Danfoss VLT Programming Manual page 50

Parameter Description
3-14 Preset Relative Reference
Range: Function:
0.00 % [-100.00 - The actual reference, X, is increased or
*
100.00 %] decreased with the percentage Y, set in
3-14 Preset Relative Reference. This results in
the actual reference Z. Actual reference (X)
is the sum of the inputs selected in
3-15 Reference 1 Source, 3-16 Reference 2
Source, 3-17 Reference 3 Source and
8-02 Control Source.
Y
Relative
X
Z=X+X*Y/100
Z
-100 0
®
VLT HVAC Drive Programming Guide
Resulting
Z
actual
reference
X
Y
100 %
P 3-14
®
MG.11.CB.02 - VLT is a registered Danfoss trademark
3-15 Reference 1 Source
Option: Function:
Select the reference input to be used
for the first reference signal.
3-15 Reference 1 Source, 3-16 Reference
2 Source and 3-17 Reference 3 Source
define up to three different reference
signals. The sum of these reference
signals defines the actual reference.
This parameter cannot be adjusted
while the motor is running.
[0] No function
[1] Analog input 53
*
[2] Analog input 54
[7] Pulse input 29
[8] Pulse input 33
[20] Digital pot.meter
[21] Analog input X30/11
[22] Analog input X30/12
[23] Analog Input X42/1
[24] Analog Input X42/3
[25] Analog Input X42/5
[29] Analog Input X48/2
[30] Ext. Closed Loop 1
[31] Ext. Closed Loop 2
[32] Ext. Closed Loop 3
3-16 Reference 2 Source
Option: Function:
Select the reference input to be used
for the second reference signal.
3-15 Reference 1 Source, 3-16 Reference
2 Source and 3-17 Reference 3 Source
define up to three different reference
signals. The sum of these reference
signals defines the actual reference.
This parameter cannot be adjusted
while the motor is running.
[0] No function
[1] Analog input 53
[2] Analog input 54
[7] Pulse input 29
[8] Pulse input 33
[20] Digital pot.meter
*
[21] Analog input X30/11
[22] Analog input X30/12
[23] Analog Input X42/1
[24] Analog Input X42/3
[25] Analog Input X42/5
[29] Analog Input X48/2
[30] Ext. Closed Loop 1
[31] Ext. Closed Loop 2
[32] Ext. Closed Loop 3
3 3
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