Using Distributed Control System Diagrams

 After this lesson, you will be able to describe the basic symbols and parts of a logic diagram. You will also be able to explain how to use a DCS logic diagram as a troubleshooting tool. • Identify basic logic symbols used in logic diagrams • List the parts of a drawing title block • Explain the purpose of a drawing legend • Discuss permissives and interlocks associated with control systems • Describe how a control loop maintains a parameter at its control setpoint • Discuss the use of trip setpoints • Describe how the feedback function in a control loop helps keep processes stable • Describe trim and bias control logic features • Discuss general troubleshooting steps and techniques