12 Configuration
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12.6.3 Controller self-optimization
Autotuning, also known as self-optimization (abbreviation: SO), determines the optimum con-
troller parameters for a PI or PID controller.
Setup dialog box
Parameters
Method
The standard method is the oscillation method, whereas the step response method is used
specifically in the plastics industry.
With the oscillation method, the output level is set alternately to 100 % and 0 %, which produc-
es oscillation of the control variable. With the step response method, a step of a specified size
Parameter Selection/settings
1
1
Bold: default setting
Description
Method Oscillation Oscillation method
Step response Step response method
Locking Enabled Autotuning can be started on the device
Disabled Autotuning is disabled
Output type 1, 2 Automatic Output level is recognized automatically.
Relay Output level is displayed using the relay...
Solid state, logic ... using the solid state relay or digital signal...
Analog ... using the analog output.
Standby output 0 to 100 %
Output level for step
method
0 to 30 to 100 % Output level step for step response method
Application of switch-
ing period (Cy)
Yes Cy is determined during autotuning
No Cy is not determined
Signal start/stop No selection
Digital selector
Start/stop signal for autotuning
Signal Locked No selection
Digital selector
Signal for locking autotuning
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