Operating Instructions

Descriptions of Parameter Settings

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Fig. 93:

Pr.00-04 = 10 (display PID feedback (b) (%))

Pr.01-12 Acceleration Time is set according to actual conditions.

Pr.01-13 Deceleration Time is set according to actual conditions.

Pr.00-21 = 0, operate through the digital keypad

Pr.00-20 = 0, the digital keypad controls the setpoint.

Pr.08-00 = 1 (negative PID feedback from analog input)

ACI analog input Pr.03-01 = 5, PID feedback signal.

Pr.08-01-08-03 is set according to actual conditions.

If there is no oscillation in the system, increase Pr.08-01 (Proportional Gain (P))

If there is no oscillation in the system, decrease Pr.08-02 (Integral Time (I))

If there is no oscillation in the system, increase Pr.08-03 (Differential Time (D))

Refer to Pr.08-00–08-21 for PID parameter settings.

Pr.

Explanation

Settings

Default

08-01

Proportional gain (P)

0.0 to 1000.0 (When Pr.08-23 bit 1=0)

0.00 to 100.00 (When Pr.08-23 bit 1=1)

1.00

1.0: Kp gain is 100%; if the setting is 0.5, Kp gain is 50%.

Sets the proportional gain to determine the deviation response speed. The higher the proportional gain, the faster

the response speed. Eliminates the system deviation; usually used to decrease the deviation and get faster

response speed. If you set the value too high, overshoot occurs and it may cause system oscillation and instability.

If you set the other two gains (I and D) to zero, proportional control is the only effective parameter.

Pr.

Explanation

Settings

Default

08-02

Integral time (I)

0.00 to 100.00 sec.

1.00