2704 Controller User Manual
Part No HA026933 Issue 9.0 Nov-13 5
11.4.7 Analogue Value.................................................................................................................................................................. 144
11.5 GAIN SCHEDULING ................................................................................................................................... 145
11.5.1 To Configure Gain Scheduling:- ..................................................................................................................................... 146
11.5.2 PID Parameters ................................................................................................................................................................... 146
11.5.3 PID (Aux) Parameters ........................................................................................................................................................ 148
11.6 OUTPUT PARAMETERS ............................................................................................................................. 149
11.6.1 Table of Output Parameters ............................................................................................................................................ 149
11.7 MOTORISED VALVE CONTROL ............................................................................................................... 150
11.7.1 Motor Parameters .............................................................................................................................................................. 150
11.8 DIAGNOSTICS ........................................................................................................................................... 151
11.8.1 Diagnostic Page ................................................................................................................................................................. 151
11.9 DISPLAY ...................................................................................................................................................... 152
11.9.1 Display Page ....................................................................................................................................................................... 152
11.10 CASCADE CONTROL ........................................................................................................................... 153
11.10.1 Overview ............................................................................................................................................................................. 153
11.10.2 Full Scale Cascade Mode ................................................................................................................................................. 153
11.10.3 Trim Mode .......................................................................................................................................................................... 154
11.10.4 Auto/Manual Operation in Cascade ............................................................................................................................... 154
11.10.5 Cascade Controller Block Diagrams .............................................................................................................................. 155
11.10.6 LOOP SETUP (Wiring page) for Cascade Loop ............................................................................................................ 156
11.10.7 Cascade Parameters ......................................................................................................................................................... 157
11.10.8 Cascade Wiring Example ................................................................................................................................................. 158
11.11 RATIO CONTROL .................................................................................................................................. 159
11.11.1 Overview ............................................................................................................................................................................. 159
11.11.2 Basic Ratio Control ............................................................................................................................................................ 159
11.11.3 Controller Configured For Ratio ..................................................................................................................................... 160
11.11.4 Ratio Parameters ................................................................................................................................................................ 161
11.11.5 Ratio Wiring Example ........................................................................................................................................................ 162
11.12 OVERIDE CONTROL ............................................................................................................................. 163
11.12.1 Overview ............................................................................................................................................................................. 163
11.12.2 Simple Override ................................................................................................................................................................. 163
11.12.3 Sensor Break Action .......................................................................................................................................................... 164
11.12.4 Sensor Break Type = Output (0) ...................................................................................................................................... 164
11.12.5 Sensor Break Type = Hold (1) .......................................................................................................................................... 164
11.12.6 Issues with Sensor Break .................................................................................................................................................. 164
11.12.7 Downscale .......................................................................................................................................................................... 164
11.12.8 Upscal e ................................................................................................................................................................................ 164
11.12.9 Controller Configured For Override .............................................................................................................................. 165
11.12.10 Override Parameters ................................................................................................................................................... 166
11.12.11 Override Wiring Example ........................................................................................................................................... 167
11.13 LOOP2 SET UP ...................................................................................................................................... 168
11.14 LOOP3 SET UP ...................................................................................................................................... 168
12. CHAPTER 12 TUNING ............................................................................................................. 169
12.1 WHAT IS TUNING ...................................................................................................................................... 169
12.2 AUTOMATIC TUNING ............................................................................................................................... 169
12.2.1 One-shot Tuning ................................................................................................................................................................ 169
12.3 TO AUTOTUNE CONTOL LOOP
LP1
....................................................................................................... 170
12.3.1 Carbon Potential Control ................................................................................................................................................. 171
12.3.2 Autotune Parameters ........................................................................................................................................................ 172
12.3.3 To View the State of Autotune ......................................................................................................................................... 172
12.4 MANUAL TUNING ..................................................................................................................................... 173
12.4.1 Setting the cutback values ............................................................................................................................................... 173
12.4.2 Integral action and manual reset .................................................................................................................................... 174
12.4.3 Valve Position Control ....................................................................................................................................................... 174
12.5 TUNING WHEN GAIN SCHEDULING IS USED ........................................................................................ 175
12.5.1 Tuning Procedure .............................................................................................................................................................. 175
12.6 CASCADE TUNING .................................................................................................................................... 176
12.6.1 To Tune a Full Scale Cascade Loop ................................................................................................................................ 177
12.6.2 To Tune a Trim mode Cascade Loop ............................................................................................................................. 178
13. CHAPTER 13 CONTROLLER APPLICATIONS ...................................................................... 180
13.1 ZIRCONIA - CARBON POTENTIAL CONTROL ........................................................................................ 181
13.1.1 Temperature Control ........................................................................................................................................................ 181
13.1.2 Carbon Potential Control ................................................................................................................................................. 181
13.1.3 Sooting Alarm .................................................................................................................................................................... 181
13.1.4 Automatic Probe Cleaning ............................................................................................................................................... 181
13.1.5 Endothermic Gas Correction ........................................................................................................................................... 181
13.1.6 Example of Carbon Potential Controller Connections ................................................................................................ 182
13.2 TO VIEW AND ADJUST ZIRCONIA PARAMETERS ................................................................................. 183
13.2.1 Zirconia Parameters........................................................................................................................................................... 183
13.2.2 Wiring Page ........................................................................................................................................................................ 185
13.3 ZIRCONIA WIRING EXAMPLE ................................................................................................................... 185
13.3.1 The Zirconia Function Block............................................................................................................................................. 185
13.3.2 Configuration of a Carbon Potential Control Loop ...................................................................................................... 186