Endress+Hauser Liquiline CA80SI, Руководство по эксплуатации

Страница: 75 / 172

Liquiline System CA80SI Operation
Hauser 75
10.5.1 Application examples
Chlorine regulation with feedforward control
CCA250
CA80
Flow, e.g. Promag53
A
BU
BK
BN
CCA250
INS
47
48
91
92
CA80
DIO
1
2
3
Dig.in
CA80: DIO
Dig.in: PFM
91
92
+
–
45
46
CA80
DIO
Dig.out: PFM
A0029239
 62 Example of chlorine control with feedforward control
1 Connection of the inductive proximity switch INS of CCA250 to the digital input of the DIO module
2 Connection of the signal from a flowmeter to the digital input of the DIO module
3 Activation of a (pulse) dosing pump via the digital output of the DIO module
A Dosing pump
Utilize the advantage of the effectively wear-free control with binary outputs versus a
control system with relay. With pulse frequency modulation (PFM), it is possible to achieve
virtually continuous dosing using a dosing pump with higher input frequency.
1. Connect the INS proximity switch of the CCA250 assembly to a digital input of the
DIO module (e.g. slot 6, port 1).
2. In the software, configure a controller and as the source select the binary input
(e.g. Binary input 1 ) to which the proximity switch is connected. ( Menu / Additional
functions / Controllers / Controller 1 / Controller enable = Binary input 1 )
3. Signal type : For the selected input, select the factory setting ( Static signal ).
4. Connect the measured value of a flowmeter to the second input of the DIO module
(e.g. slot 6, port 2).
5. Signal type : for this input, select PFM . ( Menu / Inputs / Binary input 6:2 / Signal
type = PFM )
6. Input variable : select the corresponding measured value ( Flow rate ).
 You can now use the input you have just configured as the disturbance variable
for your controller
1)
.
1) An activation code, Order No. 71211288, is necessary for the "feedforward control" function.