B5: Pid Control - YASKAWA GA800 Technical Reference

12.3 b: Application
■
b4-06: Terminal M3-M4 OFF-Delay Time
No.
Name
(Hex.)
b4-06 Terminal M3-M4 OFF-Delay
Time
(0B33)
Expert
■
b4-07: Terminal M5-M6 ON-Delay Time
No.
Name
(Hex.)
b4-07 Terminal M5-M6 ON-Delay
Time
(0B34)
Expert
■
b4-08: Terminal M5-M6 OFF-Delay Time
No.
Name
(Hex.)
b4-08 Terminal M5-M6 OFF-Delay
Time
(0B35)
Expert
◆

b5: PID control

The drive has a PID control function. You can control drive output to adjust the proportional gain, integral time, and
derivative time that has an effect on the bias between the target value and the feedback value to match the target value
to the detected value. Use this function to adjust the drive output to accurately match the flow, pressure, and
temperature in the application match the target value.
Use a combination of controls to increase the performance:
• P control
P control has a proportional effect on the deviation. It outputs the product (the controlled output) proportional to the
deviation. You cannot use only the offset from P control to get to zero deviation.
• I control
I control is the integral of the deviation. It uses an integral value of the deviation to output the product (the
controlled output). I control helps align the feedback value and the target value. If you use only a proportional effect
(P control), it will cause and offset. Use a proportional effect with integral control, and the offset will disappear over
time.
• D control
D control is the derivative of the deviation. D control has an effect on drive output when there are sudden, large
changes in the deviation or feedback value. It quickly returns drive output to the value before the sudden change. It
multiplies a time constant by a derivative value of the deviation (slope of the deviation), and adds that result to PID
input to calculate the deviation of the signal, then it corrects the deviation.
Note:
D control has causes less stable operation because the noise changes the deviation signal. Use D control only when necessary.
■
PID Control Operation
Figure 12.34 shows PID control operation. The modified output (output frequency) changes when the drive uses PID
control to keep the deviation (the difference between the target value and the feedback value) constant.
744
V/f CL-V/f OLV CLV AOLV
Sets the delay time to deactivate the contact after the function set in H2-02 deactivates.
V/f CL-V/f OLV CLV AOLV
Sets the delay time to activate the contact after the function set in H2-03 activates.
V/f CL-V/f OLV CLV AOLV
Sets the delay time to deactivate the contact after the function set in H2-03 deactivates.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
YASKAWA SIEPC71061737D GA800 Drive Technical Reference
Default
(Range)
0 ms
(0 - 65000 ms)
Default
(Range)
0 ms
(0 - 65000 ms)
Default
(Range)
0 ms
(0 - 65000 ms)