Endress+Hauser Liquiline CA80SI, Руководство по эксплуатации

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Operation Liquiline System CA80SI
102 Hauser
Menu/Setup/Additional functions/Controller 1 ... 2
Function Options Info
Effective direction
Controller type = PID 1-sided
Selection
• Direct
• Reverse
Factory setting
Reverse
In what direction should the controller influence
the measured value?
• The measured value should increase as a
result of dosing (e. g. heating)
→
Reverse
• The measured value should decrease as a
result of dosing (e. g. cooling)
→
Direct
A 1
‐
sided controller has a unipolar manipulated variable, i. e. it can only influence the process in one direction.
Reverse : If the controller should increase the process value, set this as the direction of action. The controller
becomes active when the process value is too small (range A).
Direct : With this direction of action, the controller acts as a "downwards controller". It becomes active when the
process value (e. g. the temperature) is too high (range B).
y
+100 %
0 %
-100 %
w x
X
p
X
p
A
B
 74 Red: overlap between the curves of the two 1 ‐ sided controllers.
Controlled variable
Source of data Selection
• None
• Sensor inputs
• Current inputs
• Fieldbus signals
• Binary inputs
• Mathematical functions
Factory setting
None
‣
Specify the input or output which should be
the source of data for the controlled variable.
Measured value Selection
Depends on Source of data
Factory setting
None
‣
Specify the measured value that should be
your controlled variable.
You can use different measured values
depending on the data source.
Setpoint Target value of the controlled variable
This menu is not displayed if you selected a
fieldbus as the source (
Source of data =
fieldbus).
Setpoint Range of adjustment and
factory setting depending
on the
Source of data
‣
Specify the target value for the controlled
variable.
Tw
Setup Level = Advanced
0.0 to 999.9 s
Factory setting
2.0 s
Time constant for the set point damping filter
Disturbance variable

optional, activation code necessary