Operation Liquiline CM44P
96 Endress+Hauser
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
2)
.
7. Disturbance variable: in the controller menu, select the binary input to which you
have connected the flow measured value. (Menu/Additional functions/Controllers/
Controller 1/Disturbance variable/Source of data = Binary input 6:2 and
Measured value = PFM value)
8. You can activate a dosing pump through PFM via a digital output of the DIO module.
Connect the pump to an output of the DIO module (e.g. slot 6, port 1) and select the
following settings in the menu: Menu/Outputs/Binary output 6:1/Signal type =
PFM and Source of data = Controller 1.
Take the direction of action of your dosing into account. Select the correct parameter
(Actuator type = Unipolar+ or Unipolar-).
You must make additional settings in the controller menu to fully customize the control to
suit your process conditions.
CM44x as the cleaning master
CM44x / CM44xR
47
48
91
92
1 2
3
Dig.in
CM44x / CM44xR
CM44x / CM44xR
A0028320
85 Example of a central cleaning control
1 External cleaning trigger at the binary input
2 Transferring the external hold over binary output to other measuring devices without connected cleaning
functions
3 Transferring the cleaning trigger over a binary output to other self-cleaning measuring points
1. An external trigger actuates a cleaning operation at the master.
A cleaning unit is connected via a relay or a binary output, for example.
2) An activation code, Order No. 71211288, is necessary for the "feedforward control" function.
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