via ter-
minal 46 and via the relay output.The unit for feedback
in Closed loop is programmed in parameter 416 Proc-
ess units.
Description of choice:
Set the required value within the feedback range (pa-
rameter 414 Minimum feedback, FB
MIN
and 415 Max-
imum 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 af-
ter a stop command or during stop. The warning func-
tions are activated when the output frequency has
reached the resulting reference. The signal outputs
can be programmed to give a warning signal via ter-
minal 46 and via the relay output. The unit for feedback
in Closed loop is programmed in parameter 416 Proc-
ess units.
Description of choice:
Set the required value within the feedback range (pa-
rameter 414 Minimum feedback, FB
MIN
and 415 Max-
imum feedback, FB
MAX
).
229 Frequency 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 by-
pass, 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.
230 Frequency bypass 1 (FREQ. BYPASS 1)
231 Frequency bypass 2 (FREQ. BYPASS 2)
Value:
0 - 1000 Hz
0.0 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 param-
eter 229 Frequency bypass, bandwidth.
VLT
®
2800 Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
58 MG.27.A2.22 - VLT
®
is a registered Danfoss trademark

Danfoss VLT 2800 Series Specifications

General

Frequency	50/60 Hz
Communication Options	RS-485, Profibus DP
Protection Features	Overcurrent, Overvoltage, Undervoltage, Short Circuit
Enclosure Rating	IP20
Storage Temperature	-25 to +65°C
Relative Humidity	5 - 95% RH, non-condensing
Altitude	Up to 1000m above sea level