Table of Contents Mini8 Controller
12 HA028581 Issue 20
Cooling Algorithm..................................................................................... 214
Gain Scheduling....................................................................................... 215
PID Parameters ....................................................................................... 216
Tuning Function Block.................................................................................... 216
Loop Response........................................................................................ 217
Initial Settings........................................................................................... 217
Other Considerations......................................................................... 218
Multi-zone applications ............................................................................ 219
Automatic Tuning ..................................................................................... 219
Tune Parameters ..................................................................................... 220
To Auto Tune a Loop - Initial Settings ...................................................... 220
To Start Autotune ..................................................................................... 221
Autotune and Sensor Break..................................................................... 221
Autotune and Inhibit ................................................................................. 221
Autotune and Gain Scheduling ................................................................ 221
Autotune from Below SP – Heat/Cool...................................................... 222
Examples: .......................................................................................... 222
Autotune From Below SP – Heat Only..................................................... 223
Autotune at Setpoint – Heat/Cool ............................................................ 224
Unsuccessful Autotune Modes................................................................. 224
Manual Tuning ......................................................................................... 225
Manually Setting Relative Cool Gain ....................................................... 225
Manually Setting the Cutback Values ...................................................... 226
Setpoint Function Block ................................................................................. 227
Setpoint Function Block ........................................................................... 227
SP Tracking.............................................................................................. 227
Manual Tracking....................................................................................... 228
Rate Limit................................................................................................. 228
Setpoint Parameters ................................................................................ 229
Setpoint Limits ......................................................................................... 230
Setpoint Rate Limit................................................................................... 230
Setpoint Tracking ..................................................................................... 231
Manual Tracking....................................................................................... 231
Output Function Block.................................................................................... 232
Output Limits............................................................................................ 234
Output Rate Limit ..................................................................................... 234
Sensor Break Mode ................................................................................. 235
Forced Output .......................................................................................... 235
Feedforward............................................................................................. 236
Effect of Control Action, Hysteresis and Deadband ................................. 236
Setpoint Programmer ................................................................. 238
Introduction to Setpoint Programmer ............................................................. 238
Time to Target Programmer ..................................................................... 238
Ramp Rate Programmer.......................................................................... 239
Mini8 Controller Programmer Block(s) ........................................................... 239
Segment Types .............................................................................................. 239
Ramp ....................................................................................................... 239
Dwell ........................................................................................................ 240
Step.......................................................................................................... 240
Time ......................................................................................................... 240
GoBack .................................................................................................... 240
Wait.......................................................................................................... 241
End........................................................................................................... 241
Output Events ................................................................................................ 242
Digital Events ........................................................................................... 242
PV Event & User Value ............................................................................ 243
Time Event............................................................................................... 243
Holdback ........................................................................................................ 246
‘Guaranteed Soak’ ................................................................................... 246
PID Select ...................................................................................................... 247
Program Cycles.............................................................................................. 247
Servo........................................................................................................ 247