Danfoss VLT 2800 Series Operating Instructions Manual page 30

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 positive or whether it can be both pos-
itive and negative. The minimum limit may be a nega-
tive 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 Proc-
ess 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 Mini-
mum feedback - par. 205
Ref
MAX
Function:
Minimum reference is an expression of the minimum
possible value of the total of all references. If in pa-
rameter 100 Configuration, Speed regulation, closed
loop [1] or Process regulation, closed loop [3] is selec-
ted, the minimum reference is limited by parameter
414 Minimum feedback. Minimum reference is ignored
if the local reference is active.
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
®
MG.27.A2.02 - VLT is a registered Danfoss trademark
[0]
[1]
The maximum reference gives 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
active.
The reference unit can be defined from the following
table:
Par. 100 Configuration
Open loop [0]
MIN
Speed reg, closed loop [1]
Process reg, closed loop [3]
Maximum reference is set, if the speed of the motor is
0.000 Hz
MAX
to be max. the set value, regardless of the whether the
resulting reference is greater than the maximum ref-
erence.
0.000 rpm/par 416
You can choose between a linear, an S-shaped and
an S
Unit
Hz
rpm
Select the required ramp type depending on the re-
Par. 416
quired acceleration/deceleration process.
®
VLT 2800 Series
Maximum reference, Ref
205
(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.
MIN
feedback
Function:
Description of choice:
206 Ramp type
(Ramp type)
Value:
Linear (Linear)
Sin shaped (SIN SHAPED)
2
Sin shaped (S-SHAPED 2)
Function:
2
ramp process.
Description of choice:
MAX
50.000 Hz
50.000 rpm/par 416
Unit
Hz
rpm
Par. 416
[0]
[1]
[2]
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