DL205 User Manual, 4th Edition, Rev. D
xiii
Table of Contents
Parallel Processes 7–19
Converging Processes 7–19
Convergence Stages (CV) 7–19
Convergence Jump (CVJMP) 7–20
Convergence Stage Guidelines 7–20
Managing Large Programs 7–21
Stage Blocks (BLK, BEND) 7–21
Block Call (BCALL) 7–22
RLL
PLUS
(Stage) Instructions 7–23
Stage (SG) 7–23
Initial Stage (ISG) 7–24
Jump (JMP) 7–24
Not Jump (NJMP) 7–24
Converge Stage (CV) and Converge Jump (CVJMP) 7–25
Block Call (BCALL) 7–27
Block (BLK) 7–27
Block End (BEND) 7–27
Stage View in DirectSOFT 7–28
Questions and Answers about Stage Programming 7–29
Chapter 8: PID Loop Operation 8–1
DL250-1 and DL260 PID Loop Features 8–2
Main Features 8–2
Introduction to PID Control 8–4
Why use PID Control? 8–4
Introducing DL205 PID Control 8–6
Process Control Definitions 8–8
PID Loop Operation 8–9
Position Form of the PID Equation 8–9
Reset Windup Protection 8–10
Freeze Bias 8–11
Adjusting the Bias 8–11
Step Bias Proportional to Step Change in SP 8–12
Eliminating Proportional, Integral or Derivative Action 8–12
Velocity Form of the PID Equation 8–12
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