Temperature Controller - Staveb AG

Configuration and Basic Operation 3-21Once the self-tuning PID constants have been calculated, ST is not executedduring the next control operation cycle as long as the set point remainsunchanged.Example Operation Procedure — Execute Self-Tuning (ST)ST (self-tuning) is executed when the ST parameter is set to ON in the InitialSetting function group.When the ST function is in operation, make sure to turn the power supply ofthe load connected to the control output (MV) ON simultaneously with orbefore starting operation of the Bulletin 900-TC32.1. Press the key for at least 3 seconds to move from the Operationfunction group to the Initial Setting function group.Figure 3.38Initial setting function groupInput type2. Select the ST parameter by pressing the M key.3. Press the U key to select on. Note: The default is on.Figure 3.394. To return to the Operation function group, press the key. Thetemperature display blinks during self-tuning (ST) execution and stopswhen it is complete.Figure 3.40STNote: The newly configured value or parameter is loaded into controllermemory if you do not operate any key on the front panel for at least 2 secondsor by pressing the or M key.Conditions that Start Self-Tuning (ST)Self-tuning by Step Response Tuning (SRT) is started when either of the twofollowing major conditions are met:• Program execution is started.• The set point is changed.Publication 900-UM003C-EN-E - January 2004