02/04/2015 - Dead time is the delay from when a controller output (CO) signal is issued until when the measured process variable (PV) first begins to respond. The presence of dead time,Өp, is never a good thing in a control loop. Dead time is something we mostly don't want to have in a control system. In the simplest of terms it is a delay in the response to a control action. So, there is a time lapse between the moment you apply the control action and the moment you see its effect on the process variable. Time delays or dead-times (DT's) between inputs and outputs are very common in industrial processes, engineering systems, economical, and biological . This paper presents a static control system of first- or second-order time lag with dead time element. We also show that a non-static system can be reduced to a. Dead times appear in many processes in industry and in other fields, in- cluding economical and biological systems. They are caused by some of the following . A first-order linear system with time delay is a common empirical description of many stable dynamic processes. The First Order Plus Dead Time (FOPDT) model . For detection systems that record discrete events, such as particle and nuclear detectors, the dead time is the time after each event during which the system is . IV.6 Problems with large dead time and/or inverse response. Feedback control systems with large dead time and/or inverse response cause immense problem .