Lesson 2 - Principles of Process Control
This lesson explores exactly what process control is and explains why it is important. It examines the various levels within process control systems and identifies the associated equipment. It also takes a detailed look at the various automation communication and control elements.
Equipment
There are many different symbols that represent the various equipment. As we are focussing more on the control than the process itself, we will not go into too much detail. Equipment symbols tend to clearly indicate what they are representing. Therefore, if you can understand roadside signs, you should be able to interpret equipment symbols.
The figure below shows some of these symbols:
Figure: Common equipment (vessels, pumps, compressors, and fans)
Let us now look at the control symbols, as these tell us the most from a control perspective.