Toshiba VF-FS1 instruction manual  P-gain adjustment parameter,  I-gain adjustment parameter

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H (P-gain adjustment parameter)

This parameter adjusts the proportional gain level during PID control. A correction value proportional to the particular deviation (the difference between the set frequency and the feedback value) is obtained by multiplying this deviation by the parameter setting.

A larger P-gain adjustment value gives faster response. Too large an adjustment value, however, results in an unstable event such as hunting.

Feedback amount

Fast response

(H = Large gain)

Process quantity setting value

Slow response (H = Small gain)

Time

H (I-gain adjustment parameter)

This parameter adjusts the integral gain level during PID control. Any deviations remaining unremoved during proportional action are cleared to zero (residual deviation offset function).

A larger I-gain adjustment value reduces residual deviations. Too large an adjustment value, however, 6 results in an unstable event such as hunting.

Feedback amount

(H = Small gain)

Process quantity

setting value

(H = Large gain) Residual deviation

Time

+If one of input terminals is assigned input terminal function 65 (PID control integral value clear), integral value is always 0 (zero) during the input terminal on.

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