Danfoss VLT Midi Drive FC 280 Programming Manual page 46

Parameter Descriptions
3-10 Preset Reference
Range:
0 % [-100 -
*
100 %]
4 4
3-11 Jog Speed [Hz]
Range:
5 Hz [ 0 - 500.0
*
Hz]
3-12 Catch up/slow Down Value
Range:
0 % [0 -
*
100 %]
3-14 Preset Relative Reference
Range:
0 % [-100 -
*
100 %]
Illustration 4.3 Preset Relative Reference
44
Function:
Enter up to 8 different preset references (0–7)
in this parameter, using array programming. For
selecting dedicated references, select preset
reference bit 0/1/2 [16], [17], or [18] for the
corresponding digital inputs in parameter group
5-1* Digital Inputs.
Function:
The jog speed is a fixed output speed at
which the frequency converter runs when
the jog function is activated. See also
parameter 3-80 Jog Ramp Time.
Function:
Enter a percentage value to be either added to or
deducted from the actual reference for catching
up or slowing down respectively. If [28] Catch up is
selected via 1 of the digital inputs
(parameter 5-10 Terminal 18 Digital Input to
parameter 5-15 Terminal 33 Digital Input), the
percentage value is added to the total reference. If
[29] Slow down is selected via 1 of the digital
inputs (parameter 5-10 Terminal 18 Digital Input to
parameter 5-15 Terminal 33 Digital Input), the
percentage value is deducted from the total
reference.
Function:
The actual reference, X, is increased or decreased
with the percentage Y, set in
parameter 3-14 Preset Relative Reference. This
results in the actual reference Z. Actual reference
(X) is the sum of the inputs selected in
parameter 3-15 Reference 1 Source,
parameter 3-16 Reference 2 Source,
parameter 3-17 Reference 3 Source, and
parameter 8-02 Control Source.
Y
Resulting
Relative Z
actual
X
Z=X+X*Y/100
reference
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®
VLT Midi Drive FC 280
-100
Illustration 4.4 Actual Reference
3-15 Reference 1 Source
Option:
[0] No function
[1] Analog Input 53
*
[2] Analog Input 54
[7] Frequency input
29
[8] Frequency input
33
[11] Local bus
reference
[20] Digital pot.meter
[32] Bus PCD
3-16 Reference 2 Source
Option:
[0] No function
[1] Analog Input 53
[2] Analog Input 54
*
[7] Frequency input
29
[8] Frequency input
33
[11] Local bus
reference
Z
X
Y
0 100 %
P 3-14
Function:
Select the reference input to be used
for the first reference signal.
Parameter 3-15 Reference 1 Source,
parameter 3-16 Reference 2 Source, and
parameter 3-17 Reference 3 Source define
up to 3 different reference signals. The
sum of these reference signals defines
the actual reference.
Function:
Select the reference input to be used
for the first reference signal.
Parameter 3-15 Reference 1 Source,
parameter 3-16 Reference 2 Source, and
parameter 3-17 Reference 3 Source define
up to 3 different reference signals. The
sum of these reference signals defines
the actual reference.
MG07C302