5 LADDER DIAGRAM
5.3 Statements and Notes
47
5
5.3 Statements and Notes
In a ladder program, statements and notes can be displayed.
Statements
By using statements, users can append comments to circuit blocks. Appending statements makes the processing flow easy to
understand.
Statements include line statements, P statements, and I statements.
A line statement can be displayed on a tree view of the Navigation window.
■Line statement
A comment is appended to a ladder block as a whole.
■P statement
A comment is appended to a pointer number.
■I statement
A comment is appended to an interrupt pointer number.
Notes
By using notes, users can append comments to coils and instructions in a program.
Appending notes makes the details of coils and application instructions easy to understand.
Types of statements and notes
"PLC" and "Peripheral" are the types of statements and notes.
Type Type Description
PLC • Line statement
• P statement
• I statement
•Note
Statements and notes can be stored on the CPU module.
PLC statement uses the following number of steps. (Decimal fraction is rounded down.)
• Without character: 3 steps
• With character: 4 + (Number of characters + 2 + 14) / 15 + Number of characters (steps)
Peripheral • Line statement
• P statement
• I statement
•Note
Strings of the description are not embedded in the program, but they are saved as attached
information of the program.
One statement or note line uses one step.
A * symbol is prefixed to the entered text automatically.
To Next Page
Loading...
