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Setpoint generally denotes the desired value of a quantitative characteristic of a system from which the actual actual value should deviate as little as possible . The setpoint is specified by another system (e.g. technology, human). In the ideal case, the following applies: actual value = target value. The term is used in particular in the following specialist areas:

  • Automatic Control: In a control loop the set value which is the controlled variable , the instantaneous value of the guide variable . The designation setpoint is also used in place of the reference variable if the reference variable does not change over time. For example, the temperature is the controlled variable in heating. The desired temperature (reference variable) is specified by an adjustable temperature controller. The currently set temperature value is the setpoint.
According to DIN IEC 60050-351: 2009-06 International Electrotechnical Dictionary - Control Technology , the setpoint is defined as follows: "Desired value of a variable variable at a given point in time and under specified conditions"
  • Quality management: Analogous to the control technology, the desired process parameter (e.g. the dimensions of a component) is understood here as a setpoint. Until 1988, the term setpoints was blurred as a collective term for all specified characteristic values such as B. also limit dimensions are used.
  • Physiology, psychology and pedagogy: Analogous to control engineering, the target value here is the target value of systems with self-regulation . In medicine, the nominal value is also understood to be the normal value based on experience, even if there is no regulatory mechanism.

Individual evidence

  1. Erwin Samal, Wilhelm Becker: Floor plan of the practical control technology . 21st edition. Oldenbourg, Munich 2004, ISBN 978-3-486-27583-4 , pp. 21 ( limited preview in Google Book search).
  2. Holger Brüggemann, Peik Bremer: Basics of quality management: From tools to methods to TQM . Springer, Wiesbaden 2012, ISBN 978-3-8348-1309-1 , pp. 13 ( limited preview in Google Book search).
  3. setpoint. In: QZ-online. Hanser Verlag, November 25, 2011, accessed October 7, 2012 .
  4. ^ Dennis Bösch, Carl-Peter Criée: Lung function test: implementation - interpretation - diagnosis . 2nd Edition. Springer, Heidelberg 2009, ISBN 978-3-540-88038-7 , pp. 4 ( limited preview in Google Book search).