Endress+Hauser Liquiline System CA80HA, Operating Instructions Manual

Page: 126 / 214

Operation Liquiline System CA80HA
126 Hauser
Configuration
Make the following decisions to configure a controller:
• (1) What type of process can your process be assigned to? → Process type
• (2) Should it be possible to influence the measured variable (controlled variable) in one
direction or in both directions? One-sided or two-sided controller, → Controller type
• (3) What should be the controlled variable (sensor, measured value)? → Controlled
variable
• (4) Do you have a disturbance variable that should be active at the controller output? →
Disturbance variable
• (5) Specify the parameters for the controller:
• Set point, → Setpoint
• Neutral zone, → Xn
• Proportional band, → Xp
• Integral action time (I-value), → Tn
• Derivative action time (D-value), → Tv
• (6) What should the controller do in the event of a hold (measured error, sensor
replacement, cleaning etc.)?
• Pause or continue with dosing? → Hold behavior / Manipulated Variable
• At the end of a hold, continue or restart the control loop (affects I ‐ value)? → Hold
behavior / State
• (7) How should the actuator be triggered?
• U : assign this setting to the output for an actuator which can increase the
measured value.
• Unipolar- : assign this setting to the output for an actuator which can decrease the
measured value.
• Bipolar : select this setting if you want to output the manipulated variable via one current
output only (split range).
• (8) Configure the outputs and switch on the controller.