Controller having PID selection function
AssigneeYamatake Corporation
InventorHirohumi Hirayama
Life of this patent
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Abstract
A controller (1) has a fuzzy calculation means (64) for performing a fuzzy calculation in order to calculate a PID value (P, I, D) based on a switch time T, a PID value (P1, I1, D1) before switching of the PID value, and a PID value (P2, I2, D2) after the switching. The switch time T is obtained by manual through the switch time input means (7) or by calculating it automatically. The PID value (P1, I1, D1) is stored in a PID value storage means (62), and the PID value (P2, I2, D2) is stored in a PID value storage means (63).
Claims9
A controller having a PID selection function of performing PID calculation so that a measured value of an object system to be controlled is reached to a set value and calculating an operation value to be supplied to the object system based on the PID value calculated, comprising:
- PID set selection means selecting a set number of the PID value;
- and
- PID value determination means performing PID calculation in order to determine a PID value based on a current PID value of the set number currently selected by the PID set selection means, a previous PID value of the set number previously selected by the PID set selection means, and a switch time to switch the previous PID value to the current PID value.
Dependencies are inferred from the claim text.