Omron CX-Process Tool, Руководство по введению

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C
C
T
fr
e
w
U
s
t
w
f
1
Execute fine tuning (FT) when the control performance produced by
autotuning is not acceptable, when autotuning produces instability in
the PV, or when interruption of control cannot be allowed.
Fine tuning improves control by automatically setting PID constants
using three user settings listed below along with fuzzy logic applied to
the previous control conditions.
•
Hunting
•
Overshooting
•
Responsiveness
Either one or two of the user settings can be set to any of five adjust-
ment levels. For example, to improve control responsiveness and
overshooting, the
Responsiveness
and
Hunting
parameters can be
set to the desired levels.
●
Fine Tuning (FT)
PID
Tuning
Autotuning is provided as a convenient means for tuning PID control.
To perform autotuning, click the
AT Button. The PID constants will be
tuned when autotuning is started.
The following figure shows an example of AT execution and the re-
sponse of the subsequent temperature control loop. Compared with
the response example on the previous page, temperature settings are
changed faster.
Reference Information
●
Autotuning (AT)
C
to
U U
Creating Simple Function Block Data for
the Loop Controller