Slc Application Example - Danfoss VLT HVAC Drive FC 102 Design Manual

Application Examples
only event [1]) each scan interval. Only when event [1] is
evaluated TRUE, the SLC executes action [1] and starts
evaluating event [2].
It is possible to program from 0 to 20 events and actions.
When the last event/action has been executed, the
sequence starts over again from event [1]/action [1].
Illustration 6.4 shows an example with 3 events/actions:
6 6

6.1.7 SLC Application Example

One Sequence 1
Start – ramp up – run at reference speed 2 s – ramp down and hold shaft until stop.
Max. ref.
P 3-03
Preset ref.(0)
P 3-10(0)
Preset ref.(1)
P 3-10(1)
Term 18
P 5-10(start)
Illustration 6.5 SLC Example
Set the ramping times in 3-41 Ramp 1 Ramp Up Time and 3-42 Ramp 1 Ramp Down Time to the desired times
tacc × nnorm par . 1 − 25
tramp =
Set terminal 27 to No Operation (5-12 Terminal 27 Digital
Input)
1. 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%
2. Set preset reference 1 to second preset speed
(3-10 Preset Reference [1] Ex.: 0 % (zero).
3. Set the timer 0 for constant running speed in
13-20 SL Controller Timer [0]. Ex.: 2 sec.
162
Design Guide
State 2
State 1
2 sec
ref RPM
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Start
event P13-01
Stop
event P13-02
State 4
13-51.3
13-52.3
Illustration 6.4 Example of Events and Actions
State 3
4. Set Event 1 in 13-51 SL Controller Event [1] to True
[1]
5. Set Event 2 in 13-51 SL Controller Event [2] to On
Reference [4]
6. Set Event 3 in 13-51 SL Controller Event [3] to Time
Out 0 [30]
7. Set Event 4 in 13-51 SL Controller Event [4] to
False [0]
State 1
13-51.0
13-52.0
State 2
13-51.1
13-52.1
State 3
13-51.2
13-52.2
Stop
event P13-02
2 sec
Stop
event P13-02
MG16C202