Sequential Function Chart SFC Programming for Beginners

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▶ C'mon over to https://realpars.com where you can learn PLC programming faster and easier than you ever thought possible! • • ▶ You can read the full post here • https://realpars.com/sequential-funct... • ⌚Timestamps: • 00:00 - Intro • 00:51 - What is a sequence in SFC? • 01:36 - Init step • 02:02 - Step or State • 02:08 - Transition • 03:20 - Action and Qualifiers • 04:14 - SFC example • ============================= • In this video, we’ll introduce you to a PLC programming language called Sequential Function Chart, or SFC for short. We will also look at an SFC example. • The PLC programming standard IEC 61131-3 includes five programming languages: • – Ladder Diagram • – Function Block Diagram • – Instruction List • – Structured Text • – Sequential Function Chart • The SFC programming language is different compared to the four other languages. The SFC is used to program a sequence directly in the PLC. • An SFC program is composed of graphic symbols. Each graphic symbol represents one step. A step is the same as a state. • Init step: The first graphic symbol is used for initialization. This is named the init step. This is a square that is double-lined. Inside the square is a step name. When the PLC turns on the program will go into the initialization step and stay there. • Step or State: A Step is a single-lined square. • Transition: Each step is connected to the next step by a connection line. And a small horizontal line is added and this is called the transition. At the transition line, there must be a condition. • Action: An action can be added to a step if required. A line connects the Step to the Action. • Qualifiers: Inside the action box is a qualifier: • – An N qualifier means that the variable is TRUE only when the step is active. Therefore you don’t need to set the variable to FALSE when leaving the Step action. • – When using S as a qualifier, a TRUE will be stored for the variable inside the memory. This is used to keep the variable TRUE when leaving the step. • – If you need to reset the stored variable value, you can use R as a qualifier. • ============================= • Get a RealPars pro membership: https://learn.realpars.com/bundles/pro • ============================= • Missed our most recent videos? Watch them here: • https://realpars.com/laser-sensor • https://realpars.com/u-remote • https://realpars.com/datasheet • ============================= • To stay up to date with our last videos, make sure to subscribe to this YouTube channel: • http://bit.ly/realpars • ============================= • TWEET THIS VIDEO: https://ctt.ac/h2ZKQ • ============================= • Follow us on Facebook 👉 / therealpars • Follow us on Twitter 👉 / realpars • Follow us on LinkedIn 👉 / realpars • Follow us on Instagram 👉 / realparsdotcom • #RealPars #PLC #PLCprogramming

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