13 application examples – Lenze 8400 motec User Manual
Page 503
Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05
503
13
Application examples
13.1
Sequence control
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Process controller
L_PCTRL_1: Vp
1.0
Note!
Adapt control mode of the PID process
controller to the concrete application!
L_PCTRL_1: Tn
1000 ms
L_PCTRL_1: Kd
0.0
L_PCTRL_1: MaxLimit
105.0 %
Maximum level of pump 1.
L_PCTRL_1: MinLimit
0.0 %
No reversal of direction of the pump.
L_PCTRL_1: Operating mode
2: PID as setpoint
generator.
As PID input values, the process setpoint
(nSet_a) and the actual process value
(nAct_a) are used.
The speed setpoint (nNSet_a) is not con-
sidered.
LA_NCtrl: nPIDActValue_a
10: AIn1_Out
The actual process value (nAct_a) is de-
tected via the analog input 1.
(Actual process value = current water lev-
el)
LA_NCtrl: nPIDSetValue_a
20: nPar1_a
The process setpoint (nSet_a) is defined
LS_ParFree_a: Value 1
70.0 %
Selection of the process setpoint.
(Process setpoint = desired water level)
GP function "Analog comparison"
L_Compare_1: Fct.
6: |In1| < |In2|
Comparison operation:
|
| < |Actual speed value|
L_Compare_1: Hysteresis
95.0 %
Hysteresis for comparison
L_Compare_1: nIn1_a
21: nPar2_a
The comparison value 1 is selected via
the free parameter
.
L_Compare_1: nIn2_a
52: LA_NCtrl_
nMotorSpeedAct_a
Comparison value 2 is the actual speed
value.
• 100 % ≡ reference speed (
LS_ParFree_a: Value 2
100.0 %
Selection of the comparison value 1.
GP function "Binary delay element"
L_DigitalDelay_1: On delay
30 s
Switch-on delay for pump 2
L_DigitalDelay_1: Off delay
120 s
Switch-off delay for pump 2
L_DigitalDelay_1: bIn
215:
L_Compare1_bOut
Input value of the delay element is the re-
sult of comparison.
Parameter
Info
Setting
Info