Danfoss VLT 2800 Series General Information Manual page 63

maximum feedback, parameter 205 Maximum refer-
ence, Ref / 414 Maximum feedback, FB
MAX
Description of choice:
Set the required voltage value. For reasons of accu-
racy, compensation should be made for voltage losses
in long signal cables.
314 Terminal 60, analogue input current
(AI [mA] 60 FUNCT)
Value:
No function (no operation)
Reference (reference)
Feedback (feedback)
Wobble (WOBB.DELTA FREQ [%])
Function:
This parameter allows a choice 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.
Description of choice:
No function [0]. Is selected if the adjustable frequency
drive is not to react to signals connected to the termi-
nal. Reference [1]. If this function is selected, the ref-
erence can be changed by means of 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
Feedback [2] on terminal 60.
Wobble [10]
The delta frequency can be controlled by the analog
input. If WOBB.DELTA FREQ is selected as analog in-
put (par. 308 or par. 314) the value selected in par. 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 chosen, see Wobble Instruction MI28JXYY for fur-
ther information.
= factory setting, () = display text, [] = value for use in communication via serial communication port
®
MG.27.A2.22 - VLT is a registered Danfoss trademark
315
.
MAX
Value:
0.0 - 20.0 mA
Function:
In this parameter, you can set the signal value that will
correspond to the minimum reference or minimum
feedback, parameter 204 Minimum reference, Ref
414 Minimum feedback, FB
Description of choice:
Set the required current value. If the Timeout function
[0]
is to be used (parameter 317 Time out and 318 Func-
[1] tion after time out ), the value set must be higher than
2 mA.
[2]
[10]
316
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, pa-
rameter 205 Maximum reference value, Ref
Description of choice:
Set the required current value.
317
Value:
1 - 99 sec.
Function:
If the signal value of the reference or feedback signal
connected to one of the input terminals 53 or 60 falls
below 50 % of the minimum scaling for a period longer
than the time set, the function selected in parameter
318 Function after time out will be activated. This func-
tion is only active if in parameter 309 Terminal 53, min.
scaling a value higher than 1 Volt has been selected,
or if in parameter 315 Terminal 60, min. scaling a value
higher than 2 mA has been selected.
®
VLT 2800 Series
Terminal 60 Min. scaling
(AI 60 SCALE LOW)
.
MIN
Terminal 60 Max. scaling
(AI 60 SCALE HIGH)
Time out
(LIVE ZERO TIME O)
4.0 mA
/
MIN
20.0 mA
.
MAX
10 sec.
63