Danfoss VLT Refrigeration Drive FC 103 Design Manual page 96

Application Examples
Max. ref.
P 3-03
Preset ref.(0)
P 3-10(0)
4 4
Preset ref.(1)
P 3-10(1)
Term 18
P 5-10(start)
Illustration 4.4 Ramp Up/Ramp Down
Set the ramping times in parameter 3-41 Ramp 1 Ramp Up Time and parameter 3-42 Ramp 1 Ramp Down Time to the desired
times.
t × n
acc
t =
ramp
Set terminal 27 to [0] No Operation (parameter 5-12 Terminal 27 Digital Input)
Set preset reference 0 to first preset speed (parameter 3-10 Preset Reference [0]) in percentage of maximum reference speed
(parameter 3-03 Maximum Reference). Example: 60%
Set preset reference 1 to the second preset speed (parameter 3-10 Preset Reference [1] Example: 0% (zero).
Set the timer 0 for constant running speed in parameter 13-20 SL Controller Timer [0]. Example: 2 s
Set Event 1 in parameter 13-51 SL Controller Event [1] to [1] True.
Set Event 2 in parameter 13-51 SL Controller Event [2] to [4] On Reference.
Set Event 3 in parameter 13-51 SL Controller Event [3] to [30] Time Out 0.
Set Event 4 in parameter 13-51 SL Controller Event [4] to [0] False.
Set Action 1 in parameter 13-52 SL Controller Action [1] to [10] Select preset 0.
Set Action 2 in parameter 13-52 SL Controller Action [2] to [29] Start Timer 0.
Set Action 3 in parameter 13-52 SL Controller Action [3] to [11] Select preset 1.
Set Action 4 in parameter 13-52 SL Controller Action [4] to [1] No Action.
Set the in parameter 13-00 SL Controller Mode to ON.
Start/stop command is applied on terminal 18. If the stop signal is applied, the frequency converter ramps down and goes
into free mode.
94
VLT
State 2
State 1
2 sec
par . 1 − 25
norm
ref RPM
Danfoss A/S © 08/2015 All rights reserved.
®
Refrigeration Drive FC 103
State 3
2 sec
MG16G202