Industrial Control Systems - Instrumentation Tools

Why Bias used in Proportional Controller ?

The P-Only Algorithm The P-Only controller computes a CO action every loop sample time T as: CO = CObias

Split-range control is used when a single controller is employed to control two final-control elements (two valves for example). In

First we have to know how offset error appears in Proportional controller. Click here to read the article on proportional

Proportional controller: With proportional band, the controller output changes in “proportion” to the error between process variable and set point.

The PID controller plays a major role in controlling the process parameters in process industries. It consists of Proportional term,

Setpoint Tracking (also called PV tracking): PV Tracking is An option on many controllers. When a control loop is in

Bumpless Transfer Bumpless transfer is either a manual or automatic transfer procedure used when switching a PID controller from auto

Feedback control Feedback control is an important technique that is widely used in the process industries. Its main advantages are

The below figure 1 shows a typical control scheme with two controllers driving the same control valve via high select

A very common control scheme is split range control in which the output of a controller is split to two