Chapter 4 Parameters|
4-160 Revision Jan. 2009, 06EE, SW--PW V1.12/CTL V2.12
When Pr.10.01= to 0 or 2 (Positive feedback): Error (Err) =feedback(FB)- setpoint(SP) When
the feedback will be decreased by the increasing output frequency, please use this setting.
Select input terminal accordingly. Make sure this parameter setting does not conflict with the
setting for Pr.10.00 (Master Frequency).
Related parameters: Pr.00.04 Content of Multi-function Display (set to 5 Display PID analog
feedback signal value (b) (%)), Pr. 10.11(Source of PID Set point) and Pr.04.19(ACI/AVI2
Selection)
10.11 Source of PID Set point Unit: 0.01
Settings 0.00 to 600.0Hz Factory Setting: 0.00
This parameter is used in conjunction with Pr.10.00 set 4 to input a set point in Hz.
10.02 Proportional Gain (P) Unit: 0. 1
Settings 0.0 to 10.0 Factory Setting: 1.0
It is used to eliminate the system error. It is usually used to decrease the error and get the
faster response speed. But if setting too large value in Pr.10.02, it may cause the system
oscillation and instability.
It can be used to set the proportional gain to decide the responds speed. The larger value is
set in Pr.10.02, the faster response it will get. The smaller value is set in Pr.10.02, the slower
response it will get.
If the other two gains (I and D) are set to zero, proportional control is the only one effective.
Related parameters: Pr.10.03(Integral Time (I)) and Pr.10.04(Differential Control (D))
10.03 Integral Time ( I ) Unit: 0.01
Settings 0.00 to 100.0 sec Factory Setting: 1.00
0.00 Disable
The integral controller is used to eliminate the error during stable system. The integral control
doesn’t stop working until error is 0. The integral is acted by the integral time. The smaller
integral time is set, the stronger integral action will be. It is helpful to reduce overshoot and
oscillation to make a stable system. At this moment, the decreasing error will be slow. The
integral control is often used with other two controls to become PI controller or PID controller.
This parameter is used to set the integral time of I controller. When the integral time is long, it
will have small gain of I controller, the slower response and bad external control. When the
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