
38
Figure 3.25 shows the effects of PID adjust-
ment on process response.
If the control performance using auto or self-
tuning is still unsatisfactory, the following
rules can be applied for further adjustment
of PID values:
3–20 Manual Tuning
In certain applications (very few), when using both self-tuning and auto-tuning to tune a process proves inadequate for the control
requirements, you can try manual tuning. Connect the controller to the process and perform the procedures according to the flow chart
shown in the following diagram.
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