Manufacturing Process Automation Flashcards

Which communication protocol is most commonly used for real-time data exchange between PLCs and SCADA systems in industrial environments?

Answer: Modbus TCP

Modbus TCP is a widely adopted industrial protocol for real-time communication between PLCs and SCADA systems due to its simplicity and reliability.

In a flexible manufacturing system (FMS), what is the primary role of the material handling system?

Answer: Transporting workpieces between workstations

The material handling system in an FMS moves workpieces between workstations automatically, enabling continuous and flexible production flow.

What does the term 'dead band' refer to in process control systems?

Answer: A range of input values that produce no change in controller output

Dead band is the range of error values within which the controller takes no corrective action, preventing unnecessary actuator cycling.

Which type of robot configuration offers the largest and most irregular work envelope?

Answer: Articulated (revolute) robot

Articulated robots with multiple rotary joints can reach around obstacles and access complex spatial positions, giving them the largest and most irregular work envelopes.

In automated optical inspection (AOI), which imaging technique is commonly used to detect surface defects on printed circuit boards?

Answer: 2D grayscale or color vision with pattern matching

AOI systems typically use 2D camera-based vision with grayscale or color imaging and pattern matching algorithms to detect solder defects, missing components, and misalignments on PCBs.

What is the primary advantage of using servo motors over stepper motors in precision motion control applications?

Answer: Closed-loop feedback enabling higher accuracy at high speeds

Servo motors use closed-loop feedback (encoders) to continuously correct position, maintaining accuracy even under varying loads and high speeds.

Which lean automation concept focuses on stopping a production line automatically when a defect is detected?

Answer: Jidoka (autonomation)

Jidoka, or autonomation, is the Toyota principle of building in intelligence to detect abnormalities and stop the line automatically to prevent defect propagation.