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
tramp =
tacc × nnorm (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
6
6
