6.1.7. SLC Application Example
One sequence 1:
Start – ramp up – run at reference speed 2 sec – ramp down and hold shaft until stop.
Set the ramping times in par. 3-41 and 3-42 to the wanted times
t
ramp
=
t
acc
×
n
norm
(
par
. 1
−
25)
∆
ref RPM
Set term 27 to
No Operation
(par. 5-12)
Set Preset reference 0 to first preset speed (par. 3-10 [0]) in percentage of Max reference speed
(par. 3-03). Ex.: 60%
Set preset reference 1 to second preset speed (par. 3-10 [1] Ex.: 0 % (zero).
Set the timer 0 for constant running speed in par. 13-20 [0]. Ex.: 2 sec.
Set Event 1 in par. 13-51 [1] to
True
[1]
Set Event 2 in par. 13-51 [2] to
On Reference
[4]
Set Event 3 in par. 13-51 [3] to
Time Out 0
[30]
Set Event 4 in par. 13-51 [1] to
False
[0]
Set Action 1 in par. 13-52 [1] to
Select preset 0
[10]
Set Action 2 in par. 13-52 [2] to
Start Timer 0
[29]
Set Action 3 in par. 13-52 [3] to
Select preset 1
[11]
Set Action 4 in par. 13-52 [4] to
No Action
[1]
6. Application Examples
VLT
®
HVAC Drive Design Guide
114
MG.11.B2.02 - VLT
®
is a registered Danfoss trademark
6
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