Figure 4.5 Ramp-up/Ramp-down
Set the ramping times in 3-41 Ramp 1 Ramp-up Time and 3-42 Ramp 1 Ramp-down Time to the desired times
t
ramp
=
t
acc
× n
norm
par . 1 − 25
ref RPM
Set terminal 27 to [0] No Operation (5-12 Terminal 27 Digital Input)
Set preset reference 0 to
rst preset speed (3-10 Preset Reference [0]) in percentage of maximum reference speed
(3-03 Maximum Reference). Example: 60%
Set preset reference 1 to second preset speed (3-10 Preset Reference [1] Example: 0% (zero).
Set the timer 0 for constant running speed in 13-20 SL Controller Timer [0]. Example: 2 s
Set Event 1 in 13-51 SL Controller Event [1] to [1] True.
Set Event 2 in 13-51 SL Controller Event [2] to [4] On Reference.
Set Event 3 in 13-51 SL Controller Event [3] to [30] Time Out 0.
Set Event 4 in 13-51 SL Controller Event [4] to [0] False.
Set Action 1 in 13-52 SL Controller Action [1] to [10] Select preset 0.
Set Action 2 in 13-52 SL Controller Action [2] to [29] Start Timer 0.
Set Action 3 in 13-52 SL Controller Action [3] to [11] Select preset 1.
Set Action 4 in 13-52 SL Controller Action [4] to [1] No Action.
Set the in 13-00 SL Controller Mode to ON.
Start/stop command is applied on terminal 18. If the stop signal is applied, the adjustable frequency drive ramps down and
goes into free mode.
Application Examples Design Guide
MG20N622 Danfoss A/S © 09/2014 All rights reserved. 105
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