Identify Solenoid Valves Energized or de-energized?
Sketch arrows next to each of the two solenoid valves showing the directions of air flow in the energized (E) and de-energized (D) states.
How Could FB and FC Make Me Professional PLC Programmer?
It’s really important to know that any Siemens PLC programmer can use the FB and FC program methods to design any plant logic or function.
PLC Switch Actuation Status
Determine the necessary PLC switch actuation status (i.e. low versus high process stimulus) to turn the yellow lamp on.
Free Download Programmable Logic Controller (PLC) Book
Download the free programmable logic controller book to study and learn about the basics of PLC programming.
Inspecting the Trends of PV and SP on a Process Chart Recorder
Inspecting the trends of PV and SP on a process chart recorder, you notice the poor quality of control loop.
Ferrules and Cross Ferruling
Ferrules are identification labels provided for every wire terminations in an instrument, equipment, and control panels.
Simple High Level Indicator Circuit
A potable water storage tank requires a high level alarm to warn operations personnel. Design a simple indicator circuit.
Filters in Compressors
An air filter is required to remove contaminants from the compressed air. The types of filters in compressors are air and oil.
Types of Circuit Breakers, Advantages, Disadvantages
Based on arc extinction, electrical circuit breakers are classified into four categories. Learn the principle, advantages, disadvantages.
Analytical Control System of Heat Exchanger Questions
Describe in detail the effect this heat exchanger problem will have on the performance of the analytical control system.
