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Basic Examples of PID Control
Section
5-1
153
5-1-2
Multi-channel PID Control
Function blocks used: Basic PID (Block Model 011)
Constant ITEM Setting (Block Model 171)
Step Ladder Program (Block Model 301)
Use the Field I/O Terminal blocks (AI 8-point/AO 8-point Terminal blocks,
etc.) as the analog input/outputs.
PID
PV
MV
PID
PV
MV
Local Set
Point value
PID
PV
MV
Local Set
Point value
Local Set
Point value
A I 8 - p o in t
Te r min a l
B lo c k
Mo d e l 5 5 1
PV
B a s ic PID
B lo c k Mo d e l 0 1 1
A n a lo g in p u t
MV
A n a lo g in p u t
PV
B a s ic PID
B lo c k Mo d e l 0 1 1
A O 8 - p o in t
Te r min a l
B lo c k
Mo d e l 5 5 2
A n a lo g o u tp u t
A n a lo g o u tp u t
Co n s ta n t ITEM S e ttin g
B lo c k Mo d e l 1 7 1
L S P
Dif f e r e n tia l c o n ta c t
S te p L a d d e r
Pr o g r a m
B lo c k Mo d e l 3 0 1