Danfoss VLT - SLC Application Example

sequence starts over again from event [1] / action [1]. The
illustration shows an example with three events / actions:
Illustration 6.4
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.
Illustration 6.5
Set the ramping times in 3-41 Ramp 1 Ramp Up Time and
3-42 Ramp 1 Ramp Down Time to the wanted times
t
ramp
=
t
acc
× n
norm
(
par . 1 − 25
)
ref RPM
Set term 27 to No Operation (5-12 Terminal 27 Digital Input)
Set Preset reference 0 to first preset speed (3-10 Preset
Reference [0]) in percentage of Max reference speed
(3-03 Maximum Reference). Ex.: 60%
Set preset reference 1 to second preset speed (3-10 Preset
Reference [1] Ex.: 0 % (zero).
Set the timer 0 for constant running speed in 13-20 SL
Controller Timer [0]. Ex.: 2 sec.
Set Event 1 in 13-51 SL Controller Event [1] to True [1]
Set Event 2 in 13-51 SL Controller Event [2] to On Reference
[4]
Set Event 3 in 13-51 SL Controller Event [3] to Time Out 0
[30]
Set Event 4 in 13-51 SL Controller Event [4] to False [0]
Set Action 1 in 13-52 SL Controller Action [1] to Select preset
0 [10]
Set Action 2 in 13-52 SL Controller Action [2] to Start Timer
0 [29]
Set Action 3 in 13-52 SL Controller Action [3] to Select preset
1 [11]
Application Examples
VLT
®
Refrigeration Drive Design Guide
84 MG16G102 - VLT
®
is a registered Danfoss trademark
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