12 Configuration
86
Start of autotuning
Autotuning can be started using any signal from the digital selector. Any other signal from the
digital selector can be used to abort (stop) autotuning.
Optimization according to the oscillation method
In the case of a major control deviation between the setpoint value and actual value (for exam-
ple, in the startup phase), the controller determines a switching line around which the control
variable performs a forced oscillation during autotuning. The switching line is determined so
that the actual value does not exceed the setpoint value if possible.
In the case of a minor control deviation (for example, if the control loop is in a steady state dur-
ing operation), oscillation is forced around the setpoint value. Here, the setpoint value is ex-
ceeded in any case.
The controller automatically chooses between two procedures depending on the extent of the
control deviation:
NOTE!
The optimization must be performed under genuine operating conditions and requires a
closed control loop, whose actuator influences the actual value (e.g. heating controlled by re-
lay output). It can be performed as many times as required.
Autotuning during the startup phase Autotuning during operation
x Actual value w Setpoint value
S Switching line t1 Start of autotuning
To Next Page
Loading...
