FBD, ST, and SFC

Question 1

In FBD language what do dashed connection lines represent?

Answer 1

Boolean signal

Question 2

In FBD language what do solid connection lines represent?

Answer 2

Real or Integer signal

Question 3

What is IREF and what are the used for?

Answer 3

Input Reference: takes an input from the I/O card and connects it to an input of a function block

Question 4

What is OREF and what is it used for?

Answer 4

Output Reference: assign values to an output by using the output reference

Question 5

What is ICON and OCON?

Answer 5

Input/Output wire connectors: take the output of one block and feed it into the output of another block