Danfoss VT2800 Series Design Manual page 80

203 Reference range
(REFERENCE RANGE)
Value:
Min. reference - Max reference (MIN - MAX)
-Max. reference - Max. reference
(-MAX - +MAX)
Function:
In this parameter you select whether the reference
signal must be positi v e or whether it can be both
positi v e and negati v e. The minimum limit may be a
negati v e value, unless in parameter 100 Configuration
a selection has been made of Speed regulation,
closed loop. You should select Min ref. - Max. ref.
[0], if Process regulation, closed loop [3] has been
selected in parameter 100 Configuration.
Description of choice:
Select the required range.
204 Minimum reference, Ref
(MIN.REFERENCE)
Value:
Par. 100 Config. = Open loop [0].
-100,000.000 - par. 205 Ref
Par. 100 Config. = Closed loop [1]/[3].
-Par. 414 Minimum feedback - par. 205 Ref
Function:
Minimum reference is an expression of the minimum
possible value of the total of all references. If in
parameter 100 Configuration, Speed regulation,
closed loop [1] or Process regulation, closed loop
[3] is selected, the minimum reference is limited
by parameter 414 Minimum feedback. Minimum
reference is ignored if the local reference is acti v e.
The reference unit can be defined from
the following table:
Par. 100 Configuration
Open loop [0]
Speed reg, closed loop [1]
Process reg, closed loop [3]
Description of choice:
The minimum reference is preset if the motor
has to run at a minimum speed, regardless of
whether the resulting reference is 0.
= factory setting. () = display text [] = value for use in communication via serial communication port
80
[0]
[1]
MIN
0.000 Hz
MAX
MAX
0.000 rpm/par 416
Unit
Hz
rpm
Par. 416
®
VLT 2800 Series
205 Maximum reference, Ref
(MAX.REFERENCE)
Value:
Par. 100 Config. = Open loop [0].
Par. 204 Ref - 1000.000 Hz
MIN
Par. 100 Config. = Closed loop [1]/[3].
Par. 204 Ref - Par. 415 Max. feedback
MIN
Function:
The maximum reference gi v es the highest value
that can be assumed by the sum of all references.
If Closed loop [1]/[3] is selected in parameter 100
Configuration the maximum reference cannot exceed
the value in parameter 415 Maximum feedback.
Maximum reference is ignored if the local
reference is acti v e.
The reference unit can be defined from
the following table:
Par. 100 Configuration
Open loop [0]
Speed reg, closed loop [1]
Process reg, closed loop [3]
Description of choice:
Maximum reference is set, if the speed of the
motor is to be max. the set value, regardless
of the whether the resulting reference is greater
than the maximum reference.
206 Ramp type
(RAMP TYPE)
Value:
Linear (LINEAR)
Sin shaped (SIN SHAPED)
2
Sin shaped (S-SHAPED 2)
Function:
You can choose between a linear, an S-shaped
2
and an S ramp process.
Description of choice:
Select the required ramp type depending on the
required acceleration/deceleration process.
MG.28.E9.02 - VLT is a registered Danfoss trademark
MAX
50.000 Hz
50.000 rpm/par 416
Unit
Hz
rpm
Par. 416
[0]
[1]
[2]