Danfoss VT2800 Series Design Manual page 90

327 Pulse reference/feedback the maximum
pulse feedback frequency is set.
Pulse input is selected if a specific number of pulses
must lead to a Precise stop, see parameter 343
Precise stop and parameter 344 Counter value.
Selection of Setup, lsb and Selection of Setup,
msb gi v es the possibility to select one of the
four setups. It is, however, a condition that
parameter 004 is set to Multisetup.
Reset and start can be used as a start function.
If 24 V are connected to the digital input, this will
cause the frequency converter to reset and the motor
will ramp up to the preset reference.
Pulse counter start is used to start a counter
stop sequence with a pulse signal. The pulse
width must at least be 14 ms and not longer
than the count period. See also parameter 343
and the instruction, MI28CXYY.
308 Terminal 53, analogue input voltage
(AI [V]53FUNCT.)
Value:
No function (NO OPERATION)
Reference (REFERENCE)
Feedback (FEEDBACK)
Wobble (WOBB.DELTA FREQ [%])
Function:
In this parameter it is possible to select the function
required to be connected to terminal 53. Scaling of the
input signal is made in parameter 309 Terminal 53, min.
scaling and parameter 310 Terminal 53, max. scaling.
Description of choice:
No function [0]. Is selected if the frequency converter
is not to react to signals connected to the terminal.
Reference [1]. If this function is selected, the reference
can be changed by means of an analogue 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
Feedback [2] on terminal 53.
Wobble [10]
The delta frequency can be controlled by the analog
input. If WOBB.DELTA FREQ is selected as analog
input (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.
= factory setting. () = display text [] = value for use in communication via serial communication port
90
VLT
If this function is chosen, see Wobble Instruction
MI28JXYY for further information.
309 Terminal 53 Min. scaling
(AI 53 SCALE LOW)
Value:
0.0 - 10.0 Volt
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
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 (parameter 317 Time out and 318 Function
after time out), the value set must be higher than 1 Volt.
310 Terminal 53 Max. scaling
(AI 53 SCALE HIGH)
Value:
[0]
0 - 10.0 Volt
[1]
[2]
Function:
[10]
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
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
(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
MG.28.E9.02 - VLT is a registered Danfoss trademark
®
2800 Series
/ 414 Minimum feedback, FB
/ 414 Maximum feedback, FB
0.0 Volt
.
MIN
10.0 Volt
.
MAX
[0]
[1]
[2]
[10]