8630 - 7
CONTENTS
GENERAL RULES
Selection criteria for continuous valves .......................................................................................................................................................... 158
Characteristics of PID controllers............................................................................................................................................................................. 160
P component
............................................................................................................................................................................................................................................ 160
I component
.............................................................................................................................................................................................................................................. 161
D component
............................................................................................................................................................................................................................................ 162
Superimposing the P, I and D components
............................................................................................................................................................... 163
Function of a real PID controller
........................................................................................................................................................................................... 164
Rules for setting PID controllers ................................................................................................................................................................................ 165
Setting rules of Ziegler and Nichols (oscillation method)
............................................................................................................................ 165
Setting rules of Chien, Hrones and Reswick (controller output step method)
........................................................................ 166
OPERATING STRUCTURE
Operating structure of the TOP Control Continuous..................................................................................................................... 170
TABLE FOR POSITIONER
Table for noting your settings on the positioner .................................................................................................................................. 178
TABLE FOR PROCESS CONTROLLER
Tables for noting your settings on the process controller ..................................................................................................... 180
MASTER CODE
Code number .......................................................................................................................................................................................................................................... 182
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