Danfoss VLT 2800 Design Manual page 89

Programming
Select [1] Reference to change the reference with an analog
reference signal. If reference signals are connected to more
than one input, these reference signals must be added up.
If a voltage feedback signal is connected, select [2]
Feedback on terminal 53.
[10] Wobble
The delta frequency can be controlled by the analog input.
If WOBB.DELTA FREQ is selected as analog input (parameter
308 Terminal 53, analog input voltage or parameter 314
Terminal 60, analogue input current), the value selected in
parameter 702 equals 100 % analog input.
Example: Analog input = 4-20 mA, Delta freq. par. 702 = 5
Hz ⇒ 4 mA = 0 Hz and 20 mA = 5 Hz. If this function is
selected, see Wobble Instruction for further information.
309 Terminal 53 Min. scaling
Value:
0.0 - 10.0 V
Function:
This parameter is used for setting the signal value that is
to correspond to the minimum reference or the minimum
feedback, parameter 204 Minimum reference, Ref
Minimum feedback, FB .
MIN
Description of choice:
Set the required voltage value. For reasons of accuracy,
compensation should be made for voltage loss in long
signal cables. If the time-out function is to be used
(parameters 317 Time out and 318 Function after time out),
set the value higher than 1 V.
310 Terminal 53 Max. scaling
Value:
0-10.0 V
Function:
This parameter is used for setting the signal value that is
to correspond to the maximum reference value or
maximum feedback, parameter 205 Maximum reference,
Ref /414 Maximum feedback, FB
MAX
Description of choice:
Set the required voltage value. For reasons of accuracy,
compensation should be made for voltage losses in long
signal cables.
314 Terminal 60, analogue input current
Value:
No function (no operation)
Reference (reference)
Feedback (feedback)
Wobble (WOBB.DELTA FREQ [%])
Function:
Select between the different functions available for the
input, terminal 60. Scaling of the input signal is effected in
parameter 315 Terminal 60, min. scaling and parameter 316
Terminal 60, max. scaling.
MG27E402
Design Guide
0.0 V
/414
MIN
10.0 V
.
MAX
[0]
[1]
[2]
[10]
Danfoss A/S © Rev. May/2014 All rights reserved.
Description of choice:
[0] No function. Is selected if the frequency converter is not
to react to signals connected to the terminal.
[1] Reference. If this function is selected, the reference can
be changed with an analog reference signal. If reference
signals are connected to more than one input, these
reference signals must be added up.
If one current feedback signal is connected, select [2]
Feedback on terminal 60.
[10] Wobble
The delta frequency can be controlled by the analog input.
If WOBB.DELTA FREQ is selected as analog input (parameter
308 Terminal 53, analog input voltage or parameter 314
Terminal 60, analogue input current) the value selected in
parameter 702 equals 100 % analog input.
Example: Analog input = 4-20 mA, Delta freq. parameter
702 = 5 Hz ⇒ 4 mA = 0 Hz and 20 mA = 5 Hz. If this
function is selected, see Wobble Instruction for further
information.
315 Terminal 60 Min. scaling
Value:
0.0 - 20.0 mA
Function:
Use this parameter to set the signal value that corresponds
to the minimum reference or minimum feedback,
parameter 204 Minimum reference, Ref
feedback, FB .
MIN
Description of choice:
Set the required current value. If the time-out function is
to be used (parameters 317 Time out and 318 Function after
time out), the value set must be higher than 2 mA.
316 Terminal 60 Max. scaling
Value:
0.0 - 20.0 mA
Function:
This parameter is used for setting the signal value that is
to correspond to the maximum reference value, parameter
205 Maximum reference value, Ref
Description of choice:
Set the required current value.
317 Time out
Value:
1 - 99
Function:
If the signal value of the reference or feedback signal
connected to one of the input terminals 53 or 60 drops
below 50% of the minimum scaling for a period longer
than the time set, the function selected in parameter 318
Function after time out is activated. This function is only
active if a value higher than 1 V has been selected in
parameter 309 Terminal 53, min. scaling, or if a value higher
than 2 mA has been selected in parameter 315 Terminal 60,
min. scaling.
4.0 mA
/414 Minimum
MIN
20.0 mA
.
MAX
10
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