Sequential Function Chart
Sequential Function Chart (SFC) is a visual way to show how machines and industrial processes should work, step by step. Think of it like a flowchart that automation engineers use to program industrial equipment. It's part of a standard programming method used in factories and manufacturing plants. When someone lists SFC on their resume, it means they know how to create and read these charts to control automated systems. It's similar to other industrial programming methods like Ladder Logic or Function Block Diagrams. These charts help make sure machines perform tasks in the right order, like filling bottles, moving products on assembly lines, or controlling chemical processes.
Examples in Resumes
Developed Sequential Function Chart programs for automotive assembly line control system
Optimized manufacturing processes using SFC and PLC programming
Created and maintained Sequential Function Charts for batch processing operations
Typical job title: "Automation Engineers"
Also try searching for:
Where to Find Automation Engineers
Online Communities
Professional Networks
Industry Resources
Example Interview Questions
Senior Level Questions
Q: How would you implement safety interlocks using Sequential Function Charts?
Expected Answer: A senior candidate should explain how they would use SFC to ensure machine safety, including emergency stops, safety barriers, and proper sequence validation. They should mention experience with safety standards and risk assessment.
Q: Describe a complex manufacturing process you've automated using SFC.
Expected Answer: They should be able to describe a real project, explaining how they broke down a complicated process into manageable steps, handled multiple parallel operations, and dealt with error conditions.
Mid Level Questions
Q: What are the key elements of a Sequential Function Chart?
Expected Answer: Should explain steps (stages), transitions, and actions in simple terms, and how they work together to control a process. Should give practical examples from industry.
Q: How do you handle error conditions in an SFC program?
Expected Answer: Should describe methods for detecting problems, implementing alarms, and creating recovery sequences. Should mention importance of operator safety and equipment protection.
Junior Level Questions
Q: What is the difference between a step and a transition in SFC?
Expected Answer: Should explain that steps are where actions happen (like 'fill tank') and transitions are conditions that must be met to move to the next step (like 'tank full sensor activated').
Q: Can you describe a simple example of where you would use SFC?
Expected Answer: Should be able to describe a basic process like controlling a conveyor belt or simple filling operation, showing understanding of sequential operations.
Experience Level Indicators
Junior (0-2 years)
- Basic SFC programming concepts
- Simple sequence creation
- Understanding of basic industrial processes
- Familiarity with safety requirements
Mid (2-5 years)
- Complex sequence development
- Troubleshooting and optimization
- Integration with other control systems
- Process efficiency improvements
Senior (5+ years)
- Advanced process control strategies
- Project leadership
- System architecture design
- Safety system implementation
Red Flags to Watch For
- No hands-on experience with industrial automation equipment
- Lack of understanding of basic safety principles
- No knowledge of industrial communication protocols
- Unable to read and interpret technical drawings
Related Terms
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