| 摘要 |
A process controller comprises a deviation calculating device for calculating the deviation between a control value obtained from a controlled object and a set value for the control value, and a first operation device for performing at least one of proportional, integral and differential operations with respect to the deviation from the deviation calculating device based on control parameters adjusted in a characteristic state for optimally restricting variation due to a disturbance. The first operation device outputs an adjusting signal based on the at least one of proportional, integral and differential operations. The process controller further comprises a second calculating device for correcting the control parameters to parameter values in a characteristic state for optimally following change in the set value.
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