Danfoss VLT AutomationDrive FC 301 Programming Manual page 71

Parameter Descriptions
3-12 Catch up/slow Down Value
Range: Function:
Digital Input), the percentage (relative) value is
deducted from the total reference. Obtain
extended functionality with the DigiPot
function. See parameter group 3-9* Digital
Potentiometer.
3-13 Reference Site
Option: Function:
Select which reference site to activate.
[0] Linked to Use local reference when in hand-on mode,
*
Hand / Auto or remote reference when in auto-on mode.
[1] Remote Use remote reference in both hand-on mode
and auto-on mode.
[2] Local Use local reference in both hand-on mode
and auto-on mode.
NOTICE
When set to [2] Local, the frequency
converter starts with this setting again
after a power-down.
3-14 Preset Relative Reference
Range: Function:
0 % [-100 The actual reference, X, is increased or decreased
- with the percentage Y, set in parameter 3-14 Preset
*
100 %] 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.
•
Parameter 8-02 Control Source.
Y
Relative
X
Z=X+X*Y/100
Illustration 3.22 Preset Relative Reference
MG33MO02
Programming Guide
Resulting
Z
actual
reference
Danfoss A/S © 01/2018 All rights reserved.
Z
-100 0
Illustration 3.23 Actual Reference
3-15 Reference Resource 1
Option: Function:
Select the reference input to be used for
the first reference signal.
Parameter 3-15 Reference Resource 1,
parameter 3-16 Reference Resource 2, and
parameter 3-17 Reference Resource 3
define up to 3 different reference signals.
The sum of these reference signals
defines the actual reference.
[0] No function
[1] Analog input 53
*
[2] Analog input 54
[7] Frequency input
29
[8] Frequency input
33
[11] Local bus Reference from terminals 68 and 69.
reference
[20] Digital pot.meter
®
[21] Analog input
VLT General Purpose I/O MCB 101
X30-11
[22] Analog input ®
VLT General Purpose I/O MCB 101
X30-12
3-16 Reference Resource 2
Option: Function:
Select the reference input to be used
for the 2
Parameter 3-15 Reference Resource 1,
parameter 3-16 Reference Resource 2,
and parameter 3-17 Reference Resource
3 define up to 3 different reference
signals. The sum of these reference
signals defines the actual reference.
[0] No function
[1] Analog input 53
[2] Analog input 54
[7] Frequency input
29
X
Y
100 %
P 3-14
nd reference signal.
69
3 3