Deck 19: Sequential Function Chart Programming

Question 1

What must be done at the end of an SFC?

Answer 1

When an SFC completes its last step, you must either wire the last transition to the top of the first step or use a SFC stop element.

Question 2

In a(n) ____________________ branch, the SFC program checks each path from left to right; the first path with a true transition is executed and all others are ignored.

Answer 2

selection

Question 3

An SFC program is made up of steps, actions, and ____________________.

Answer 3

transitions

Question 4

Explain what happens when you use a Stop element.

Question 5

In a sequential function chart, you program steps and transitions that are arranged like a flowchart and when executed, control your system in a proscribed order.

Question 6

A selection branch is indicated by parallel horizontal lines at the top and bottom of the branch.

Question 7

Explain the function of transitions.

Question 8

If a transition is true, the SFC program goes to the next step; otherwise, it repeats the step above it.

Question 9

Explain the creation of steps in an SFC.

Question 10

Sequential function chart programming is most often used with an application that is sequential in nature and has ____________________ that can be defined.

Question 11

Each action (non-Boolean and Boolean) uses a(n) ____________________ to determine when it starts and stops.

Question 12

Explain the purpose of actions.

Question 13

An SFC program has linear, concurrent, and looping branch sequences to control the execution of your steps.

Question 14

You can use the step ____________________ timer within a transition to signal when the step has run the required time or too long and the SFC program should go to the next step.

Question 15

Sequential function chart (SFC) programming is a method of programming that is similar to designing a flowchart of your process.