X8 Instruction Set Reference Manual
20-2
PID Control
The PID Equation
The PID instruction can be expressed like (1) or (2) formula:
The formula adds following three actions:
• Proportional Action (P Action): calculate proportional values to current
deviation e.
• Integral Action (I Action): calculate proportional values to accumulated pas
deviation
• Derivative Action (D Action): calculate proportional values to the size of
deviation e
y = Detection
e = Deviation
K
P
= Proportional coefficient
= 0.01 ~ 327.67
T
I
= Integral time
= 327.67 ~ 0.01
T
D
= Derivative time
= 0.01 ~ 327.67
That is, PID control is configured following three elements and the basic
meaning of PID control is to find the optimal value considering past, current,
and future data.
• Integral Action (I Action): consider past data
• Proportional Action (P Action): consider current data
• Derivative Action (D Action): consider future data
Содержание X8 Series
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Страница 236: ...X8 Instruction Set Reference Manual 15 8 Shift and FIFO LIFO Instructions ...
Страница 242: ...X8 Instruction Set Reference Manual 16 6 Sequencing Instructions ...
Страница 252: ...X8 Instruction Set Reference Manual 18 4 Input and Output Instructions ...
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Страница 312: ...Appendix A 4 System Error Code ...
Страница 313: ...Appendix B MSG Instruction Error Code MSG Instruction Error Code ...
Страница 322: ...Appendix B 10 MSG Instruction Error Code ...
Страница 325: ...ASCII Character Set Appendix C 3 ...
Страница 326: ...Publication number X8 RM001A EN September 2012 ...
Страница 327: ...Copyright 2012 RS Automation Co Ltd All rights reserved ...