VLT
®
2800 Series
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
gives 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)
[0]
✭
Reference (REFERENCE)
[1]
Feedback (FEEDBACK)
[2]
Wobble (WOBB.DELTA FREQ [%])
[10]
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.
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
✭
0.0 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
/ 414
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 (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 - 10.0 Volt
✭
10.0 Volt
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
MAX
/ 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
(AI [MA] 60 FUNCT)
Value:
No function (NO OPERATION)
[0]
Reference (REFERENCE)
[1]
✭
Feedback (FEEDBACK)
[2]
Wobble (WOBB.DELTA FREQ [%])
[10]
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
✭
= 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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