KROHNE OPTISENS AAC 050 EN - Manual (Page 20)

Manual OPTISENS AAC 050
OPTISENS AAC 050 20
5.3 P / PI controller as pulse-pause controller
Main menu
.
.
Set points and
controller versions
Set points Set point S1 You can choose
.
1.50 mg/l Controller settings different controller
.
P range S1 Pulse-Freq. S1 versions for S1 and S2.
0.20 mg/l 00*100/h
Integral time S1 Pulse-Freq. S2
000 sec. 00*100/h
Set point S2 Direction S1
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0.50 mg/l Raise
P range S2 Direction S2
0.20 mg/l Lower
Integral time S2 .
000 sec. .
Pulse + Pause The pulse+pause time
Basic settings 10 s Must be at least twice
Basic settings . Least Pulse As long as the least
Contr. settings 0.1 s Pulse time.
For a pulse-pause controller you have to set the following parameters:
1) Set points S1 and S2
S1 refers to relay 1, S2 refers to relay 2.
2) P range and integral action time
Adjust a P range > 0. For a P controller set integral time = 0, for a PI controller set an integral time > 0.
3) Pulse-frequencies for S1 and S2
Both frequencies must be set to 00, otherwise the controller will act as an impulse-frequency controller.
4) The acting direction for S1 and S2
Select „raise“ if the dosage raises the measured value.
Select „lower“ if the dosage lowers the measured value.
5) Pulse + pause time
Define a period of time during which the relay is proportionally to the control deviation ON (pulse) or OFF
(pause), respectively.
6) Least pulse time
Set a minimum pulse time that the relay has to at least remain open to allow the actuator to react.