Comparison of Control Loops – Open, Closed, Cascade, Feedforward, Ratio
Control loops are the building blocks of control systems and come in various configurations such as open, closed, cascade, feedforward, ratio.
Control Loop Principle
4–20 mA Process Control Loops
In electrical signalling an analog current loop is used where a device must be monitored or controlled remotely over a
Feedback Control Principle
Before we begin our discussion on process control, we must define a few key terms. First, we have what is